The Zero Point of Extinction toward Baade's Window from RR Lyrae Stars

Authors :: Alcock, C.
Allsman, R. A.
Alves, D. R.
Axelrod, T. S.
Becker, A. C.
Bennett, D. P.
Cook, K. H.
Freeman, K. C.
Griest, K.
Gould, A.
Guern, J. A.
Lehner, M. J.
Marshall, S. L.
Minniti, D.
Peterson, B. A.
Popowski, P.
Pratt, M. R.
Quinn, P. J.
Rodgers, A. W.
Stubbs, C. W.
Sutherland, W.
Vandehei, T.
Welch, D. L.
Source :: The Astrophysical Journal; February 1998, Vol. 494 Issue: 1 p396-399, 4p
Publication Year :: 1998
Abstract: We measure the zero point of the Stanek 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)0colors 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 ?AV= -0.11 ± 0.05 mag, in excellent agreement with the recent measurement of Gould, Popowski, & Terndrup using K giants.