The Zero Point of Extinction Toward Baade's Window From RR Lyrae Stars

Details The Zero Point of Extinction Toward Baade's Window From RR Lyrae Stars The Zero Point of Extinction Toward Baade's Window From RR Lyrae Stars

1997-06-30

arxiv.org/abs/astro-ph/9706292v1

Astronomy and Astrophysics

Astrophysics

Submitted to ApJ, 18 pages including figures

Scientific paper

10.1086/305206

We measure the zero point of the Stanek (1996) extinction map by comparing the observed (V-K) colors of 20 RR Lyrae stars (type ab) found in the MACHO survey with their intrinsic (V-K)_0 colors as a function of period as determined from nearby RR Lyrae stars. We find that the zero point of the Stanek map should be changed by \Delta A_V = -0.11 +/- 0.05 mag, in excellent agreement with the recent measurement of Gould, Popowski & Terndrup (1997) using K giants.

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