Recently Wo\'zniak \& Stanek (1996) proposed a new method to investigate interstellar extinction, based on two band photometry, which uses red clump stars as a means to construct the reddening curve. I apply this method to the color-magnitude diagrams obtained by the Optical Gravitational Lensing Experiment (OGLE) to construct an extinction map of (40′)2 region of Baade's Window, with resolution of ∼30arcsec. Such a map should be useful for studies of this frequently observed region of the Galactic bulge. The map and software useful for its applications are available via {\tt anonymous ftp}. The total extinction AV varies from 1.26mag to 2.79mag within the (40′)2 field of view centered on (α2000,δ2000)= (18:03:20.9,--30:02:06), i.e. (l,b)=(1.001,−3.885). The ratio AV/E(V−I)=2.49±0.02 is determined with this new method.
@article{arxiv.astro-ph/9512137,
title = {Extinction Map of Baade's Window},
author = {K. Z. Stanek},
journal= {arXiv preprint arXiv:astro-ph/9512137},
year = {2009}
}
Comments
revised version accepted for publication in ApJ Letters, 8 pages, uuencoded PostScript with 4 figures included; complete paper available through WWW at http://www.astro.princeton.edu/~library/prep.html; tables and auxiliary software available at ftp://www.astro.princeton.edu/stanek/Extinction