PHOTRED

Name

photred

Purpose

Reduction of non-variable point source absolute photometry.

Description

Calling Sequence

pro photred,stand,fil,jd,am,serial,mag,err,comp,dofil, $
object,redmag,rederr, $
NOPRINT=noprint, PLOT=plotit, BINFAC=binfac, FORCE=force

Inputs

stand - String array of standard names. (See coord.)
fil - String array of filter names for observations.
jd - Double precision array of Julian dates.
am - Floating point array of the airmass of observations.
serial - Serial number of observation.
mag - Raw instrumental magnitudes.
err - Uncertainties on the raw magnitudes.
comp - Standard name of comparison star.
dofil - Name of filter to reduce.

Optional Input Parameters

Keyword Input Parameters

ALL - Flag, if true reduces non-stars as well and returns a single
average value for non-stars.
BINFAC - Maximum amount of comparison star point to bin (default=6)
FORCE - Two element vector that contains override values for the
mean extinction and its uncertainty. This replaces the
initial fit for mean extinction.
NOPRINT - Flag, if true, will inhibit the summary printout to the screen.
PLOT - Flag, if true will enable the summary plot of the comp star.
STDMAG - Standard magnitude of comparison star (default=0).

Outputs

object - Name(s) of program object reduced against comp star.
redmag - Final reduced magnitude of object compared to comp star.
rederr - Final uncertainty.

Keyword Output Parameters

Common Blocks

Side Effects

Restrictions

Procedure

Modification History

1993/07/28 - Written by Marc W. Buie, Lowell Observatory
1993/12/09 - MWB, added extinction override (FORCE)
1993/12/12 - MWB, added ALL flag
2009/10/02, MWB, changed Polyfitw call to poly_fit equivalent