Photometry Field Landolt SA98 Sloan?

See Smith, et al.

http://adsabs.harvard.edu/abs/2002AJ....123.2121S

for the main stars in each of their calibration fields, which were chosen to match Landolt.  Allyn has a website with more photometry.  Other than that, APASS DR9 will include grizY calibration of that field, but it won't be available for a couple of months.

Arne

Thanks Arne.

I am in dilemma whether to wait APASS or search site Allyn, I just need 34 stars of sa98.

here find what I said Arne.

here is the page with fields landolt sloan

http://www-star.fnal.gov/NorthEqExtension_ugriz/index.html

here's the file

http://www-star.fnal.gov/NorthEqExtension_ugriz/Data/usno40stds.clean.v…

there are also other fields in the south, even if others already had them.

http://www-star.fnal.gov/Southern_ugriz/New/index.html