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SDSS photometric calibration
Posté : 28 janv. 2024, 16:54
par 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
Re: SDSS photometric calibration
Posté : 29 janv. 2024, 09:13
par 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
Re: SDSS photometric calibration
Posté : 29 janv. 2024, 19:46
par dan_adrian
Thank you Marc.
So the GRI magnitudes bellow are sloan?
Re: SDSS photometric calibration
Posté : 30 janv. 2024, 21:51
par Marc DELDEM
dan_adrian a écrit : ↑29 janv. 2024, 19:46
So the GRI magnitudes bellow are sloan?
Yes I think so