> If it's V-filtered, he reported to AAVSO correctly; > if it's unfiltered, it should have been reported as "CCD": This illustrates the problem. If he had not reported to VSNET separatedly, no one would cast a doubt regarding his "CCDV" specification in AAVSO reports. There can be a number of similar (unnoticed) instances, who report "CCDV" observations for unfiltered CCD observations. The VSNET system explanation on http://www.kusastro.kyoto-u.ac.jp/vsnet/etc/format.html is more explanatory, and observers are recommended to consult this, too. Regards, Taichi Kato
vsnet-adm@kusastro.kyoto-u.ac.jp