标题： SDSS条带82标准星目录与盖亚EDR3的测光交叉校准，以及与Pan-STARRS1、DES、CFIS和GALEX目录的比较 显示英文标题

标题： Photometric Cross-Calibration of the SDSS Stripe 82 Standard Stars catalogue with Gaia EDR3, and Comparison with Pan-STARRS1, DES, CFIS and GALEX catalogues

摘要： 我们扩展了SDSS条带82标准星目录，加入了2007年后的SDSS成像数据。 此改进版本列出了近百万颗视星等r~22 mag的恒星的平均SDSS ugriz测光数据。 每颗恒星有2-3倍的测量次数，随机误差比原始目录小1.4-1.7倍，比单次SDSS运行的误差小约3倍。 新目录中的随机误差在u、g、r、i和z波段分别对于视星等更亮于20.0、21.0、21.0、20.5和19.0 mag的恒星约为< 0.01 mag。 我们通过使用Gaia早期数据发布3 (EDR3)的Gmag测光数据，作为SDSS目录中赤经和赤纬的函数，推导出灰度测光零点校正，并使用Gaia BP-RP颜色在ugiz波段相对于r波段推导出校正。 与Pan-STARRS1、DES、CFIS和GALEX调查进行测试后，重新校准的测光质量表明测光零点的空间变化不超过0.01 mag（RMS），赤经方向的典型值为3-7毫角秒，赤纬方向的典型值为1-2毫角秒，除了u波段的散射小于~6毫角秒。 我们还报告了这里考虑的其他调查中的一些次要测光问题，包括Gaia EDR3中16 < G_Gaia < 20范围内存在约0.01 mag的幅度依赖偏差。 我们新的、公开可用的目录提供了低于1%水平的ugriz测光稳健校准，并将在Vera C. Rubin天文台时空遗产调查的调试期间有所帮助。 显示英文摘要

摘要： We extend the SDSS Stripe 82 Standard Stars Catalog with post-2007 SDSS imaging data. This improved version lists averaged SDSS ugriz photometry for nearly a million stars brighter than r~22 mag. With 2-3x more measurements per star, random errors are 1.4-1.7x smaller than in the original catalog, and about 3x smaller than for individual SDSS runs. Random errors in the new catalog are ~< 0.01 mag for stars brighter than 20.0, 21.0, 21.0, 20.5, and 19.0 mag in u, g, r, i, and z-bands, respectively. We achieve this error threshold by using the Gaia Early Data Release 3 (EDR3) Gmag photometry to derive gray photometric zeropoint corrections, as functions of R.A. and Declination, for the SDSS catalog, and use the Gaia BP-RP colour to derive corrections in the ugiz bands, relative to the r-band. The quality of the recalibrated photometry, tested against Pan-STARRS1, DES, CFIS and GALEX surveys, indicates spatial variations of photometric zeropoints <=0.01 mag (RMS), with typical values of 3-7 millimag in the R.A., and 1-2 millimag in the Declination directions, except for <~6 millimag scatter in the u-band. We also report a few minor photometric problems with other surveys considered here, including a magnitude-dependent ~0.01 mag bias between 16 < G_Gaia < 20 in the Gaia EDR3. Our new, publicly available catalog offers robust calibration of ugriz photometry below 1% level, and will be helpful during the commissioning of the Vera C. Rubin Observatory Legacy Survey of Space and Time.