TY  - JOUR
A1  - Dominis, Dijana
A1  - Mimica, P.
A1  - Pavlovski, K.
A1  - Tamajo, E.
T1  - In between beta Lyrae and Algol : the case of V356 Sgr
N2  - The eclipsing binary system V356 Sgr is of considerable interest, since it is probably at the very end of its mass transfer phase, i.e. between beta Lyrae and Algol. Hence, the binary provides an opportunity to directly examine the exposed core of a star for signatures of nuclear burning, and to test stellar evolution models. The system is composed of an early B star accreting matter from a Roche-lobe filling A2 II star. Recently, with progress in the UV spectral region, significant revision of previous values for absolute parameters has been made. Therefore, we find it justified and important to present a new photometric solution. Our model is compared to an early disk model, and is discussed in the framework of mass transfer processes in this binary system
Y1  - 2005
SN  - 0004-640X
ER  - 
TY  - JOUR
A1  - Kubas, Daniel
A1  - Cassan, A.
A1  - Beaulieu, Jean-Philippe
A1  - Coutures, C.
A1  - Dominik, M.
A1  - Albrow, Michael D.
A1  - Brillant, Stephane
A1  - Caldwell, John A. R.
A1  - Dominis, Dijana
A1  - Donatowicz, J.
A1  - Fendt, Christian
A1  - Fouque, P.
A1  - Jorgensen, Uffe Grae
A1  - Greenhill, John
A1  - Hill, K.
A1  - Heinmüller, Janine
A1  - Horne, Keith
A1  - Kane, Stephen R.
A1  - Marquette, Jean-Baptiste
A1  - Martin, Ralph
A1  - Menzies, J. W.
A1  - Pollard, K. R.
A1  - Sahu, K. C.
A1  - Vinter, C.
A1  - Wambsganss, Joachim
A1  - Watson, R.
A1  - Williams, A.
A1  - Thurl, C.
T1  - Full characterization of binary-lens event OGLE-2002-BLG-069 from PLANET observations
N2  - We analyze the photometric data obtained by PLANET and OGLE on the caustic-crossing binary-lens microlensing event OGLE-2002-BLG-069. Thanks to the excellent photometric and spectroscopic coverage of the event, we are able to constrain the lens model up to the known ambiguity between close and wide binary lenses. The detection of annual parallax in combination with measurements of extended-source effects allows us to determine the mass, distance and velocity of the lens components for the competing models. While the model involving a close binary lens leads to a Bulge- Disc lens scenario with a lens mass of M = (0.51 ± 0.15) M-⊙ and distance of D-L = (2.9 ± 0.4) kpc, the wide binary lens solution requires a rather implausible binary black-hole lens ( M ≳ 126 M-⊙). Furthermore we compare current state-of-the-art numerical and empirical models for the surface brightness profile of the source, a G5III Bulge giant. We find that a linear limb-darkening model for the atmosphere of the source star is consistent with the data whereas a PHOENIX atmosphere model assuming LTE and with no free parameter does not match our observations
Y1  - 2005
SN  - 0004-6361
ER  -