Refine
Has Fulltext
- no (10)
Author
- Benbow, W. (8)
- Bugaev, V. (8)
- Ciupik, L. (8)
- Falcone, A. (8)
- Finley, J. P. (8)
- Fortson, L. (8)
- Furniss, A. (8)
- Grube, J. (8)
- Gyuk, G. (8)
- Holder, J. (8)
- Kaaret, P. (8)
- Kieda, D. (8)
- McArthur, S. (8)
- McCann, A. (8)
- Moriarty, P. (8)
- Ragan, K. (8)
- Reyes, L. C. (8)
- Reynolds, P. T. (8)
- Roache, E. (8)
- Sembroski, G. H. (8)
- Wakely, S. P. (8)
- Williams, D. A. (8)
- Zitzer, B. (8)
- Connolly, M. P. (7)
- Cui, W. (7)
- Dumm, J. (7)
- Errando, M. (7)
- Feng, Q. (7)
- Gillanders, G. H. (7)
- Griffin, S. (7)
- Hanna, D. (7)
- Kertzman, M. (7)
- Krawczynski, H. (7)
- Krennrich, F. (7)
- Lang, M. J. (7)
- Maier, G. (7)
- Ong, R. A. (7)
- Park, N. (7)
- Perkins, J. S. (7)
- Prokoph, H. (7)
- Quinn, J. (7)
- Staszak, D. (7)
- Telezhinsky, Igor O. (7)
- Varlotta, A. (7)
- Vassiliev, V. V. (7)
- Weinstein, A. (7)
- Aune, T. (6)
- Beilicke, M. (6)
- Bird, R. (6)
- Buckley, J. H. (6)
- Cerruti, M. (6)
- Fortin, P. (6)
- Galante, N. (6)
- Hughes, G. (6)
- Humensky, T. B. (6)
- Khassen, Y. (6)
- Majumdar, P. (6)
- Mukherjee, R. (6)
- Otte, A. N. (6)
- Pohl, Martin (6)
- Popkow, A. (6)
- Welsing, R. (6)
- Aliu, E. (5)
- Archambault, S. (5)
- Arlen, T. (5)
- Bouvier, A. (5)
- Federici, Simone (5)
- Madhavan, A. S. (5)
- Nieto, D. (5)
- Richards, G. T. (5)
- Theiling, M. (5)
- Weekes, T. C. (5)
- Berger, K. (4)
- Boettcher, Markus (4)
- Cesarini, A. (4)
- Chen, Xuhui (4)
- Dickinson, H. J. (4)
- Griffiths, S. T. (4)
- Johnson, C. A. (4)
- Meagher, K. (4)
- Orr, M. (4)
- Smith, A. W. (4)
- Tyler, J. (4)
- Vincent, S. (4)
- Archer, A. (3)
- Barnacka, Anna (3)
- Behera, B. (3)
- Bordas, Pol (3)
- Byrum, K. (3)
- Böttcher, Markus (3)
- Cardenzana, J. V. (3)
- Collins-Hughes, E. (3)
- Conrad, Jan (3)
- Dickherber, R. (3)
- Duke, C. (3)
- Eisch, J. D. (3)
- Finnegan, G. (3)
- Fleischhack, H. (3)
- Gall, D. (3)
- Godambe, S. (3)
- Hakansson, Nils (3)
- Klepser, S. (3)
- Lemoine-Goumard, M. (3)
- Millis, J. (3)
- Nelson, T. (3)
- Oya, I. (3)
- Pichel, A. (3)
- Reimer, A. (3)
- Reimer, O. (3)
- Saxon, D. B. (3)
- Shahinyan, K. (3)
- Stawarz, L. (3)
- Tesic, G. (3)
- Tucci, J. V. (3)
- Wilhelm, Alina (3)
- Zanin, R. (3)
- Abramowski, Attila (2)
- Aharonian, Felix A. (2)
- Akhperjanian, A. G. (2)
- Angelakis, E. (2)
- Antonelli, L. A. (2)
- Antoranz, P. (2)
- Backes, Michael (2)
- Balzer, Arnim (2)
- Barrio, J. A. (2)
- Becherini, Yvonne (2)
- Bednarek, W. (2)
- Benkhali, Faical Ait (2)
- Bernardini, E. (2)
- Bernlöhr, K. (2)
- Biland, A. (2)
- Biteau, Jonathan (2)
- Blanch Bigas, O. (2)
- Boisson, Catherine (2)
- Bolmont, J. (2)
- Bonnefoy, S. (2)
- Bonnoli, G. (2)
- Bregeon, Johan (2)
- Bretz, T. (2)
- Brun, Francois (2)
- Brun, Pierre (2)
- Bulik, Tomasz (2)
- Carmona, E. (2)
- Carosi, A. (2)
- Carrigan, Svenja (2)
- Casanova, Sabrina (2)
- Chaves, Ryan C. G. (2)
- Chen, W. P. (2)
- Chiang, J. (2)
- Colafrancesco, Sergio (2)
- Colin, P. (2)
- Cologna, Gabriele (2)
- Colombo, E. (2)
- Contreras, J. L. (2)
- Cortina, J. (2)
- Covino, S. (2)
- Davids, I. D. (2)
- Dazzi, F. (2)
- De Lotto, B. (2)
- Degrange, B. (2)
- Deil, C. (2)
- Domainko, W. (2)
- Dorner, D. (2)
- Doro, M. (2)
- Dutson, K. (2)
- Dyks, J. (2)
- Edwards, T. (2)
- Egberts, Kathrin (2)
- Eger, P. (2)
- Elsaesser, D. (2)
- Farnier, C. (2)
- Fegan, S. (2)
- Fernandes, M. V. (2)
- Fiasson, A. (2)
- Foerster, A. (2)
- Fonseca, M. V. (2)
- Font, L. (2)
- Fontaine, G. (2)
- Fuessling, M. (2)
- Fuhrmann, L. (2)
- Fumagalli, M. (2)
- Funk, S. (2)
- Gallant, Y. A. (2)
- Garczarczyk, M. (2)
- Garrigoux, T. (2)
- Gaug, M. (2)
- Gerard, L. (2)
- Giavitto, G. (2)
- Giebels, B. (2)
- Glicenstein, J. F. (2)
- Grondin, M. -H. (2)
- Hahn, J. (2)
- Hayashida, M. (2)
- Heinzelmann, G. (2)
- Henri, G. (2)
- Hermann, G. (2)
- Hinton, James Anthony (2)
- Hofmann, W. (2)
- Holler, M. (2)
- Horan, D. (2)
- Horns, D. (2)
- Hose, J. (2)
- Hrupec, D. (2)
- Jacholkowska, A. (2)
- Jamrozy, M. (2)
- Janiak, M. (2)
- Jankowsky, F. (2)
- Jogler, T. (2)
- Kar, P. (2)
- Karlsson, N. (2)
- Kastendieck, M. A. (2)
- Kataoka, J. (2)
- Katarzynski, K. (2)
- Katz, U. (2)
- Khelifi, B. (2)
- Klochkov, D. (2)
- Kluzniak, W. (2)
- Kolitzus, D. (2)
- Komin, Nu. (2)
- Kosack, K. (2)
- Krakau, S. (2)
- Krichbaum, T. P. (2)
- Kumar, S. (2)
- Kurtanidze, O. M. (2)
- Kurtanidze, S. O. (2)
- La Barbera, A. (2)
- Laffon, H. (2)
- Lahteenmaki, A. (2)
- Lamanna, G. (2)
- Larionov, V. M. (2)
- Lefaucheur, J. (2)
- Lenain, J. -P. (2)
- Lindfors, E. (2)
- Lohse, T. (2)
- Lombardi, S. (2)
- Longo, F. (2)
- Lopez, M. (2)
- Lopez-Coto, R. (2)
- Lorenz, E. (2)
- Maneva, G. (2)
- Mannheim, K. (2)
- Marandon, V. (2)
- Maraschi, L. (2)
- Marcowith, Alexandre (2)
- Mariotti, M. (2)
- Martinez, M. (2)
- Marx, R. (2)
- Maurin, G. (2)
- Maxted, N. (2)
- Mayer, M. (2)
- Mazin, D. (2)
- Mehault, J. (2)
- Meyer, M. (2)
- Miranda, J. M. (2)
- Mirzoyan, R. (2)
- Moderski, R. (2)
- Mohamed, M. (2)
- Moralejo, A. (2)
- Moroni, P. G. Prada (2)
- Morozova, D. A. (2)
- Moulin, Emmanuel (2)
- Murach, T. (2)
- Niemiec, J. (2)
- Nikolashvili, M. G. (2)
- Nilsson, K. (2)
- Oakes, L. (2)
- Ohm, S. (2)
- Orito, R. (2)
- Ostrowski, M. (2)
- Paneque, D. (2)
- Panter, M. (2)
- Paoletti, R. (2)
- Paredes, J. M. (2)
- Parsons, R. D. (2)
- Pekeur, N. W. (2)
- Pelletier, G. (2)
- Perri, M. (2)
- Persic, M. (2)
- Petrucci, P. -O. (2)
- Peyaud, B. (2)
- Pita, S. (2)
- Pohl, M. (2)
- Poon, H. (2)
- Prandini, E. (2)
- Prester, Dijana Dominis (2)
- Puehlhofer, G. (2)
- Pueschel, Elisa (2)
- Puljak, I. (2)
- Punch, M. (2)
- Quirrenbach, A. (2)
- Raab, S. (2)
- Raiteri, C. M. (2)
- Rajotte, J. (2)
- Reinthal, R. (2)
- Renaud, M. (2)
- Rhode, W. (2)
- Ribo, M. (2)
- Rico, J. (2)
- Rieger, F. (2)
- Rowell, G. (2)
- Rudak, B. (2)
- Rulten, C. B. (2)
- Sadun, A. C. (2)
- Sahakian, V. (2)
- Saito, K. (2)
- Sanchez, David M. (2)
- Santangelo, Andrea (2)
- Satalecka, K. (2)
- Scapin, V. (2)
- Schlickeiser, R. (2)
- Schroedter, M. (2)
- Schultz, C. (2)
- Schulz, A. (2)
- Schwanke, U. (2)
- Schweizer, T. (2)
- Schwemmer, S. (2)
- Shore, S. N. (2)
- Sigua, L. A. (2)
- Sillanpaa, A. (2)
- Sitarek, J. (2)
- Skole, C. (2)
- Sobczynska, D. (2)
- Sol, H. (2)
- Spanier, F. (2)
- Spengler, G. (2)
- Spies, F. (2)
- Stamerra, A. (2)
- Steenkamp, R. (2)
- Stegmann, Christian (2)
- Stycz, K. (2)
- Sushch, Iurii (2)
- Takahashi, T. (2)
- Tavecchio, F. (2)
- Tavernet, J. -P. (2)
- Temnikov, P. (2)
- Terrier, R. (2)
- Terzic, T. (2)
- Tescaro, D. (2)
- Teshima, M. (2)
- Thibadeau, S. (2)
- Tibaldo, L. (2)
- Tjus, J. Becker (2)
- Tluczykont, M. (2)
- Tornikoski, M. (2)
- Trichard, C. (2)
- Troitsky, I. S. (2)
- Uchiyama, Y. (2)
- Vasileiadis, G. (2)
- Venter, C. (2)
- Viana, A. (2)
- Villata, M. (2)
- Vincent, P. (2)
- Voelk, H. J. (2)
- Wagner, P. (2)
- Wagner, R. M. (2)
- Wagner, S. J. (2)
- Weitzel, Q. (2)
- White, R. (2)
- Wierzcholska, A. (2)
- Willmann, P. (2)
- Woernlein, A. (2)
- Wouters, D. (2)
- Zacharias, M. (2)
- Zajczyk, A. (2)
- Zdziarski, A. A. (2)
- Zech, Alraune (2)
- Zensus, J. A. (2)
- de Bhroithe, A. O'Faolain (2)
- de Naurois, M. (2)
- de los Reyes, R. (2)
- van Eldik, C. (2)
- Abdalla, Hassan E. (1)
- Abdo, A. A. (1)
- Acciari, V. A. (1)
- Acero, F. (1)
- Ackermann, Margit (1)
- Ahnen, M. L. (1)
- Ajello, M. (1)
- Aleksic, J. (1)
- Allafort, A. J. (1)
- Aller, H. D. (1)
- Aller, M. F. (1)
- Andersson, T. (1)
- Anguner, Ekrem Oǧuzhan (1)
- Angüner, Ekrem Oǧuzhan (1)
- Ansoldi, S. (1)
- Anton, Gisela (1)
- Arakawa, M. (1)
- Arkharov, A. A. (1)
- Arribas, M. Paz (1)
- Arrieta, M. (1)
- Aubert, Pierre (1)
- Babic, A. (1)
- Bachev, R. (1)
- Baldini, L. (1)
- Balenderan, Shangkari (1)
- Ballet, J. (1)
- Banerjee, B. (1)
- Bangale, P. (1)
- Barbiellini, G. (1)
- Baring, M. G. (1)
- Barnard, Michelle (1)
- Bastieri, D. (1)
- Becerra Gonzalez, J. (1)
- Bechtol, K. C. (1)
- Bellazzini, R. (1)
- Berdyugin, A. (1)
- Berenji, B. (1)
- Berge, David (1)
- Bernhard, Sabrina (1)
- Biasuzzi, B. (1)
- Birsin, E. (1)
- Bissaldi, E. (1)
- Blackwell, R. (1)
- Blandford, R. D. (1)
- Blinov, D. A. (1)
- Bloom, E. D. (1)
- Bock, R. K. (1)
- Boggs, S. (1)
- Boller, A. (1)
- Boltuch, D. (1)
- Bonamente, E. (1)
- Borgland, A. W. (1)
- Borracci, F. (1)
- Bosch-Ramon, Valentin (1)
- Bose, D. (1)
- Bradbury, S. M. (1)
- Brandt, T. J. (1)
- Braun, I. (1)
- Brez, A. (1)
- Brigida, M. (1)
- Brucker, J. (1)
- Bruel, P. (1)
- Bryan, Mark (1)
- Buechele, M. (1)
- Buehler, R. (1)
- Buson, S. (1)
- C. (1)
- Calcidese, P. (1)
- Caliandro, G. A. (1)
- Camara, M. (1)
- Cameron, R. A. (1)
- Cannon, A. (1)
- Capalbi, M. (1)
- Capasso, M. (1)
- Caraveo, P. A. (1)
- Carr, John (1)
- Carraminana, A. (1)
- Carrasco, L. (1)
- Casandjian, J. M. (1)
- Cassaro, P. (1)
- Cavazzuti, E. (1)
- Cecchi, C. (1)
- Celik, O. (1)
- Chadwick, Paula M. (1)
- Chakraborty, N. (1)
- Chalme-Calvet, R. (1)
- Charles, E. (1)
- Chatterjee, A. (1)
- Cheesebrough, A. (1)
- Chekhtman, A. (1)
- Chen, Andrew (1)
- Cheung, C. C. (1)
- Chevalier, J. (1)
- Chretien, M. (1)
- Christensen, F. (1)
- Christiansen, J. L. (1)
- Ciprini, S. (1)
- Claus, R. (1)
- Clavero, R. (1)
- Coffaro, M. (1)
- Cohen-Tanugi, J. (1)
- Condon, B. (1)
- Couturier, C. (1)
- Craig, W. (1)
- Cui, Wei (1)
- Cui, Y. (1)
- Cutini, S. (1)
- Da Vela, P. (1)
- Dalton, M. (1)
- Damljanovic, G. (1)
- Daniel, M. K. (1)
- De Angelis, A. (1)
- De Bhroithe, A. O'Faolain (1)
- De Caneva, G. (1)
- De Maria, M. (1)
- De Sabata, F. (1)
- Decock, J. (1)
- Delgado Mendez, C. (1)
- Dermer, C. D. (1)
- Devin, J. (1)
- Di Pierro, F. (1)
- Dirson, L. (1)
- Djannati-Atai, A. (1)
- Djannati-Ataï, A. (1)
- Doert, M. (1)
- Dominguez, A. (1)
- Donath, A. (1)
- Drell, P. S. (1)
- Drury, L. O&rsquo (1)
- Dubois, R. (1)
- Dubus, G. (1)
- Dumora, D. (1)
- Dyrda, M. (1)
- Efimova, N. V. (1)
- Einecke, S. (1)
- Eisenacher Glawion, D. (1)
- Ernenwein, J. -P. (1)
- Eschbach, S. (1)
- Espigat, P. (1)
- Eswaraiah, C. (1)
- Favuzzi, C. (1)
- Federici, S. (1)
- Fegan, S. J. (1)
- Feinstein, F. (1)
- Ferenc, D. (1)
- Fernandez, D. (1)
- Fernandez-Barral, A. (1)
- Ferrara, E. C. (1)
- Fidalgo, D. (1)
- Focke, W. B. (1)
- Frailis, M. (1)
- Frantzen, K. (1)
- Fruck, C. (1)
- Fukazawa, Y. (1)
- Fusco, P. (1)
- Gabici, S. (1)
- Gajdus, M. (1)
- Galindo, D. (1)
- Garcia Lopez, R. J. (1)
- Garcia, J. Rodriguez (1)
- Gargano, F. (1)
- Garrido Terrats, D. (1)
- Gasparrini, D. (1)
- Gehrels, N. (1)
- Germani, S. (1)
- Giammaria, P. (1)
- Giglietto, N. (1)
- Giommi, P. (1)
- Giordano, F. (1)
- Giroletti, M. (1)
- Glanzman, T. (1)
- Godfrey, G. (1)
- Godinovi, N. (1)
- Godinovic, N. (1)
- Gonzalez Munoz, A. (1)
- Gonzalez, J. Becerra (1)
- Gottschall, D. (1)
- Goyal, A. (1)
- Grenier, I. A. (1)
- Grudzinska, M. (1)
- Guberman, D. (1)
- Guenette, R. (1)
- Guillemot, L. (1)
- Guiriec, S. (1)
- Gurwell, M. A. (1)
- Guver, T. (1)
- Hadasch, D. (1)
- Haeffner, S. (1)
- Hague, J. D. (1)
- Hailey, C. (1)
- Hanabata, Y. (1)
- Harisson, F. (1)
- Harris, J. (1)
- Haupt, M. (1)
- Hawkes, J. (1)
- Hays, E. (1)
- Herrera, J. (1)
- Herrero, A. (1)
- Hervet, O. (1)
- Hildebrand, D. (1)
- Hillert, A. (1)
- Hoehne-Moench, D. (1)
- Hofverberg, P. (1)
- Hoischen, Clemens (1)
- Holch, Tim Lukas (1)
- Hovatta, T. (1)
- Huan, H. (1)
- Huang, D. (1)
- Hughes, R. E. (1)
- Hughes, Z. (1)
- Hui, C. M. (1)
- Ibryamov, S. I. (1)
- Idec, W. (1)
- Ivascenko, A. (1)
- Iwasaki, H. (1)
- Jadhav, J. (1)
- Jahn, C. (1)
- Jankowsky, D. (1)
- Jingo, M. (1)
- Johannesson, G. (1)
- Johnson, A. S. (1)
- Johnson, W. N. (1)
- Joner, M. D. (1)
- Jordan, B. (1)
- Jorstad, S. G. (1)
- Joshi, M. (1)
- Jouvin, L. (1)
- Jung, I. (1)
- Jung-Richardt, I. (1)
- Kadler, M. (1)
- Kamae, T. (1)
- Kaplan, K. (1)
- Karamanavis, V. (1)
- Katagiri, H. (1)
- Katsuragawa, M. (1)
- Kaufmann, S. (1)
- Kellermann, H. (1)
- Kerszberg, D. (1)
- Khangulyan, D. (1)
- Kieffer, M. (1)
- Kimeridze, G. (1)
- King, J. (1)
- Kneiske, T. (1)
- Knoedlseder, J. (1)
- Kodani, K. (1)
- Konno, Y. (1)
- Konopelko, A. (1)
- Konstantinova, T. S. (1)
- Kopatskaya, E. N. (1)
- Koptelova, E. (1)
- Kovalev, Y. Y. (1)
- Kovalev, Yu. A. (1)
- Kraehenbuehl, T. (1)
- Kranich, D. (1)
- Kraus, M. (1)
- Krause, J. (1)
- Krause, M. (1)
- Krayzel, F. (1)
- Krimm, H. A. (1)
- Krueger, P. P. (1)
- Kruger, P. P. (1)
- Kubo, H. (1)
- Kushida, J. (1)
- Kuss, M. (1)
- Lande, J. (1)
- Larionova, E. G. (1)
- Larionova, L. V. (1)
- Latev, G. (1)
- Latronico, L. (1)
- Lau, J. (1)
- Lee, K. (1)
- Lee, S. -H. (1)
- Lees, J. -P. (1)
- Lefranc, V. (1)
- Lelas, D. (1)
- Lemiere, A. (1)
- Lennarz, D. (1)
- Leonardo, E. (1)
- Leser, Eva (1)
- Leto, Paolo (1)
- Lewandowska, N. (1)
- Ligustri, R. (1)
- Lin, H. C. (1)
- Lin, T. T. Y. (1)
- Lister, M. L. (1)
- Liu, R. (1)
- Loparco, F. (1)
- Lopatin, A. (1)
- Lopen, R. J. Garcia (1)
- Lopez-Oramas, A. (1)
- Lorentz, M. (1)
- Lott, B. (1)
- Lovellette, M. N. (1)
- Lu, C. -C. (1)
- Lubrano, P. (1)
- Lypova, I. (1)
- Maccaferri, G. (1)
- Madejski, G. (1)
- Madejski, G. M. (1)
- Madhavan, A. (1)
- Makariev, E. (1)
- Makariev, M. (1)
- Makeev, A. (1)
- Mallot, K. (1)
- Manganaro, M. (1)
- Mankuzhiyil, N. (1)
- Marcote, B. (1)
- Mariaud, C. (1)
- Max-Moerbeck, W. (1)
- Mazziotta, Mario Nicola (1)
- McComb, T. J. L. (1)
- McCutcheon, M. (1)
- McEnery, J. E. (1)
- Medina, M. C. (1)
- Meintjes, P. J. (1)
- Mendez, C. Delgado (1)
- Menzel, U. (1)
- Menzler, U. (1)
- Meucci, M. (1)
- Michelson, P. F. (1)
- Mitchell, A. M. W. (1)
- Mitthumsiri, W. (1)
- Miyamoto, H. (1)
- Mizuno, T. (1)
- Mohrmann, L. (1)
- Moiseev, A. A. (1)
- Mokrushina, A. A. (1)
- Moldon, J. (1)
- Monte, C. (1)
- Monzani, M. E. (1)
- Moody, J. W. (1)
- Mora, K. (1)
- Mori, Y. (1)
- Morselli, A. (1)
- Moskalenko, I. V. (1)
- Murgia, S. (1)
- Myserlis, I. (1)
- Nakajima, D. (1)
- Nakashima, S. (1)
- Nalewajko, K. (1)
- Naumann, C. L. (1)
- Naumann-Godo, M. (1)
- Nedbal, D. (1)
- Nestoras, I. (1)
- Neustroev, V. (1)
- Niederwanger, F. (1)
- Niedzwiecki, A. (1)
- Nieto, Daniel (1)
- Nievas Rosillo, M. (1)
- Nishijima, K. (1)
- Nishino, S. (1)
- Noda, K. (1)
- Nolan, P. L. (1)
- Nolan, S. J. (1)
- Norris, J. P. (1)
- Nuss, E. (1)
- Odaka, H. (1)
- Ohsugi, T. (1)
- Okumura, A. (1)
- Omodei, N. (1)
- Ong, R. (1)
- Opitz, B. (1)
- Orlando, E. (1)
- Orlati, A. (1)
- Ormes, J. F. (1)
- Ortega, A. Diago (1)
- Otte, N. (1)
- Overkemping, A. (1)
- Pace, C. (1)
- Padovani, M. (1)
- Pagani, C. (1)
- Paiano, S. (1)
- Palacio, J. (1)
- Palatiello, M. (1)
- Pandel, D. (1)
- Panetta, J. H. (1)
- Paredes-Fortuny, X. (1)
- Parent, D. (1)
- Partini, S. (1)
- Pasanen, M. (1)
- Pauss, F. (1)
- Pavlidou, V. (1)
- Pearson, R. (1)
- Pearson, T. J. (1)
- Pegna, R. G. (1)
- Pelassa, V. (1)
- Pepe, M. (1)
- Perennes, C. (1)
- Perez, J. (1)
- Perez-Torres, M. A. (1)
- Peruzzo, J. (1)
- Pesce-Rollins, M. (1)
- Petry, D. (1)
- Piel, Q. (1)
- Piner, B. G. (1)
- Piron, F. (1)
- Pochon, J. (1)
- Porter, T. A. (1)
- Poutanen, J. (1)
- Prada, F. (1)
- Prochaska, J. X. (1)
- Prokhorov, D. (1)
- Puchades, N. (1)
- Pushkarev, A. B. (1)
- Raino, S. (1)
- Ramakrishnan, V. (1)
- Rando, R. (1)
- Ratliff, G. (1)
- Raue, M. (1)
- Rauth, R. (1)
- Razzano, M. (1)
- Readhead, A. (1)
- Readhead, A. C. R. (1)
- Reichardt, T. (1)
- Richards, J. L. (1)
- Richter, S. (1)
- Ripken, J. (1)
- Rissi, M. (1)
- Ritz, S. (1)
- Rob, L. (1)
- Romoli, C. (1)
- Ros, E. (1)
- Rose, H. J. (1)
- Rosier-Lees, S. (1)
- Roth, M. (1)
- Rovero, A. C. (1)
- Ruegamer, S. (1)
- Sadrozinski, H. F. -W. (1)
- Saggion, A. (1)
- Saito, S. (1)
- Saito, T. (1)
- Saito, T. Y. (1)
- Sakamoto, T. (1)
- Salek, D. (1)
- Salvati, M. (1)
- Sanchez, D. (1)
- Sanchez-Conde, M. (1)
- Sander, A. (1)
- Santander, M. (1)
- Sasaki, M. (1)
- Scalzotto, V. (1)
- Scargle, J. D. (1)
- Schuessler, F. (1)
- Schussler, F. (1)
- Schwarzburg, S. (1)
- Seglar-Arroyo, M. (1)
- Semkov, E. H. (1)
- Senturk, G. D. (1)
- Settimo, M. (1)
- Seyffert, A. S. (1)
- Sgro, C. (1)
- Shafi, N. (1)
- Shayduk, M. (1)
- Shilon, I. (1)
- Sierpowska-Bartosik, A. (1)
- Sievers, A. (1)
- Simoni, R. (1)
- Siskind, E. J. (1)
- Smith, P. D. (1)
- Snidaric, I. (1)
- Soares-Furtado, M. (1)
- Sokolovsky, K. V. (1)
- Spandre, G. (1)
- Spinelli, P. (1)
- Spiro, S. (1)
- Steele, D. (1)
- Steinbring, T. (1)
- Steinke, B. (1)
- Stern, D. (1)
- Stevenson, M. (1)
- Stinzing, F. (1)
- Storz, J. (1)
- Strah, N. (1)
- Strickman, M. S. (1)
- Strigachev, A. (1)
- Struebig, J. C. (1)
- Strzys, M. (1)
- Suric, T. (1)
- Suson, D. J. (1)
- Sweeney, K. (1)
- Swordy, S. P. (1)
- Szostek, A. (1)
- Takahashi, H. (1)
- Takalo, L. (1)
- Takalo, L. O. (1)
- Takami, H. (1)
- Tammi, J. (1)
- Tanaka, T. (1)
- Tavernier, T. (1)
- Taylor, A. M. (1)
- Thaele, J. (1)
- Thayer, J. B. (1)
- Thayer, J. G. (1)
- Thompson, D. J. (1)
- Tiziani, D. (1)
- Torres, D. F. (1)
- Torres, F. (1)
- Tosti, G. (1)
- Toyama, T. (1)
- Tramacere, A. (1)
- Treves, A. (1)
- Tridon, D. Borla (1)
- Troitskaya, Y. V. (1)
- Tsuji, N. (1)
- Tsurusaki, K. (1)
- Tuffs, R. (1)
- Ungerechts, H. (1)
- Urry, M. (1)
- Usher, T. L. (1)
- Valerius, K. (1)
- Vandenbroucke, J. (1)
- Vankov, H. (1)
- Vasileiou, V. (1)
- Veh, J. (1)
- Verguilov, V. (1)
- Verrecchia, F. (1)
- Vilchez, N. (1)
- Vince, O. (1)
- Vink, J. (1)
- Vitale, V. (1)
- Vivier, M. (1)
- Voisin, F. (1)
- Volpe, F. (1)
- Vorster, M. (1)
- Vovk, I. (1)
- Vuillaume, T. (1)
- Wadiasingh, Z. (1)
- Waite, A. P. (1)
- Wang, P. (1)
- Ward, J. E. (1)
- Ward, M. (1)
- Wehrle, A. E. (1)
- Weidinger, M. (1)
- Weiner, O. M. (1)
- Weisgarber, T. (1)
- Wilhelmi, E. de Ona (1)
- Will, M. (1)
- Winer, B. L. (1)
- Wood, K. S. (1)
- Wood, M. (1)
- Yang, R. (1)
- Yang, Z. (1)
- Yatsu, Y. (1)
- Ylinen, T. (1)
- Zabalza, V. (1)
- Zaborov, D. (1)
- Zandanel, F. (1)
- Zechlin, H. -S. (1)
- Zefi, F. (1)
- Zhang, W. (1)
- Ziegler, A. (1)
- Ziegler, M. (1)
- Zook, A. (1)
- Zywucka, N. (1)
- de Almeida, U. Barres (1)
- de Angelis, A. (1)
- de Ona Wilhelmi, E. (1)
- de Palma, F. (1)
- de Wilt, P. (1)
- de la Fuente, E. (1)
- deWilt, P. (1)
- del Pozo, E. De Cea (1)
- do Couto e Silva, E. (1)
- van Rensburg, C. (1)
- van Soelen, B. (1)
- van der Walt, D. J. (1)
Document Type
- Article (10)
Language
- English (10)
Is part of the Bibliography
- yes (10)
Keywords
- BL Lacertae objects: general (10) (remove)
Institute
Aliu, E. ; Archer, A. ; Aune, T. ; Barnacka, Anna ; Behera, B. ; Beilicke, M. ; Benbow, W. ; Berger, K. ; Bird, R. ; Buckley, J. H. ; Bugaev, V. ; Byrum, K. ; Cardenzana, J. V. ; Cerruti, M. ; Chen, Xuhui ; Ciupik, L. ; Connolly, M. P. ; Cui, Wei ; Dickinson, H. J. ; Dumm, J. ; Eisch, J. D. ; Errando, M. ; Falcone, A. ; Federici, Simone ; Feng, Q. ; Finley, J. P. ; Fortin, P. ; Fortson, L. ; Furniss, A. ; Galante, N. ; Gillanders, G. H. ; Griffin, S. ; Griffiths, S. T. ; Grube, J. ; Gyuk, G. ; Hakansson, Nils ; Hanna, D. ; Holder, J. ; Hughes, G. ; Humensky, T. B. ; Johnson, C. A. ; Kaaret, P. ; Kar, P. ; Kertzman, M. ; Khassen, Y. ; Kieda, D. ; Krawczynski, H. ; Krennrich, F. ; Kumar, S. ; Lang, M. J. ; Madhavan, A. ; McArthur, S. ; McCann, A. ; Meagher, K. ; Millis, J. ; Moriarty, P. ; Nieto, Daniel ; Ong, R. A. ; Orr, M. ; Otte, A. N. ; Park, N. ; Perkins, J. S. ; Pohl, Martin ; Popkow, A. ; Prokoph, H. ; Pueschel, Elisa ; Quinn, J. ; Ragan, K. ; Rajotte, J. ; Reyes, L. C. ; Reynolds, P. T. ; Richards, G. T. ; Roache, E. ; Sembroski, G. H. ; Shahinyan, K. ; Staszak, D. ; Telezhinsky, Igor O. ; Tucci, J. V. ; Tyler, J. ; Varlotta, A. ; Vassiliev, V. V. ; Wakely, S. P. ; Weinstein, A. ; Welsing, R. ; Wilhelm, Alina ; Williams, D. A. ; Zitzer, B.
We present results from VERITAS observations of the BL Lac object PG 1553+113 spanning the years 2010, 2011, and 2012. The time-averaged spectrum, measured between 160 and 560 GeV, is well described by a power law with a spectral index of 4.33 +/- 0.09. The time-averaged integral flux above 200 GeV measured for this period was (1.69 +/- 0.06) x 10(-11) photons cm(-2) s(-1), corresponding to 6.9% of the Crab Nebula flux. We also present the combined gamma-ray spectrum from the Fermi Large Area Telescope and VERITAS covering an energy range from 100 MeV to 560 GeV. The data are well fit by a power law with an exponential cutoff at 101.9 +/- 3.2 GeV. The origin of the cutoff could be intrinsic to PG 1553+113 or be due to the gamma-ray opacity of our universe through pair production off the extragalactic background light (EBL). Given lower limits to the redshift of z > 0.395 based on optical/UV observations of PG 1553+113, the cutoff would be dominated by EBL absorption. Conversely, the small statistical uncertainties of the VERITAS energy spectrum have allowed us to provide a robust upper limit on the redshift of PG 1553+113 of z <= 0.62. A strongly elevated mean flux of (2.50 +/- 0.14) x10(-11) photons cm(-2) s(-1) (10.3% of the Crab Nebula flux) was observed during 2012, with the daily flux reaching as high as (4.44 +/- 0.71) x10(-11) photons cm(-2) s(-1) (18.3% of the Crab Nebula flux) on MJD 56048. The light curve measured during the 2012 observing season is marginally inconsistent with a steady flux, giving a chi(2) probability for a steady flux of 0.03%.
Aliu, E. ; Archambault, S. ; Arlen, T. ; Aune, T. ; Beilicke, M. ; Benbow, W. ; Boettcher, Markus ; Bouvier, A. ; Buckley, J. H. ; Bugaev, V. ; Cesarini, A. ; Ciupik, L. ; Collins-Hughes, E. ; Connolly, M. P. ; Cui, W. ; Dickherber, R. ; Duke, C. ; Dumm, J. ; Errando, M. ; Falcone, A. ; Federici, Simone ; Feng, Q. ; Finley, J. P. ; Finnegan, G. ; Fortson, L. ; Furniss, A. ; Galante, N. ; Gall, D. ; Godambe, S. ; Griffin, S. ; Grube, J. ; Gyuk, G. ; Hanna, D. ; Holder, J. ; Huan, H. ; Kaaret, P. ; Karlsson, N. ; Khassen, Y. ; Kieda, D. ; Krawczynski, H. ; Krennrich, F. ; Lee, K. ; Madhavan, A. S. ; Maier, G. ; Majumdar, P. ; McArthur, S. ; McCann, A. ; Moriarty, P. ; Mukherjee, R. ; Nelson, T. ; de Bhroithe, A. O'Faolain ; Ong, R. A. ; Orr, M. ; Otte, A. N. ; Park, N. ; Perkins, J. S. ; Pichel, A. ; Pohl, Martin ; Prokoph, H. ; Quinn, J. ; Ragan, K. ; Reyes, L. C. ; Reynolds, P. T. ; Roache, E. ; Saxon, D. B. ; Sembroski, G. H. ; Staszak, D. ; Telezhinsky, Igor O. ; Tesic, G. ; Theiling, M. ; Thibadeau, S. ; Tsurusaki, K. ; Varlotta, A. ; Vassiliev, V. V. ; Vincent, S. ; Vivier, M. ; Wakely, S. P. ; Weekes, T. C. ; Weinstein, A. ; Welsing, R. ; Williams, D. A. ; Zitzer, B. ; Fortin, P. ; Horan, D. ; Fumagalli, M. ; Kaplan, K. ; Prochaska, J. X.
We report on VERITAS very high energy (VHE; E >= 100 GeV) observations of six blazars selected from the Fermi Large Area Telescope First Source Catalog (1FGL). The gamma-ray emission from 1FGL sources was extrapolated up to the VHE band, taking gamma-ray absorption by the extragalactic background light into account. This allowed the selection of six bright, hard-spectrum blazars that were good candidate TeV emitters. Spectroscopic redshift measurements were attempted with the Keck Telescope for the targets without Sloan Digital Sky Survey spectroscopic data. No VHE emission is detected during the observations of the six sources described here. Corresponding TeV upper limits are presented, along with contemporaneous Fermi observations and non-concurrent Swift UVOT and X-Ray Telescope data. The blazar broadband spectral energy distributions (SEDs) are assembled and modeled with a single-zone synchrotron self-Compton model. The SED built for each of the six blazars shows a synchrotron peak bordering between the intermediate-and high-spectrum-peak classifications, with four of the six resulting in particle-dominated emission regions.
Aliu, E. ; Archambault, S. ; Arlen, T. ; Aune, T. ; Beilicke, M. ; Benbow, W. ; Bird, R. ; Boettcher, Markus ; Bouvier, A. ; Bugaev, V. ; Byrum, K. ; Cesarini, A. ; Ciupik, L. ; Collins-Hughes, E. ; Connolly, M. P. ; Cui, W. ; Dickherber, R. ; Duke, C. ; Dumm, J. ; Errando, M. ; Falcone, A. ; Federici, Simone ; Feng, Q. ; Finley, J. P. ; Finnegan, G. ; Fortson, L. ; Furniss, A. ; Galante, N. ; Gall, D. ; Gillanders, G. H. ; Griffin, S. ; Grube, J. ; Gyuk, G. ; Hanna, D. ; Holder, J. ; Hughes, G. ; Humensky, T. B. ; Kaaret, P. ; Kertzman, M. ; Khassen, Y. ; Kieda, D. ; Krawczynski, H. ; Krennrich, F. ; Lang, M. J. ; Madhavan, A. S. ; Maier, G. ; Majumdar, P. ; McArthur, S. ; McCann, A. ; Moriarty, P. ; Mukherjee, R. ; Nelson, T. ; de Bhroithe, A. O'Faolain ; Ong, R. A. ; Orr, M. ; Otte, A. N. ; Park, N. ; Perkins, J. S. ; Pichel, A. ; Pohl, Martin ; Popkow, A. ; Prokoph, H. ; Quinn, J. ; Ragan, K. ; Reyes, L. C. ; Reynolds, P. T. ; Roache, E. ; Saxon, D. B. ; Schroedter, M. ; Sembroski, G. H. ; Skole, C. ; Smith, A. W. ; Staszak, D. ; Telezhinsky, Igor O. ; Theiling, M. ; Tyler, J. ; Varlotta, A. ; Vassiliev, V. V. ; Wakely, S. P. ; Weekes, T. C. ; Weinstein, A. ; Welsing, R. ; Williams, D. A. ; Zitzer, B.
We report on the VERITAS observations of the high-frequency peaked BL Lac object 1ES 1959+650 in the period 2007-2011. This source is detected at TeV energies by VERITAS at 16.4 standard deviation (sigma) significance in 7.6 hr of observation in a low flux state. A multiwavelength spectral energy distribution (SED) is constructed from contemporaneous data from VERITAS, Fermi-LAT, RXTE PCA, and Swift UVOT. Swift XRT data is not included in the SED due to a lack of simultaneous observations with VERITAS. In contrast to the orphan gamma-ray flare exhibited by this source in 2002, the X-ray flux of the source is found to vary by an order of magnitude, while other energy regimes exhibit less variable emission. A quasi-equilibrium synchrotron self-Compton model with an additional external radiation field is used to describe three SEDs corresponding to the lowest, highest, and average X-ray states. The variation in the X-ray spectrum is modeled by changing the electron injection spectral index, with minor adjustments of the kinetic luminosity in electrons. This scenario produces small-scale flux variability of the order of less than or similar to 2 in the high energy (E > 1MeV) and very high energy (E > 100 GeV) gamma-ray regimes, which is corroborated by the Fermi-LAT, VERITAS, and Whipple 10 m telescope light curves.
Measurement of the EBL spectral energy distribution using the VHE gamma-ray spectra of HESS blazars
(2017)
Abdalla, Hassan E. ; Abramowski, Attila ; Aharonian, Felix A. ; Benkhali, Faical Ait ; Akhperjanian, A. G. ; Andersson, T. ; Anguner, Ekrem Oǧuzhan ; Arakawa, M. ; Arrieta, M. ; Aubert, Pierre ; Backes, Michael ; Balzer, Arnim ; Barnard, Michelle ; Becherini, Yvonne ; Tjus, J. Becker ; Berge, David ; Bernhard, Sabrina ; Bernlöhr, K. ; Blackwell, R. ; Böttcher, Markus ; Boisson, Catherine ; Bolmont, J. ; Bonnefoy, S. ; Bordas, Pol ; Bregeon, Johan ; Brun, Francois ; Brun, Pierre ; Bryan, Mark ; Buechele, M. ; Bulik, Tomasz ; Capasso, M. ; Carr, John ; Casanova, Sabrina ; Cerruti, M. ; Chakraborty, N. ; Chaves, Ryan C. G. ; Chen, Andrew ; Chevalier, J. ; Coffaro, M. ; Colafrancesco, Sergio ; Cologna, Gabriele ; Condon, B. ; Conrad, Jan ; Cui, Y. ; Davids, I. D. ; Decock, J. ; Degrange, B. ; Deil, C. ; Devin, J. ; de Wilt, P. ; Dirson, L. ; Djannati-Atai, A. ; Domainko, W. ; Donath, A. ; Dutson, K. ; Dyks, J. ; Edwards, T. ; Egberts, Kathrin ; Eger, P. ; Ernenwein, J. -P. ; Eschbach, S. ; Farnier, C. ; Fegan, S. ; Fernandes, M. V. ; Fiasson, A. ; Fontaine, G. ; Foerster, A. ; Funk, S. ; Fuessling, M. ; Gabici, S. ; Gallant, Y. A. ; Garrigoux, T. ; Giavitto, G. ; Giebels, B. ; Glicenstein, J. F. ; Gottschall, D. ; Goyal, A. ; Grondin, M. -H. ; Hahn, J. ; Haupt, M. ; Hawkes, J. ; Heinzelmann, G. ; Henri, G. ; Hermann, G. ; Hinton, James Anthony ; Hofmann, W. ; Hoischen, Clemens ; Holch, Tim Lukas ; Holler, M. ; Horns, D. ; Ivascenko, A. ; Iwasaki, H. ; Jacholkowska, A. ; Jamrozy, M. ; Janiak, M. ; Jankowsky, D. ; Jankowsky, F. ; Jingo, M. ; Jogler, T. ; Jouvin, L. ; Jung-Richardt, I. ; Kastendieck, M. A. ; Katarzynski, K. ; Katsuragawa, M. ; Katz, U. ; Kerszberg, D. ; Khangulyan, D. ; Khelifi, B. ; King, J. ; Klepser, S. ; Klochkov, D. ; Kluzniak, W. ; Kolitzus, D. ; Komin, Nu. ; Kosack, K. ; Krakau, S. ; Kraus, M. ; Kruger, P. P. ; Laffon, H. ; Lamanna, G. ; Lau, J. ; Lees, J. -P. ; Lefaucheur, J. ; Lefranc, V. ; Lemiere, A. ; Lemoine-Goumard, M. ; Lenain, J. -P. ; Leser, Eva ; Lohse, T. ; Lorentz, M. ; Liu, R. ; Lopez-Coto, R. ; Lypova, I. ; Marandon, V. ; Marcowith, Alexandre ; Mariaud, C. ; Marx, R. ; Maurin, G. ; Maxted, N. ; Mayer, M. ; Meintjes, P. J. ; Meyer, M. ; Mitchell, A. M. W. ; Moderski, R. ; Mohamed, M. ; Mohrmann, L. ; Mora, K. ; Moulin, Emmanuel ; Murach, T. ; Nakashima, S. ; de Naurois, M. ; Niederwanger, F. ; Niemiec, J. ; Oakes, L. ; Odaka, H. ; Ohm, S. ; Ostrowski, M. ; Oya, I. ; Padovani, M. ; Panter, M. ; Parsons, R. D. ; Pekeur, N. W. ; Pelletier, G. ; Perennes, C. ; Petrucci, P. -O. ; Peyaud, B. ; Piel, Q. ; Pita, S. ; Poon, H. ; Prokhorov, D. ; Prokoph, H. ; Puehlhofer, G. ; Punch, M. ; Quirrenbach, A. ; Raab, S. ; Rauth, R. ; Reimer, A. ; Reimer, O. ; Renaud, M. ; de los Reyes, R. ; Richter, S. ; Rieger, F. ; Romoli, C. ; Rowell, G. ; Rudak, B. ; Rulten, C. B. ; Sahakian, V. ; Saito, S. ; Salek, D. ; Sanchez, David M. ; Santangelo, Andrea ; Sasaki, M. ; Schlickeiser, R. ; Schussler, F. ; Schulz, A. ; Schwanke, U. ; Schwemmer, S. ; Seglar-Arroyo, M. ; Settimo, M. ; Seyffert, A. S. ; Shafi, N. ; Shilon, I. ; Simoni, R. ; Sol, H. ; Spanier, F. ; Spengler, G. ; Spies, F. ; Stawarz, L. ; Steenkamp, R. ; Stegmann, Christian ; Stycz, K. ; Sushch, Iurii ; Takahashi, T. ; Tavernet, J. -P. ; Tavernier, T. ; Taylor, A. M. ; Terrier, R. ; Tibaldo, L. ; Tiziani, D. ; Tluczykont, M. ; Trichard, C. ; Tsuji, N. ; Tuffs, R. ; Uchiyama, Y. ; van der Walt, D. J. ; van Eldik, C. ; van Rensburg, C. ; van Soelen, B. ; Vasileiadis, G. ; Veh, J. ; Venter, C. ; Viana, A. ; Vincent, P. ; Vink, J. ; Voisin, F. ; Voelk, H. J. ; Vuillaume, T. ; Wadiasingh, Z. ; Wagner, S. J. ; Wagner, P. ; Wagner, R. M. ; White, R. ; Wierzcholska, A. ; Willmann, P. ; Woernlein, A. ; Wouters, D. ; Yang, R. ; Zaborov, D. ; Zacharias, M. ; Zanin, R. ; Zdziarski, A. A. ; Zech, Alraune ; Zefi, F. ; Ziegler, A. ; Zywucka, N.
Very high-energy gamma rays (VHE, E greater than or similar to 100 GeV) propagating over cosmological distances can interact with the low-energy photons of the extragalactic background light (EBL) and produce electron-positron pairs. The transparency of the Universe to VHE gamma rays is then directly related to the spectral energy distribution (SED) of the EBL. The observation of features in the VHE energy spectra of extragalactic sources allows the EBL to be measured, which otherwise is very difficult. An EBL model-independent measurement of the EBL SED with the H.E.S.S. array of Cherenkov telescopes is presented. It was obtained by extracting the EBL absorption signal from the reanalysis of high-quality spectra of blazars. From H.E.S.S. data alone the EBL signature is detected at a significance of 9.5 sigma, and the intensity of the EBL obtained in different spectral bands is presented together with the associated gamma-ray horizon.
Aliu, E. ; Archambault, S. ; Arlen, T. ; Aune, T. ; Beilicke, M. ; Benbow, W. ; Bird, R. ; Bouvier, A. ; Buckley, J. H. ; Bugaev, V. ; Cesarini, A. ; Ciupik, L. ; Connolly, M. P. ; Cui, W. ; Dumm, J. ; Errando, M. ; Falcone, A. ; Federici, Simone ; Feng, Q. ; Finley, J. P. ; Fortin, P. ; Fortson, L. ; Furniss, A. ; Galante, N. ; Gerard, L. ; Gillanders, G. H. ; Griffin, S. ; Grube, J. ; Gyuk, G. ; Hanna, D. ; Holder, J. ; Hughes, G. ; Humensky, T. B. ; Kaaret, P. ; Kertzman, M. ; Khassen, Y. ; Kieda, D. ; Krawczynski, H. ; Krennrich, F. ; Lang, M. J. ; Madhavan, A. S. ; Maier, G. ; Majumdar, P. ; McArthur, S. ; McCann, A. ; Moriarty, P. ; Mukherjee, R. ; Nieto, D. ; De Bhroithe, A. O'Faolain ; Ong, R. A. ; Orr, M. ; Otte, A. N. ; Park, N. ; Perkins, J. S. ; Pohl, Martin ; Popkow, A. ; Prokoph, H. ; Quinn, J. ; Ragan, K. ; Reyes, L. C. ; Reynolds, P. T. ; Richards, G. T. ; Roache, E. ; Saxon, D. B. ; Sembroski, G. H. ; Skole, C. ; Smith, A. W. ; Soares-Furtado, M. ; Staszak, D. ; Telezhinsky, Igor O. ; Tesic, G. ; Theiling, M. ; Varlotta, A. ; Vassiliev, V. V. ; Vincent, S. ; Wakely, S. P. ; Weekes, T. C. ; Weinstein, A. ; Welsing, R. ; Williams, D. A. ; Zitzer, B. ; Böttcher, Markus ; Fumagalli, M. ; Jadhav, J.
We report on VERITAS observations of the BL Lac object B2 1215+30 between 2008 and 2012. During this period, the source was detected at very high energies (VHEs; E > 100 GeV) by VERITAS with a significance of 8.9s and showed clear variability on timescales larger than months. In 2011, the source was found to be in a relatively bright state and a power-law fit to the differential photon spectrum yields a spectral index of 3.6 +/- 0.4(stat) +/- 0.3(syst) with an integral flux above 200 GeV of (8.0 +/- 0.9(stat) +/- 3.2(syst)) x 10(-12) cm(-2) s(-1). No short term variability could be detected during the bright state in 2011. Multi-wavelength data were obtained contemporaneously with the VERITAS observations in 2011 and cover optical (Super-LOTIS, MDM, Swift/UVOT), X-ray (Swift/XRT), and gamma-ray (Fermi-LAT) frequencies. These were used to construct the spectral energy distribution (SED) of B2 1215+30. A one-zone leptonic model is used to model the blazar emission and the results are compared to those of MAGIC from early 2011 and other VERITAS-detected blazars. The SED can be reproduced well with model parameters typical for VHE-detected BL Lac objects.
Abdo, A. A. ; Ackermann, Margit ; Ajello, M. ; Allafort, A. J. ; Baldini, L. ; Ballet, J. ; Barbiellini, G. ; Baring, M. G. ; Bastieri, D. ; Bechtol, K. C. ; Bellazzini, R. ; Berenji, B. ; Blandford, R. D. ; Bloom, E. D. ; Bonamente, E. ; Borgland, A. W. ; Bouvier, A. ; Brandt, T. J. ; Bregeon, Johan ; Brez, A. ; Brigida, M. ; Bruel, P. ; Buehler, R. ; Buson, S. ; Caliandro, G. A. ; Cameron, R. A. ; Cannon, A. ; Caraveo, P. A. ; Carrigan, Svenja ; Casandjian, J. M. ; Cavazzuti, E. ; Cecchi, C. ; Celik, O. ; Charles, E. ; Chekhtman, A. ; Cheung, C. C. ; Chiang, J. ; Ciprini, S. ; Claus, R. ; Cohen-Tanugi, J. ; Conrad, Jan ; Cutini, S. ; Dermer, C. D. ; de Palma, F. ; do Couto e Silva, E. ; Drell, P. S. ; Dubois, R. ; Dumora, D. ; Favuzzi, C. ; Fegan, S. J. ; Ferrara, E. C. ; Focke, W. B. ; Fortin, P. ; Frailis, M. ; Fuhrmann, L. ; Fukazawa, Y. ; Funk, S. ; Fusco, P. ; Gargano, F. ; Gasparrini, D. ; Gehrels, N. ; Germani, S. ; Giglietto, N. ; Giordano, F. ; Giroletti, M. ; Glanzman, T. ; Godfrey, G. ; Grenier, I. A. ; Guillemot, L. ; Guiriec, S. ; Hayashida, M. ; Hays, E. ; Horan, D. ; Hughes, R. E. ; Johannesson, G. ; Johnson, A. S. ; Johnson, W. N. ; Kadler, M. ; Kamae, T. ; Katagiri, H. ; Kataoka, J. ; Knoedlseder, J. ; Kuss, M. ; Lande, J. ; Latronico, L. ; Lee, S. -H. ; Lemoine-Goumard, M. ; Longo, F. ; Loparco, F. ; Lott, B. ; Lovellette, M. N. ; Lubrano, P. ; Madejski, G. M. ; Makeev, A. ; Max-Moerbeck, W. ; Mazziotta, Mario Nicola ; McEnery, J. E. ; Mehault, J. ; Michelson, P. F. ; Mitthumsiri, W. ; Mizuno, T. ; Moiseev, A. A. ; Monte, C. ; Monzani, M. E. ; Morselli, A. ; Moskalenko, I. V. ; Murgia, S. ; Naumann-Godo, M. ; Nishino, S. ; Nolan, P. L. ; Norris, J. P. ; Nuss, E. ; Ohsugi, T. ; Okumura, A. ; Omodei, N. ; Orlando, E. ; Ormes, J. F. ; Paneque, D. ; Panetta, J. H. ; Parent, D. ; Pavlidou, V. ; Pearson, T. J. ; Pelassa, V. ; Pepe, M. ; Pesce-Rollins, M. ; Piron, F. ; Porter, T. A. ; Raino, S. ; Rando, R. ; Razzano, M. ; Readhead, A. ; Reimer, A. ; Reimer, O. ; Richards, J. L. ; Ripken, J. ; Ritz, S. ; Roth, M. ; Sadrozinski, H. F. -W. ; Sanchez, D. ; Sander, A. ; Scargle, J. D. ; Sgro, C. ; Siskind, E. J. ; Smith, P. D. ; Spandre, G. ; Spinelli, P. ; Stawarz, L. ; Stevenson, M. ; Strickman, M. S. ; Sokolovsky, K. V. ; Suson, D. J. ; Takahashi, H. ; Takahashi, T. ; Tanaka, T. ; Thayer, J. B. ; Thayer, J. G. ; Thompson, D. J. ; Tibaldo, L. ; Torres, F. ; Tosti, G. ; Tramacere, A. ; Uchiyama, Y. ; Usher, T. L. ; Vandenbroucke, J. ; Vasileiou, V. ; Vilchez, N. ; Vitale, V. ; Waite, A. P. ; Wang, P. ; Wehrle, A. E. ; Winer, B. L. ; Wood, K. S. ; Yang, Z. ; Ylinen, T. ; Zensus, J. A. ; Ziegler, M. ; Aleksic, J. ; Antonelli, L. A. ; Antoranz, P. ; Backes, Michael ; Barrio, J. A. ; Gonzalez, J. Becerra ; Bednarek, W. ; Berdyugin, A. ; Berger, K. ; Bernardini, E. ; Biland, A. ; Blanch Bigas, O. ; Bock, R. K. ; Boller, A. ; Bonnoli, G. ; Bordas, Pol ; Tridon, D. Borla ; Bosch-Ramon, Valentin ; Bose, D. ; Braun, I. ; Bretz, T. ; Camara, M. ; Carmona, E. ; Carosi, A. ; Colin, P. ; Colombo, E. ; Contreras, J. L. ; Cortina, J. ; Covino, S. ; Dazzi, F. ; de Angelis, A. ; del Pozo, E. De Cea ; De Lotto, B. ; De Maria, M. ; De Sabata, F. ; Mendez, C. Delgado ; Ortega, A. Diago ; Doert, M. ; Dominguez, A. ; Prester, Dijana Dominis ; Dorner, D. ; Doro, M. ; Elsaesser, D. ; Ferenc, D. ; Fonseca, M. V. ; Font, L. ; Lopen, R. J. Garcia ; Garczarczyk, M. ; Gaug, M. ; Giavitto, G. ; Godinovi, N. ; Hadasch, D. ; Herrero, A. ; Hildebrand, D. ; Hoehne-Moench, D. ; Hose, J. ; Hrupec, D. ; Jogler, T. ; Klepser, S. ; Kraehenbuehl, T. ; Kranich, D. ; Krause, J. ; La Barbera, A. ; Leonardo, E. ; Lindfors, E. ; Lombardi, S. ; Lopez, M. ; Lorenz, E. ; Majumdar, P. ; Makariev, E. ; Maneva, G. ; Mankuzhiyil, N. ; Mannheim, K. ; Maraschi, L. ; Mariotti, M. ; Martinez, M. ; Mazin, D. ; Meucci, M. ; Miranda, J. M. ; Mirzoyan, R. ; Miyamoto, H. ; Moldon, J. ; Moralejo, A. ; Nieto, D. ; Nilsson, K. ; Orito, R. ; Oya, I. ; Paoletti, R. ; Paredes, J. M. ; Partini, S. ; Pasanen, M. ; Pauss, F. ; Pegna, R. G. ; Perez-Torres, M. A. ; Persic, M. ; Peruzzo, J. ; Pochon, J. ; Moroni, P. G. Prada ; Prada, F. ; Prandini, E. ; Puchades, N. ; Puljak, I. ; Reichardt, T. ; Reinthal, R. ; Rhode, W. ; Ribo, M. ; Rico, J. ; Rissi, M. ; Ruegamer, S. ; Saggion, A. ; Saito, K. ; Saito, T. Y. ; Salvati, M. ; Sanchez-Conde, M. ; Satalecka, K. ; Scalzotto, V. ; Scapin, V. ; Schultz, C. ; Schweizer, T. ; Shayduk, M. ; Shore, S. N. ; Sierpowska-Bartosik, A. ; Sillanpaa, A. ; Sitarek, J. ; Sobczynska, D. ; Spanier, F. ; Spiro, S. ; Stamerra, A. ; Steinke, B. ; Storz, J. ; Strah, N. ; Struebig, J. C. ; Suric, T. ; Takalo, L. O. ; Tavecchio, F. ; Temnikov, P. ; Terzic, T. ; Tescaro, D. ; Teshima, M. ; Vankov, H. ; Wagner, R. M. ; Weitzel, Q. ; Zabalza, V. ; Zandanel, F. ; Zanin, R. ; Acciari, V. A. ; Arlen, T. ; Aune, T. ; Benbow, W. ; Boltuch, D. ; Bradbury, S. M. ; Buckley, J. H. ; Bugaev, V. ; Cannon, A. ; Cesarini, A. ; Ciupik, L. ; Cui, W. ; Dickherber, R. ; Errando, M. ; Falcone, A. ; Finley, J. P. ; Finnegan, G. ; Fortson, L. ; Furniss, A. ; Galante, N. ; Gall, D. ; Gillanders, G. H. ; Godambe, S. ; Grube, J. ; Guenette, R. ; Gyuk, G. ; Hanna, D. ; Holder, J. ; Huang, D. ; Hui, C. M. ; Humensky, T. B. ; Kaaret, P. ; Karlsson, N. ; Kertzman, M. ; Kieda, D. ; Konopelko, A. ; Krawczynski, H. ; Krennrich, F. ; Lang, M. J. ; Maier, G. ; McArthur, S. ; McCann, A. ; McCutcheon, M. ; Moriarty, P. ; Mukherjee, R. ; Ong, R. ; Otte, N. ; Pandel, D. ; Perkins, J. S. ; Pichel, A. ; Pohl, M. ; Quinn, J. ; Ragan, K. ; Reyes, L. C. ; Reynolds, P. T. ; Roache, E. ; Rose, H. J. ; Rovero, A. C. ; Schroedter, M. ; Sembroski, G. H. ; Senturk, G. D. ; Steele, D. ; Swordy, S. P. ; Tesic, G. ; Theiling, M. ; Thibadeau, S. ; Varlotta, A. ; Vincent, S. ; Wakely, S. P. ; Ward, J. E. ; Weekes, T. C. ; Weinstein, A. ; Weisgarber, T. ; Williams, D. A. ; Wood, M. ; Zitzer, B. ; Villata, M. ; Raiteri, C. M. ; Aller, H. D. ; Aller, M. F. ; Arkharov, A. A. ; Blinov, D. A. ; Calcidese, P. ; Chen, W. P. ; Efimova, N. V. ; Kimeridze, G. ; Konstantinova, T. S. ; Kopatskaya, E. N. ; Koptelova, E. ; Kurtanidze, O. M. ; Kurtanidze, S. O. ; Lahteenmaki, A. ; Larionov, V. M. ; Larionova, E. G. ; Larionova, L. V. ; Ligustri, R. ; Morozova, D. A. ; Nikolashvili, M. G. ; Sigua, L. A. ; Troitsky, I. S. ; Angelakis, E. ; Capalbi, M. ; Carraminana, A. ; Carrasco, L. ; Cassaro, P. ; de la Fuente, E. ; Gurwell, M. A. ; Kovalev, Y. Y. ; Kovalev, Yu. A. ; Krichbaum, T. P. ; Krimm, H. A. ; Leto, Paolo ; Lister, M. L. ; Maccaferri, G. ; Moody, J. W. ; Mori, Y. ; Nestoras, I. ; Orlati, A. ; Pagani, C. ; Pace, C. ; Pearson, R. ; Perri, M. ; Piner, B. G. ; Pushkarev, A. B. ; Ros, E. ; Sadun, A. C. ; Sakamoto, T. ; Tornikoski, M. ; Yatsu, Y. ; Zook, A.
We report on the gamma-ray activity of the blazar Mrk 501 during the first 480 days of Fermi operation. We find that the average Large Area Telescope (LAT) gamma-ray spectrum of Mrk 501 can be well described by a single power-law function with a photon index of 1.78 +/- 0.03. While we observe relatively mild flux variations with the Fermi-LAT (within less than a factor of two), we detect remarkable spectral variability where the hardest observed spectral index within the LAT energy range is 1.52 +/- 0.14, and the softest one is 2.51 +/- 0.20. These unexpected spectral changes do not correlate with the measured flux variations above 0.3 GeV. In this paper, we also present the first results from the 4.5 month long multifrequency campaign (2009 March 15-August 1) on Mrk 501, which included the Very Long Baseline Array (VLBA), Swift, RXTE, MAGIC, and VERITAS, the F-GAMMA, GASP-WEBT, and other collaborations and instruments which provided excellent temporal and energy coverage of the source throughout the entire campaign. The extensive radio to TeV data set from this campaign provides us with the most detailed spectral energy distribution yet collected for this source during its relatively low activity. The average spectral energy distribution of Mrk 501 is well described by the standard one-zone synchrotron self-Compton (SSC) model. In the framework of this model, we find that the dominant emission region is characterized by a size less than or similar to 0.1 pc (comparable within a factor of few to the size of the partially resolved VLBA core at 15-43 GHz), and that the total jet power (similar or equal to 10(44) erg s(-1)) constitutes only a small fraction (similar to 10(-3)) of the Eddington luminosity. The energy distribution of the freshly accelerated radiating electrons required to fit the time-averaged data has a broken power-law form in the energy range 0.3 GeV-10 TeV, with spectral indices 2.2 and 2.7 below and above the break energy of 20 GeV. We argue that such a form is consistent with a scenario in which the bulk of the energy dissipation within the dominant emission zone of Mrk 501 is due to relativistic, proton-mediated shocks. We find that the ultrarelativistic electrons and mildly relativistic protons within the blazar zone, if comparable in number, are in approximate energy equipartition, with their energy dominating the jet magnetic field energy by about two orders of magnitude.
Furniss, A. ; Noda, K. ; Boggs, S. ; Chiang, J. ; Christensen, F. ; Craig, W. ; Giommi, P. ; Hailey, C. ; Harisson, F. ; Madejski, G. ; Nalewajko, K. ; Perri, M. ; Stern, D. ; Urry, M. ; Verrecchia, F. ; Zhang, W. ; Ahnen, M. L. ; Ansoldi, S. ; Antonelli, L. A. ; Antoranz, P. ; Babic, A. ; Banerjee, B. ; Bangale, P. ; de Almeida, U. Barres ; Barrio, J. A. ; Becerra Gonzalez, J. ; Bednarek, W. ; Bernardini, E. ; Biasuzzi, B. ; Biland, A. ; Blanch Bigas, O. ; Bonnefoy, S. ; Bonnoli, G. ; Borracci, F. ; Bretz, T. ; Carmona, E. ; Carosi, A. ; Chatterjee, A. ; Clavero, R. ; Colin, P. ; Colombo, E. ; Contreras, J. L. ; Cortina, J. ; Covino, S. ; Da Vela, P. ; Dazzi, F. ; De Angelis, A. ; De Caneva, G. ; De Lotto, B. ; de Ona Wilhelmi, E. ; Delgado Mendez, C. ; Di Pierro, F. ; Prester, Dijana Dominis ; Dorner, D. ; Doro, M. ; Einecke, S. ; Eisenacher Glawion, D. ; Elsaesser, D. ; Fernandez-Barral, A. ; Fidalgo, D. ; Fonseca, M. V. ; Font, L. ; Frantzen, K. ; Fruck, C. ; Galindo, D. ; Garcia Lopez, R. J. ; Garczarczyk, M. ; Garrido Terrats, D. ; Gaug, M. ; Giammaria, P. ; Godinovic, N. ; Gonzalez Munoz, A. ; Guberman, D. ; Hanabata, Y. ; Hayashida, M. ; Herrera, J. ; Hose, J. ; Hrupec, D. ; Hughes, G. ; Idec, W. ; Kellermann, H. ; Kodani, K. ; Konno, Y. ; Kubo, H. ; Kushida, J. ; La Barbera, A. ; Lelas, D. ; Lewandowska, N. ; Lindfors, E. ; Lombardi, S. ; Longo, F. ; Lopez, M. ; Lopez-Coto, R. ; Lopez-Oramas, A. ; Lorenz, E. ; Majumdar, P. ; Makariev, M. ; Mallot, K. ; Maneva, G. ; Manganaro, M. ; Mannheim, K. ; Maraschi, L. ; Marcote, B. ; Mariotti, M. ; Martinez, M. ; Mazin, D. ; Menzel, U. ; Miranda, J. M. ; Mirzoyan, R. ; Moralejo, A. ; Nakajima, D. ; Neustroev, V. ; Niedzwiecki, A. ; Nievas Rosillo, M. ; Nilsson, K. ; Nishijima, K. ; Orito, R. ; Overkemping, A. ; Paiano, S. ; Palacio, J. ; Palatiello, M. ; Paneque, D. ; Paoletti, R. ; Paredes, J. M. ; Paredes-Fortuny, X. ; Persic, M. ; Poutanen, J. ; Moroni, P. G. Prada ; Prandini, E. ; Puljak, I. ; Reinthal, R. ; Rhode, W. ; Ribo, M. ; Rico, J. ; Garcia, J. Rodriguez ; Saito, T. ; Saito, K. ; Satalecka, K. ; Scapin, V. ; Schultz, C. ; Schweizer, T. ; Shore, S. N. ; Sillanpaa, A. ; Sitarek, J. ; Snidaric, I. ; Sobczynska, D. ; Stamerra, A. ; Steinbring, T. ; Strzys, M. ; Takalo, L. ; Takami, H. ; Tavecchio, F. ; Temnikov, P. ; Terzic, T. ; Tescaro, D. ; Teshima, M. ; Thaele, J. ; Torres, D. F. ; Toyama, T. ; Treves, A. ; Verguilov, V. ; Vovk, I. ; Will, M. ; Zanin, R. ; Archer, A. ; Benbow, W. ; Bird, R. ; Biteau, Jonathan ; Bugaev, V. ; Cardenzana, J. V. ; Cerruti, M. ; Chen, Xuhui ; Ciupik, L. ; Connolly, M. P. ; Cui, W. ; Dickinson, H. J. ; Dumm, J. ; Eisch, J. D. ; Falcone, A. ; Feng, Q. ; Finley, J. P. ; Fleischhack, H. ; Fortin, P. ; Fortson, L. ; Gerard, L. ; Gillanders, G. H. ; Griffin, S. ; Griffiths, S. T. ; Grube, J. ; Gyuk, G. ; Hakansson, Nils ; Holder, J. ; Humensky, T. B. ; Johnson, C. A. ; Kaaret, P. ; Kertzman, M. ; Kieda, D. ; Krause, M. ; Krennrich, F. ; Lang, M. J. ; Lin, T. T. Y. ; Maier, G. ; McArthur, S. ; McCann, A. ; Meagher, K. ; Moriarty, P. ; Mukherjee, R. ; Nieto, D. ; Ong, R. A. ; Park, N. ; Petry, D. ; Pohl, Martin ; Popkow, A. ; Ragan, K. ; Ratliff, G. ; Reyes, L. C. ; Reynolds, P. T. ; Richards, G. T. ; Roache, E. ; Santander, M. ; Sembroski, G. H. ; Shahinyan, K. ; Staszak, D. ; Telezhinsky, Igor O. ; Tucci, J. V. ; Tyler, J. ; Vassiliev, V. V. ; Wakely, S. P. ; Weiner, O. M. ; Weinstein, A. ; Wilhelm, Alina ; Williams, D. A. ; Zitzer, B. ; Vince, O. ; Fuhrmann, L. ; Angelakis, E. ; Karamanavis, V. ; Myserlis, I. ; Krichbaum, T. P. ; Zensus, J. A. ; Ungerechts, H. ; Sievers, A. ; Bachev, R. ; Boettcher, Markus ; Chen, W. P. ; Damljanovic, G. ; Eswaraiah, C. ; Guver, T. ; Hovatta, T. ; Hughes, Z. ; Ibryamov, S. I. ; Joner, M. D. ; Jordan, B. ; Jorstad, S. G. ; Joshi, M. ; Kataoka, J. ; Kurtanidze, O. M. ; Kurtanidze, S. O. ; Lahteenmaki, A. ; Latev, G. ; Lin, H. C. ; Larionov, V. M. ; Mokrushina, A. A. ; Morozova, D. A. ; Nikolashvili, M. G. ; Raiteri, C. M. ; Ramakrishnan, V. ; Readhead, A. C. R. ; Sadun, A. C. ; Sigua, L. A. ; Semkov, E. H. ; Strigachev, A. ; Tammi, J. ; Tornikoski, M. ; Troitskaya, Y. V. ; Troitsky, I. S. ; Villata, M.
We report on simultaneous broadband observations of the TeV-emitting blazar Markarian 501 between 2013 April 1 and August 10, including the first detailed characterization of the synchrotron peak with Swift and NuSTAR. During the campaign, the nearby BL Lac object was observed in both a quiescent and an elevated state. The broadband campaign includes observations with NuSTAR, MAGIC, VERITAS, the Fermi Large Area Telescope, Swift X-ray Telescope and UV Optical Telescope, various ground-based optical instruments, including the GASP-WEBT program, as well as radio observations by OVRO, Metsahovi, and the F-Gamma consortium. Some of the MAGIC observations were affected by a sand layer from the Saharan desert, and had to be corrected using event-by-event corrections derived with a Light Detection and Ranging (LIDAR) facility. This is the first time that LIDAR information is used to produce a physics result with Cherenkov Telescope data taken during adverse atmospheric conditions, and hence sets a precedent for the current and future ground-based gamma-ray instruments. The NuSTAR instrument provides unprecedented sensitivity in hard X-rays, showing the source to display a spectral energy distribution (SED) between 3 and 79 keV consistent with a log-parabolic spectrum and hard X-ray variability on hour timescales. None (of the four extended NuSTAR observations) show evidence of the onset of inverse-Compton emission at hard X-ray energies. We apply a single-zone equilibrium synchrotron self-Compton (SSC) model to five simultaneous broadband SEDs. We find that the SSC model can reproduce the observed broadband states through a decrease in the magnetic field strength coinciding with an increase in the luminosity and hardness of the relativistic leptons responsible for the high-energy emission.
Discovery of very high energy gamma-ray emission from the BL Lacertae
object PKS0301-243 with HESS
(2013)
Abramowski, Attila ; Acero, F. ; Aharonian, Felix A. ; Benkhali, Faical Ait ; Akhperjanian, A. G. ; Angüner, Ekrem Oǧuzhan ; Anton, Gisela ; Balenderan, Shangkari ; Balzer, Arnim ; Barnacka, Anna ; Becherini, Yvonne ; Tjus, J. Becker ; Bernlöhr, K. ; Birsin, E. ; Bissaldi, E. ; Biteau, Jonathan ; Boettcher, Markus ; Boisson, Catherine ; Bolmont, J. ; Bordas, Pol ; Brucker, J. ; Brun, Francois ; Brun, Pierre ; Bulik, Tomasz ; Carrigan, Svenja ; Casanova, Sabrina ; Cerruti, M. ; Chadwick, Paula M. ; Chalme-Calvet, R. ; Chaves, Ryan C. G. ; Cheesebrough, A. ; Chretien, M. ; Colafrancesco, Sergio ; Cologna, Gabriele ; Conrad, Jan ; Couturier, C. ; Dalton, M. ; Daniel, M. K. ; Davids, I. D. ; Degrange, B. ; Deil, C. ; deWilt, P. ; Dickinson, H. J. ; Djannati-Ataï, A. ; Domainko, W. ; Drury, L. O&rsquo ; C. ; Dubus, G. ; Dutson, K. ; Dyks, J. ; Dyrda, M. ; Edwards, T. ; Egberts, Kathrin ; Eger, P. ; Espigat, P. ; Farnier, C. ; Fegan, S. ; Feinstein, F. ; Fernandes, M. V. ; Fernandez, D. ; Fiasson, A. ; Fontaine, G. ; Foerster, A. ; Fuessling, M. ; Gajdus, M. ; Gallant, Y. A. ; Garrigoux, T. ; Giebels, B. ; Glicenstein, J. F. ; Grondin, M. -H. ; Grudzinska, M. ; Haeffner, S. ; Hague, J. D. ; Hahn, J. ; Harris, J. ; Heinzelmann, G. ; Henri, G. ; Hermann, G. ; Hervet, O. ; Hillert, A. ; Hinton, James Anthony ; Hofmann, W. ; Hofverberg, P. ; Holler, M. ; Horns, D. ; Jacholkowska, A. ; Jahn, C. ; Jamrozy, M. ; Janiak, M. ; Jankowsky, F. ; Jung, I. ; Kastendieck, M. A. ; Katarzynski, K. ; Katz, U. ; Kaufmann, S. ; Khelifi, B. ; Kieffer, M. ; Klepser, S. ; Klochkov, D. ; Kluzniak, W. ; Kneiske, T. ; Kolitzus, D. ; Komin, Nu. ; Kosack, K. ; Krakau, S. ; Krayzel, F. ; Krueger, P. P. ; Laffon, H. ; Lamanna, G. ; Lefaucheur, J. ; Lemoine-Goumard, M. ; Lenain, J. -P. ; Lennarz, D. ; Lohse, T. ; Lopatin, A. ; Lu, C. -C. ; Marandon, V. ; Marcowith, Alexandre ; Marx, R. ; Maurin, G. ; Maxted, N. ; Mayer, M. ; McComb, T. J. L. ; Medina, M. C. ; Mehault, J. ; Menzler, U. ; Meyer, M. ; Moderski, R. ; Mohamed, M. ; Moulin, Emmanuel ; Murach, T. ; Naumann, C. L. ; de Naurois, M. ; Nedbal, D. ; Niemiec, J. ; Nolan, S. J. ; Oakes, L. ; Ohm, S. ; Wilhelmi, E. de Ona ; Opitz, B. ; Ostrowski, M. ; Oya, I. ; Panter, M. ; Parsons, R. D. ; Arribas, M. Paz ; Pekeur, N. W. ; Pelletier, G. ; Perez, J. ; Petrucci, P. -O. ; Peyaud, B. ; Pita, S. ; Poon, H. ; Puehlhofer, G. ; Punch, M. ; Quirrenbach, A. ; Raab, S. ; Raue, M. ; Reimer, A. ; Reimer, O. ; Renaud, M. ; de los Reyes, R. ; Rieger, F. ; Rob, L. ; Rosier-Lees, S. ; Rowell, G. ; Rudak, B. ; Rulten, C. B. ; Sahakian, V. ; Sanchez, David M. ; Santangelo, Andrea ; Schlickeiser, R. ; Schuessler, F. ; Schulz, A. ; Schwanke, U. ; Schwarzburg, S. ; Schwemmer, S. ; Sol, H. ; Spengler, G. ; Spies, F. ; Stawarz, L. ; Steenkamp, R. ; Stegmann, Christian ; Stinzing, F. ; Stycz, K. ; Sushch, Iurii ; Szostek, A. ; Tavernet, J. -P. ; Terrier, R. ; Tluczykont, M. ; Trichard, C. ; Valerius, K. ; van Eldik, C. ; Vasileiadis, G. ; Venter, C. ; Viana, A. ; Vincent, P. ; Voelk, H. J. ; Volpe, F. ; Vorster, M. ; Wagner, S. J. ; Wagner, P. ; Ward, M. ; Weidinger, M. ; Weitzel, Q. ; White, R. ; Wierzcholska, A. ; Willmann, P. ; Woernlein, A. ; Wouters, D. ; Zacharias, M. ; Zajczyk, A. ; Zdziarski, A. A. ; Zech, Alraune ; Zechlin, H. -S.
The active galactic nucleus PKS 0301-243 (z = 0.266) is a high-synchrotron-peaked BL Lac object that is detected at high energies (HE, 100 MeV < E < 100 GeV) by Fermi/LAT. This paper reports on the discovery of PKS 0301-243 at very high energies (E > 100 GeV) by the High Energy Stereoscopic System (H.E.S.S.) from observations between September 2009 and December 2011 for a total live time of 34.9 h. Gamma rays above 200 GeV are detected at a significance of 9.4 sigma. A hint of variability at the 2.5 sigma level is found. An integral flux I(E > 200GeV) = (3.3 +/- 1.1(stat) +/- 0.7(syst)) x 10(-12) ph cm(-2) s(-1) and a photon index Gamma = 4.6 +/- 0.7(stat) +/- 0.2(syst) are measured. Multi-wavelength light curves in HE, X-ray and optical bands show strong variability, and a minimal variability timescale of eight days is estimated from the optical light curve. A single-zone leptonic synchrotron self-Compton scenario satisfactorily reproduces the multi-wavelength data. In this model, the emitting region is out of equipartition and the jet is particle dominated. Because of its high redshift compared to other sources observed at TeV energies, the very high energy emission from PKS 0301-243 is attenuated by the extragalactic background light (EBL) and the measured spectrum is used to derive an upper limit on the opacity of the EBL.
Archambault, S. ; Archer, A. ; Barnacka, Anna ; Behera, B. ; Beilicke, M. ; Benbow, W. ; Berger, K. ; Bird, R. ; Böttcher, Markus ; Buckley, J. H. ; Bugaev, V. ; Cardenzana, J. V. ; Cerruti, M. ; Chen, Xuhui ; Christiansen, J. L. ; Ciupik, L. ; Collins-Hughes, E. ; Connolly, M. P. ; Cui, W. ; Dickinson, H. J. ; Dumm, J. ; Eisch, J. D. ; Errando, M. ; Falcone, A. ; Federici, Simone ; Feng, Q. ; Finley, J. P. ; Fleischhack, H. ; Fortson, L. ; Furniss, A. ; Gillanders, G. H. ; Godambe, S. ; Griffin, S. ; Griffiths, S. T. ; Grube, J. ; Gyuk, G. ; Hakansson, Nils ; Hanna, D. ; Holder, J. ; Hughes, G. ; Johnson, C. A. ; Kaaret, P. ; Kar, P. ; Kertzman, M. ; Khassen, Y. ; Kieda, D. ; Krawczynski, H. ; Kumar, S. ; Lang, M. J. ; Madhavan, A. S. ; Maier, G. ; McArthur, S. ; McCann, A. ; Meagher, K. ; Millis, J. ; Moriarty, P. ; Nelson, T. ; Nieto, D. ; Ong, R. A. ; Otte, A. N. ; Park, N. ; Perkins, J. S. ; Pohl, Martin ; Popkow, A. ; Prokoph, H. ; Pueschel, Elisa ; Quinn, J. ; Ragan, K. ; Rajotte, J. ; Reyes, L. C. ; Reynolds, P. T. ; Richards, G. T. ; Roache, E. ; Sembroski, G. H. ; Shahinyan, K. ; Smith, A. W. ; Staszak, D. ; Sweeney, K. ; Telezhinsky, Igor O. ; Tucci, J. V. ; Tyler, J. ; Varlotta, A. ; Vassiliev, V. V. ; Wakely, S. P. ; Welsing, R. ; Wilhelm, Alina ; Williams, D. A. ; Zitzer, B.
Aliu, E. ; Archambault, S. ; Arlen, T. ; Aune, T. ; Behera, B. ; Beilicke, M. ; Benbow, W. ; Berger, K. ; Bird, R. ; Bouvier, A. ; Buckley, J. H. ; Bugaev, V. ; Byrum, K. ; Cerruti, M. ; Chen, Xuhui ; Ciupik, L. ; Connolly, M. P. ; Cui, W. ; Duke, C. ; Dumm, J. ; Errando, M. ; Falcone, A. ; Federici, S. ; Feng, Q. ; Finley, J. P. ; Fleischhack, H. ; Fortin, P. ; Fortson, L. ; Furniss, A. ; Galante, N. ; Gillanders, G. H. ; Griffin, S. ; Griffiths, S. T. ; Grube, J. ; Gyuk, G. ; Hanna, D. ; Holder, J. ; Hughes, G. ; Humensky, T. B. ; Johnson, C. A. ; Kaaret, P. ; Kertzman, M. ; Khassen, Y. ; Kieda, D. ; Krawczynski, H. ; Krennrich, F. ; Lang, M. J. ; Madhavan, A. S. ; Maier, G. ; Majumdar, P. ; McArthur, S. ; McCann, A. ; Meagher, K. ; Millis, J. ; Moriarty, P. ; Mukherjee, R. ; Nieto, D. ; Ong, R. A. ; Otte, A. N. ; Park, N. ; Perkins, J. S. ; Pohl, M. ; Popkow, A. ; Prokoph, H. ; Quinn, J. ; Ragan, K. ; Reyes, L. C. ; Reynolds, P. T. ; Richards, G. T. ; Roache, E. ; Sembroski, G. H. ; Smith, A. W. ; Staszak, D. ; Telezhinsky, Igor O. ; Theiling, M. ; Varlotta, A. ; Vassiliev, V. V. ; Vincent, S. ; Wakely, S. P. ; Weekes, T. C. ; Weinstein, A. ; Welsing, R. ; Williams, D. A. ; Zajczyk, A. ; Zitzer, B.
- 1 to 10