Limb-darkening measurements for a cool red giant in microlensing event OGLE 2004-BLG-482
- Zub, M.
- Cassan, A.
- Heyrovský, D.
- Fouqué, P.
- Stempels, H. C.
- Albrow, M. D.
- Beaulieu, J. -P.
- Brillant, S.
- Christie, G. W.
- Kains, N.
- Kozłowski, S.
- Kubas, D.
- Wambsganss, J.
- Batista, V.
- Bennett, D. P.
- Cook, K.
- Coutures, C.
- Dieters, S.
- Dominik, M.
- Dominis Prester, D.
- Donatowicz, J.
- Greenhill, J.
- Horne, K.
- Jørgensen, U. G.
- Kane, S. R.
- Marquette, J. -B.
- Martin, R.
- Menzies, J.
- Pollard, K. R.
- Sahu, K. C.
- Vinter, C.
- Williams, A.
- Gould, A.
- Depoy, D. L.
- Gal-Yam, A.
- Gaudi, B. S.
- Han, C.
- Lipkin, Y.
- Maoz, D.
- Ofek, E. O.
- Park, B. -G.
- Pogge, R. W.
- Mccormick, J.
- Udalski, A.
- Szymański, M. K.
- Kubiak, M.
- Pietrzyński, G.
- Soszyński, I.
- Szewczyk, O.
- Wyrzykowski, Ł.
DOIAbstract
International audience Aims: We present a detailed analysis of OGLE 2004-BLG-482, a relatively high-magnification single-lens microlensing event that exhibits clear extended-source effects. These events are relatively rare, but they potentially contain unique information on the stellar atmosphere properties of their source star, as shown in this study. Methods: Our dense photometric coverage of the overall light curve and a proper microlensing modelling allow us to derive measurements of the OGLE 2004-BLG-482source star's linear limb-darkening coefficients in three bands, including standard Johnson-Cousins I and R, as well as in a broad clear filter. In particular, we discuss in detail the problems of multi-band and multi-site modelling on...
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