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Subject: [vsnet-chat 6342] Re: RS Ophiuchi ASAS-3 chart > Is this advisable? The sites says "In most cases photometry is accurate > to about 0.05 mag, but in many cases (due to the problems with > flatfielding and lack of color information) errors could be 0.1 mag. or > larger." > > I think I agree with the "0.1 mag. or larger " part (from my limited > experience). Michael, Every source has its problems. The key to this is analysing what to use and what to discard. It's not as easy as one would like it but you can't have it all.... The accuracy depends on the field and the brigthness. There are fields where in fact I had to abandon my attempts to make a sequence. But in most cases the accuracy is higher than 0.05 and what matters the most is that this is better than the previously available results. When photometry gives errors up to 0.4 mag, ASAS-3 data become a better choice. I am on your side on the "only-use-good-data" approach. Regards, Sebastian.
Return to the Powerful Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
