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. The equally high external accuracy of APASS photometry has been verified on secondary Landolt and Sloan photometric standard stars not involved in the APASS calibration process and on a large body of literature data on field and cluster stars, confirming the absence of offsets and trends. Compared with the Carlsberg Meridian Catalog (CMC-15), APASS astrometry of RAVE stars is accurate to a median value of 0.098 arcsec. Brightness distribution functions for the RAVE stars have been derived in all bands. APASS photometry of RAVE stars, augmented by 2MASS JHK infrared data, has been χ2 fitted to a densely populated synthetic photometric library designed to widely explore temperature, surface gravity, metallicity, and reddening. Resulting T eff and E B – V , computed over a range of options, are provided and discussed, and will be kept updated in response to future APASS and RAVE data releases. 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 = 0.036 ± 0.002 at the Galactic poles, is a suitable approximation of the actual reddening encountered at Galactic latitudes |b| ≥?25°.
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机译：我们提供了Landolt BV和Sloan g'r'i'波段的AAVSO光度全天候测量（APASS）光度，用于第四次RAVE数据发布中包含的所有425,743星。 RAVE恒星APASS光度法的内部精度表示为0.013、0.012、0.012、0.014和0.021，分别表示在四个不同的观测纪元的中位数上并在2009年至2013年之间分配并获得的数据平均值的误差。 mag分别代表B，V，g'，r'和i'波段。在未参与APASS校准过程的次生Landolt和Sloan光度标准恒星以及大量关于实地星团和星团恒星的文献数据中，已经验证了APASS光度法具有同样高的外部精度，这证实了没有偏移和趋势。与Carlsberg Meridian Catalog（CMC-15）相比，RAVE恒星的APASS天文测量精确到0.098 arcsec的中值。 RAVE星星的亮度分布函数已在所有波段中得出。 RAVE恒星的APASS光度法通过2MASS JHK红外数据得到增强，已被χ2拟合到人口稠密的合成光度库中，该库可广泛研究温度，表面重力，金属性和变红。提供并讨论了在一系列选项中计算出的结果T eff和E B – V，并将根据未来的APASS和RAVE数据版本进行更新。在此过程中，我们发现，由均匀的尘埃平板引起的变红，在银河平面的任一侧延伸140 pc，在银河两极造成的= 0.036±0.002，是在实际情况下遇到的实际变红的合适近似值。银河纬度| b | ≥？25°。
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