Dear colleagues, Does anyone know a web page which shows a color conversion diagram or formula between 2MASS JHKs color and UBVRI color, or GSC2 JFN color and UBVRI color? For example, a diagram between 2MASS J-Ks and Johnson B-V, or between GSC2 J-F and Johnson B-V. On 2MASS color, I know the page: http://ftp.lowell.edu/pub/bas/starcats/uvby.calib is helpful. But I would like to see a diagram or conversion formula, too, if exists. On GSC2 color, I found "gsc2_johnson_kron_cousins.txt" in GOOGLE cache, but the original file is now not found... Thanks in advance, -- Seiichi Yoshida comet@aerith.net http://vsnet.aerith.net/
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