Getting started & organizing files¶
Starting a PyRAF session¶
In
red/
, start a PyRAF session and an image display tool, eg.:> ds9 & > pyraf
A provided
loginuser.cl
file automatically definesraw$
&scripts$
path variables, picks up the local LA Cosmic and configures image display for GMOS.
Subsequent commands may be pasted into your PyRAF session and/or a CL script in a text editor (a complete script is provided for reference in
scripts/ref/f110.cl
). When constructing a CL script or working in CL (rather than PyRAF), you must remove theiraf.
prefix from any parameter settings (eg. below).Load all the packages needed by the reduction process:
gemini gmos rv pyfu task gmosaic=home$../scripts/gmosaic.cl # gap interpolation patched unlearn gemtools gmos # use reproducible parameter defaults
- You can add these commands to
loginuser.cl
if you want (along withgdisplay.fl_paste
below), so you don’t have to repeat them when restarting your session. If pyraf fails to start as a result, you may need to comment out the section in yourlogin.cl
beginningif (deftask("samp") == yes) {
.
- You can add these commands to
Specify a log file for this target (optional) and display GMOS images using the more practical
fl_paste+
option:iraf.gmos.logfile="F110.log" iraf.gemtools.logfile="F110.log" iraf.gmos.gdisplay.fl_paste=yes
Again, remove the
iraf.
here when pasting into a script.I believe the previous GMOS tutorial by Ricardo will discuss what GMOS data look like in general (otherwise I can elaborate a bit on that before moving on).
Organizing the data¶
Organize the data files into lists. Some (not all) reduction steps can use these to construct their input or output filenames, avoiding more repetition than necessary in our script.
gemlist S20140919S 90-94 > slow_bias.lis gemlist S20140926S 178-182 > fast_bias.lis gemlist S20140919S 60-61 > flat.lis gemlist S20140919S 80-81 > arc.lis gemlist S20140919S 59,62 > std.lis concatenate flat.lis,arc.lis,std.lis all.lis