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SDSS ,2MASS,UKIDSS,SPITZER星等和AB星等的转换
文小庆 2012-11-4 14:46
SDSS是asinh星等 2MASS是Vega星等 mAB=mVega+conv conv的值见http://www.mattiavaccari.net/simstuff/simstuff05/node9.html
个人分类: SDSS|5822 次阅读|没有评论
星等系统
文小庆 2012-11-4 14:42
http://www.astro.umd.edu/~ssm/ASTR620/mags.html 星等系统介绍见网页,AB系统,和Vega系统,并有来源文献方便引用
个人分类: SDSS|3899 次阅读|没有评论
SDSS星等和AB星等的转换
文小庆 2012-9-6 11:24
The SDSS photometry is intended to be on the AB system (Oke Gunn 1983), by which a magnitude 0 object should have the same counts as a source of Fnu = 3631 Jy. However, this is known not to be exactly true, such that the photometric zeropoints are slightly off the AB standard. We continue to wor ...
个人分类: SDSS|8395 次阅读|没有评论
SDSS dr8数据的下载
文小庆 2012-7-6 22:41
1,http://skyserver.sdss3.org/CasJobs/注册帐号 2,登录进去,Import你的表格。可以是坐标,也可以是plate mjd fiberID, 逗号/空格/Tab分割的都行。必须带列名。 3,在query那里贴上命令。切记Context那里选dr8 Select L.ra,L.dec,L.petroMag_u,L.petroMag_g,L.petroMag_r,L.petroMag_i,L.petroMag_z,L.petroMa ...
个人分类: SDSS|3897 次阅读|没有评论

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