photom

photom is a legacy Talon/OCAAS program that performs differential photometry on a group of FITS files. It uses a user-supplied configuration file with a list of FITS files and  coordinates of target, check star, and reference star. The output file is a space-delimited list of differential magnitudes, one line per image. The output list includes a heliocentric modified JD timestamp for convenience when studying e.g. binary stars. More details can be found in the OCAAS manual (on deimos, this is stored in folder /usr/local/talon/).

N.B. See program plot-photout, which plots the ASCII output file of photom.

Version: latest Talon/OCAAS release.

Usage: photom [-vc] config_file

  -c: crop files to bounding box *IN PLACE*

  -f: include FWHM geo mean and ratio in report

  -x: include X and Y image location in report

  -v: verbose

Known bugs/issues: None

Example config file:

5 5                    # First line: max. search radius [pixels], aperture radius [pixels]

files:

xea12400.fts    # List of FITS Files, one per line, or *fname, where fname is a file with a list of FITS files

xea12401.fts

xea12402.fts

xea12403.fts

xea12404.fts

fixed:                  # Can also specify wanderer, see OCAAS manual for details

17:29:12.8 +06:17:15.8   # Target

17:29:02.1 +06:17:52.3  # Check star

17:29:23.6 +06:18:15.8   # Reference

Sample usage: 

photom v765_oph.photin > v765_oph.photout

more v765_oph.photout

  N File      Z      dX   dY  HC       MHJD       Sky  SkyRMS  V0     Err0   V1     Err1   V2     Err2

  0 xea12400  1.70    0    0 -0.00400 8511.78291   533    8.5  3.200  0.010  1.080  0.004  0.000  0.003

  1 xea12401  1.19    1   -1 -0.00400 8511.86392   523   10.0  2.898  0.009  1.077  0.004 -0.064  0.003

  2 xea12402  1.30    0    0 -0.00400 8511.83335   530   12.5  3.334  0.011  1.080  0.004 -0.041  0.003

  3 xea12403  1.17    0   -1 -0.00400 8511.87005   524   10.5  2.743  0.008  1.086  0.004 -0.071  0.003

  4 xea12404  1.17    0    0 -0.00400 8511.87199   524   10.5  2.671  0.008  1.077  0.004 -0.065  0.003

  5 xea12405  1.14    0    0 -0.00400 8511.88304   523   10.5  2.412  0.007  1.076  0.004 -0.081  0.003

  6 xea12406  1.14    0    0 -0.00400 8511.88690   524    9.5  2.401  0.007  1.087  0.004 -0.083  0.003

  7 xea12407  1.12    0    0 -0.00400 8511.89794   524    9.5  2.462  0.007  1.078  0.004 -0.080  0.003

  8 xea12408  1.11    0    0 -0.00400 8511.90612   521    9.0  2.473  0.007  1.029  0.004 -0.045  0.003

  9 xea12409  1.11    0    0 -0.00400 8511.91910   527   10.5  2.578  0.007  1.081  0.004 -0.079  0.003

 10 xea1240a  1.11    0    0 -0.00400 8511.94235   528    9.5  2.697  0.008  1.078  0.004 -0.083  0.003

 11 xea1240b  1.13    0    0 -0.00401 8511.95970   528    9.5  2.750  0.008  1.076  0.004 -0.072  0.003

 12 xea1240d  1.18    0    0 -0.00400 8511.86816     0    0.0  2.775  0.008  1.083  0.004 -0.065  0.003

 13 xea1240e  1.16    0    0 -0.00400 8511.87391   523   11.5  2.628  0.008  1.082  0.004 -0.066  0.003

 14 xea1240f  1.14    0   -1 -0.00400 8511.88496   524   11.5  2.401  0.007  1.083  0.004 -0.083  0.003

 15 xea12410  1.12    0    0 -0.00400 8511.89985     0    0.0  2.481  0.007  1.067  0.004 -0.085  0.003

 16 xea12411  1.11    0    0 -0.00400 8511.90804   524   10.5  2.498  0.007  1.075  0.004 -0.085  0.003

 17 xea12412  1.11    0    0 -0.00400 8511.91717     0    0.0  2.564  0.007  1.082  0.004 -0.078  0.003

 18 xea12413  1.11    0    0 -0.00400 8511.94427   521    8.5  2.700  0.008  1.079  0.004 -0.088  0.003

 19 xea12414  1.14    0    0 -0.00401 8511.96162   522    9.5  2.781  0.008  1.082  0.004 -0.079  0.003


© Robert Mutel 2018