Unfortunately I know almost nothing about photometry. You can find just about any catalog on Vizier, and convert them for CdC using CdC's catgen utility (see the "tools" section of the CdC download page, at least for v2.x).
-John --- "G. G." <[EMAIL PROTECTED]> wrote: > John, > > Thanks for responding. > > So, which catalogs (accessible through CDC) are photometric catalogs? > Also, if none is, are there good photometric catalogs on-line? > > Thanks, > Gennady > > --- In [email protected], John Mahony > <[EMAIL PROTECTED]> wrote: > > > > These were intended as astrometric catalogs, not photometric. To > quote from > > "read.pht", the readme file on the USNO's website for the > photometric data in > > the USNO-A1.0 catalog: > > > > ----------------------------------------- > > Summary: > > > > The photometric calibration of USNO-A1.0 is about as poor as one > can > > have and still claim that the magnitudes mean something. > > ..... > > -------------------------------------- > > > > -John > > > > > > > > --- "G. G." <[EMAIL PROTECTED]> wrote: > > > > > Often, I use catalogs USNO-A and USNO-B to identify faint stars. > > > However, on many occasions these catalogs do not agree. Often, > the > > > difference is quite large (1+ magnitudes). Does anyone know which > of > > > these catalogs is more accurate? > > > > > > Thanks, > > > Gennady > > > > > > > > > > > ______________________________________________________________________ > ______________ > > Never miss an email again! > > Yahoo! Toolbar alerts you the instant new Mail arrives. > > http://tools.search.yahoo.com/toolbar/features/mail/ > > > > > > > > Yahoo! Groups Links > > > > ____________________________________________________________________________________Ready for the edge of your seat? Check out tonight's top picks on Yahoo! TV. http://tv.yahoo.com/
