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Photometry - Coggle Diagram
Photometry
basic steps & methods
aperture photometry
photons belong to a source
background, mode counts
PSF photometry
fitting a PSF, good for crowded field
difference image photometry
extended source photometry
differential photometry
target star, comparison star
M_instrument, M_true
counts, exposure time
calculate SNR
noise
source and sky
estimate sky
dark current
read noise and digitization error
signal/sqrt(noise)
calibrate to magnitudes