MJD56251-g¶
Form of the Photometric Equation¶
g_std = -2.5log10(counts[ADU]/sec) - a_g - k_g*X - b_g*( (g-r)_std - 0.53) )
where:
g_std is the standard, or calibrated, magnitude of the star
(g-r)_std is the standard, or calibrated, g-r color of the star
a_g is the photometric zeropoint in g
k_g is the first-order extinction in g
b_g is the instrumental color term coefficient in g
X is the airmass
0.53 is a "fiducial" reference color for stars in g-r (based on SDSS experience)
Note that there is a separate photometric zeropoint (a_i) and
instrumental color term coefficient (b_i) for each CCD.
NCSA Processing Results¶
Special Processing Results¶
Attached Files¶