APASS LANDOLT-SLOAN BVgri PHOTOMETRY OF RAVE STARS. I. DATA, EFFECTIVE TEMPERATURES, AND REDDENINGS

We provide AAVSO Photometric All-Sky Survey (APASS) photometry in the Landolt BV and Sloan g r i bands for all 425, 743 stars included in the fourth RAVE Data Release. The internal accuracy of the APASS photometry of RAVE stars, expressed as the error of the mean of data obtained and separately calibrated over a median of four distinct observing epochs and distributed between 2009 and 2013, is 0.013, 0.012, 0.012, 0.014, and 0.021 mag for the B, V, g, r, and i bands, respectively. In the process, we find that the reddening caused by a homogeneous slab of dust, extending for 140 pc on either side of the Galactic plane and responsible for E poles B-V = 0.036 [+ or -] 0.002 at the Galactic poles, is a suitable approximation of the actual reddening encountered at Galactic latitudes [b] 25[degrees].