
absphot

  we have relphot to determine the relative photometry on small spatial scales
  we have uniphot to determine the zero point trend with time.
  the result of these two should be a single, consistent photometry system in the internal filter system

  the goal of absphot is to determine the relationships between the
  internal magnitude system and an external reference

usage:

  absphot -target (photcode) -ref (photcode) [-region RA RA DEC DEC]

  - determine the fit M_ref = M_target + \Sum_i A_i * color^i

    
