reduction software for QUCAM2
The following IDL
programs are available in /home/smt/QUCAM2.
Thius program requires an 'rmode spec' sequence of biases taken in
fast. It analyses the CIC events in the image and plots a histogram of
values on a log scale. The user then has to click once at each extreme
of the linear part of the histogram. The program then calculates the
system gain and the CIC. The program will give better results if the
biases are full frame. The sequence should also have plenty of frames
to improve statistics. The image histogram is then stored as a text
file in the /scratch/whta/L3 directory alongside a fits image
containing the sum of all the bias images in the sequence.
This program allows a quick look at sequences of spectra taken with
'rmode spec'command. It prompts the user to enter the y coordinate of
the lower and the upper spatial extremes of the spectra. It then bins
spatially between these extremes to produce a 1-row spectrum, one for
each frame in the sequence. These 1-row spectrum are then stacked to
produce a 2D image or 'trailed spectrum'. The user is then prompted for
a file name in which to store this image (fits format).
Running IDL on a SPARC
First 'cd' to the /home/smt/QUCAM2 directory and enter the IDL
environment by typing 'IDL' .
The program of interest must then be compiled using
.run <program name>
The program can then be executed by typing
There are 2 example fits files
alongside the IDL programs.
r1099929.fit is an image sequence taken looking at a faint pinhole. It
can be used as input to 'L3specquicklook1.pro'.
The spatial extremes of this synthetic spectrum are y=115 to
r1099957.fit is a sequence of bias frames. It can be used as
input to 'calcnoiseqcam2.pro'
Setting the Environment
The GSFC IDL
library must be in
the IDL path. This library is stored in /home/smt/QUCAM2/FITSlib.
This can be added to the users path by adding the following lines to
the .postlogin file:
# For IDL astro libraries
set add_idlpath =
if ( $?IDL_PATH ) then
Simon Tulloch Jan 2008