On photometric error assignment

Gaba_p · Posted: Mon Jun 11, 2012 6:39 pm Post subject: On photometric error assignment

In this thread the user CavasRNC says:

massey · Posted: Fri Jun 15, 2012 1:04 pm Post subject:

This isn't rocket science. In calculating the error on aperture photometry, you add the relative sources of error in quadrature: the read-noise, the photon noise front he object, and the photon noise from the sky. With PSF fitting it's a little bit trickier. This is all well documented in the various papers Peter Stetson has written on daophot. See, for example,
http://adsabs.harvard.edu/abs/1987PASP...99..191S
http://adsabs.harvard.edu/abs/1989HiA.....8..635S
http://adsabs.harvard.edu/abs/1990ccd2.proc...71S

Gaba_p · Posted: Fri Jun 15, 2012 3:42 pm Post subject:

Sadly, I don't have access to the last two of the three articles you posted Dr Massey.

I am actually performing PSF fitting, is there a reference for that or do the same articles by Stetson apply?

Thank you very much for your reply.

massey · Posted: Sat Jun 16, 2012 3:03 am Post subject:

Yes, these are about PSF fitting. Yes, two of the articles can't be found on-line, but you would have to try an astronomy library, where they have conference proceedings and observatory publications.