TRES spectra

TRES Reduction Tasks
Doug Mink, 2009-Feb-11

Telescope Data Center
TRES ThAr Image
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0. Start IRAF and load the tres package by typing

ecl> tres

#               TRES Data Reduction Package                 |
#           Smithsonian Astrophysical Observatory           |
#                   Telescope Data Center                   |
#                Version 1.3.2 March 19, 2009               |
#                    Processing steps at                    |
#  |

      btres       tcemsao     tfset       tmodid      trsavg      trspec
      ctres       tcosmic     tharadd     tmonth      trscode     trsproc
      ftres       tdata       tharlist    tpmake      trsdate     trssum
      qtres       tdisp       tharplot    tpreamp     trsdb       tsetbcv
      skyplot     tdispref    tharset     tpreamp1    trsdecode   tskysub
      stres       textract    thartable   tpreproc    trsdump     ttres
      tapref      tfib        tidref      tproc       trsfiles    tvxcsao
      tarith      tfib1       tlog        tpxcsao     trsgroup    txdelete
      tcal        tflat       tmakeflat   tquick      trslist     txdisp
      tcal1       tflatlist   tmakeref    trelearn    trsmed      txstat


   If the banner message says  *** Run trelearn to update parameters ***

tres> trelearn

   If this task crashes, run it again.  I haven't figured out how to deal
   cleanly with deleted parameters, but added parameters will now appear
   in your parameter files with their default values.

1. Run trsdate yyyy.mmdd to put yourself in the correct working directory
   The date is saved as a parameter, so if you have to leave IRAF for some
   reason, or make sure that you are in the right directory, all you have to
   to is type

tres> trsdate
Date for images (now=today) (2009.0311): [return]
tres> pwd

2. Run trsgroup to make lists of similarly configured files.  Run this after
   several FLAT and COMP exposures have been made.  If trsgroup.redo=yes,
   the default value, th old lists and data.db file will be deleted and new,
   updated lists will be written.

3. Run ftres on lists of similarly configured flat files (FLATmb12x40.list, for example)
   For the first night of a run or if the fibers have been moved, run this interactively:

tres> ftres FLATmb12x40 sumspec+ makeref+ interact+

   See tmakeref/ for an example of how to set up the aperture reference files.

4. Run ttres on multiple exposures at the beginning of the night to get night
   references for each configuration.

   To set a medium fiber binned standard from three exposures, for example

tres> cat COMPmb12.list
tres> ttres 35-37 compstd="sum" compid+

   compstd="sum" will run tcal1 to fit dispersion functions for both
   apertures of the summed calibration file.  compid+ should put you
   in interactive mode to examine the lines which are found and the
   fit the ecidentify task gets to them.

   If the cross-correlation program, pxcsao, crashes on one of the two
   fibers, the tcal1 program is really what is crashing.  Run it on the
   individual fibers:

tres> tcal1 interact+

   If it runs through and the resulting wavelength solution looks offset when
   you plot it with tharplot, delete the two _f*.ec.fits files, and run textract
   on the image file

tres> textract 0207.COMP_sum_0035_0124.fits

   Then run tcal1 to fit the dispersion function:

tres> tcal1 interact+

   and plot it with the ThAr lines labelled using tharplot:

tres> tharplot