@article{AcciariArlenAuneetal.2014,
  author    = {Acciari, V. A. and Arlen, T. and Aune, T. and Benbow, W. and Bird, R. and Bouvier, A. and Bradbury, S. M. and Buckley, J. H. and Bugaev, V. and de la Calle Perez, I. and Carter-Lewis, D. A. and Cesarini, A. and Ciupik, L. and Collins-Hughes, E. and Connolly, M. P. and Cui, W. and Duke, C. and Dumm, J. and Falcone, A. and Federici, Simone and Fegan, D. J. and Fegan, S. J. and Finley, J. P. and Finnegan, G. and Fortson, L. and Gaidos, J. and Galante, N. and Gall, D. and Gibbs, K. and Gillanders, G. H. and Griffin, S. and Grube, J. and Gyuk, G. and Hanna, D. and Horan, D. and Humensky, T. B. and Kaaret, P. and Kertzman, M. and Khassen, Y. and Kieda, D. and Krawczynski, H. and Krennrich, F. and Lang, M. J. and McEnery, J. E. and Madhavan, A. S. and Moriarty, P. and Nelson, T. and Ong, R. A. and Orr, M. and Otte, A. N. and Perkins, J. S. and Petry, D. and Pichel, A. and Pohl, M. and Quinn, J. and Ragan, K. and Reynolds, T. and Roache, E. and Rovero, A. and Schroedter, M. and Sembroski, G. H. and Smith, A. and Telezhinsky, Igor O. and Theiling, M. and Toner, J. and Tyler, J. and Varlotta, A. and Vivier, M. and Wakely, S. P. and Ward, J. E. and Weekes, T. C. and Weinstein, A. and Welsing, R. and Williams, D. A. and Wissel, S.},
  title     = {Observation of Markarian 421 in TeV gamma rays over a 14-year time span},
  series = {Astroparticle physics},
  volume    = {54},
  journal   = {Astroparticle physics},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {0927-6505},
  doi       = {10.1016/j.astropartphys.2013.10.004},
  pages     = {1 -- 10},
  year      = {2014},
  abstract  = {The variability of the blazar Markarian 421 in TeV gamma rays over a 14-year time period has been explored with the Whipple 10 m telescope. It is shown that the dynamic range of its flux variations is large and similar to that in X-rays. A correlation between the X-ray and TeV energy bands is observed during some bright flares and when the complete data sets are binned on long timescales. The main database consists of 878.4 h of observation with the Whipple telescope, spread over 783 nights. The peak energy response of the telescope was 400 GeV with 20\% uncertainty. This is the largest database of any TeV-emitting active galactic nucleus (AGN) and hence was used to explore the variability profile of Markarian 421. The tithe-averaged flux from Markarian 421 over this period was 0.446 +/- 0.008 Crab flux units. The flux exceeded 10 Crab flux units on three separate occasions. For the 2000-2001 season the average flux reached 1.86 Crab units, while in the 1996-1997 season the average flux was only 0.23 Crab units.},
  language  = {en}
}
@article{SchechterWambsganssLewis2004,
  author    = {Schechter, P. L. and Wambsganss, Joachim and Lewis, G. F.},
  title     = {Qualitative aspects of quasar microlensing with two mass components : Magnification patterns and probability distributions},
  issn      = {0004-637X},
  year      = {2004},
  abstract  = {It has been conjectured that the distribution of magnifications of a point source microlensed by a randomly distributed population of intervening point masses is independent of its mass spectrum. We present gedanken experiments that cast doubt on this conjecture and numerical simulations that show it to be false},
  language  = {en}
}
@article{PugaAlcaldeBarrenaetal.2001,
  author    = {Puga, E. and Alcalde, D. and Barrena, R. and Mediavilla, E. and Motta, V. and Munoz, J. A. and Oscoz, Alejandro and Serra-Ricart, M. and Gil-Merino, Rodrigo and Goicoechea, Luis Julian and Lewis, G. f and Libbrecht, C. and Moreau, O. and Surdej, J. and Wambsganß, Joachim},
  title     = {Daily monitoring of the gravitational lens QSO 2237+0305 at the Nordic Optical Telescope},
  isbn      = {0-7923-6974-2},
  year      = {2001},
  language  = {en}
}
@article{SchulzeMakuchWagnerKounavesetal.2018,
  author    = {Schulze-Makuch, Dirk and Wagner, Dirk and Kounaves, Samuel P. and Mangelsdorf, Kai and Devine, Kevin G. and de Vera, Jean-Pierre and Schmitt-Kopplin, Philippe and Grossart, Hans-Peter and Parro, Victor and Kaupenjohann, Martin and Galy, Albert and Schneider, Beate and Airo, Alessandro and Froesler, Jan and Davila, Alfonso F. and Arens, Felix L. and Caceres, Luis and Cornejo, Francisco Solis and Carrizo, Daniel and Dartnell, Lewis and DiRuggiero, Jocelyne and Flury, Markus and Ganzert, Lars and Gessner, Mark O. and Grathwohl, Peter and Guan, Lisa and Heinz, Jacob and Hess, Matthias and Keppler, Frank and Maus, Deborah and McKay, Christopher P. and Meckenstock, Rainer U. and Montgomery, Wren and Oberlin, Elizabeth A. and Probst, Alexander J. and Saenz, Johan S. and Sattler, Tobias and Schirmack, Janosch and Sephton, Mark A. and Schloter, Michael and Uhl, Jenny and Valenzuela, Bernardita and Vestergaard, Gisle and Woermer, Lars and Zamorano, Pedro},
  title     = {Transitory microbial habitat in the hyperarid Atacama Desert},
  series = {Proceedings of the National Academy of Sciences of the United States of America},
  volume    = {115},
  journal   = {Proceedings of the National Academy of Sciences of the United States of America},
  number    = {11},
  publisher = {National Acad. of Sciences},
  address   = {Washington},
  issn      = {0027-8424},
  doi       = {10.1073/pnas.1714341115},
  pages     = {2670 -- 2675},
  year      = {2018},
  language  = {en}
}