%0 Journal Article
%T The Zero Point of Extinction Toward Baade's Window
%A Andrew Gould
%A Piotr Popowski
%A Donald M. Terndrup
%J Physics
%D 1997
%I arXiv
%R 10.1086/305062
%X We measure the zero point of the Stanek (1996) extinction map by comparing the observed (V-K) colors of 206 K giant stars with their intrinsic (V-K)_0 colors as derived from their H\beta indices. We find that the zero point of the Stanek map should be changed by \Delta A_V = -0.10 +/- 0.06 mag, obtaining as a bonus a three-fold reduction of the previous statistical error. The most direct way to test for systematic errors in this determination would be to conduct a parallel measurement based on the (V-K) colors of RR Lyraes (type ab).
%U http://arxiv.org/abs/astro-ph/9705020v1