SDSS photometric calibration

[dan_adrian]

Hello,
I took some images using Astrodon Sloan g' r' i' photometric filters. Can I use Prism to do photometric calibration?
In the Analysis->Photometry->Automatic calibration, I cannot find a catalog that contains sloan magnitudes

Thank you

[Marc DELDEM]

Have a look at the UCAC4 catalog.

https://irsa.ipac.caltech.edu/data/UCAC4/ucac4.html

UCAC4 is a compiled, all-sky star catalog covering mainly the 8 to 16 magnitude range in a single bandpass between V and R. [...] These data are supplemented by 2MASS photometric data for about 110 million stars and 5-band (B,V,g,r,i) photometry from the APASS (AAVSO Photometric All-Sky Survey) for over 50 million stars.

g,r,i from APASS catalog are g',r',i' Sloan filters.

From Prism:


From Aladin:


From VizieR:
http://vizier.cds.unistra.fr/viz-bin/Vi ... c.rs=0.004

[dan_adrian]

Thank you Marc.
So the GRI magnitudes bellow are sloan?

[Marc DELDEM]

So the GRI magnitudes bellow are sloan?

Yes I think so