The Zero Point of Extinction Toward Baade's Window
Astrophysics
2009-10-30 v1
Abstract
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).
Cite
@article{arxiv.astro-ph/9705020,
title = {The Zero Point of Extinction Toward Baade's Window},
author = {Andrew Gould and Piotr Popowski and Donald M. Terndrup},
journal= {arXiv preprint arXiv:astro-ph/9705020},
year = {2009}
}
Comments
10 pages, 1 figure