Combined bias and dark frames.

Here we use lists of bias and dark images identified in the previous section(s) to create combined bias and dark images. Below I tabulate these fimages and their line numbers in the list.* files for 3 nights.

 
20171231  (/home/sco/HET_reds/20171231/red0/list.all):
Image Type         Start Image                            End Image                  line numbers
-------------    ------------------------------    ------------------------------    ------------
ACAM bias        20171231T022335.3_acm_sci.fits    20171231T022647.8_acm_sci.fits       3  42 
5 second dark    20171231T022658.9_acm_sci.fits    20171231T023326.6_acm_sci.fits      43  82
10 second dark   20171231T023342.8_acm_sci.fits    20171231T024325.4_acm_sci.fits      83 122
20 second dark   20171231T024351.5_acm_sci.fits    20171231T030004.0_acm_sci.fits     123 162 

20180101 (/home/sco/HET_reds/20180101/red0/list.all):
Image Type         Start Image                            End Image                  line numbers
-------------    ------------------------------    ------------------------------    ------------
ACAM bias        20180101T072624.8_acm_sci.fits    20180101T072940.2_acm_sci.fits       1  41  
5 second dark    20180101T072956.3_acm_sci.fits    20180101T073631.7_acm_sci.fits      42  82 
10 second dark   20180101T073652.8_acm_sci.fits    20180101T074648.5_acm_sci.fits      83 123
20 second dark   20180101T074719.6_acm_sci.fits    20180101T080355.7_acm_sci.fits     124 164  

20180102 (/home/sco/HET_reds/20180102/red0/list.BD):
Image Type         Start Image                            End Image                  line numbers
-------------    ------------------------------    ------------------------------    ------------
ACAM bias        20180102T073753.0_acm_sci.fits    20180102T074113.6_acm_sci.fits 
5 second dark    20180102T074129.9_acm_sci.fits    20180102T074810.5_acm_sci.fits
10 second dark   20180102T075522.8_acm_sci.fits    20180102T080525.2_acm_sci.fits 
20 second dark   20180102T080556.8_acm_sci.fits    20180102T082239.4_acm_sci.fits

Combine acm bias frames.

Here is how I make a master bias frame. I use the 20171231 night in the example below.


% cut_by_line list.all 3 42 list.bias
% acm_stack list.bias 7
% mv Big_Stack.fits bias_20171231.fits

The result of acm_stack is always the image named "Big_Stack.fits". I rename this to an image name that gives the cal type (bias) and the date of the night (20171231).

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