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MJD56242-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