acm_xy_graphical
Updated: Sep08,2020

A routine that enables the user to make a graphical determination of the IHMP center position i the acm coordinate system. The input file contains XY positions in the IHMP system (from the fplane.txt file) and XY in the acm system from measurements made with codes like lmap and the ds9. The four detector positions measured are for 056=LRS2B, 066=LRS2R, 555=BIB, and 600=HPFacq.

 

% acm_xy_graphical -h  

usage: acm_xy_graphical Data.ALL  [-v] [-h]  
arg1 = date the bias images were taken 
Additional options: 
 -v = print verbose comments and run in debug mode 
 -a = specify a custom acm FITS image 
 -h = just show usage message  

% cat Data.ALL
# IHMP-acm positions after Sep2018 FPA take-down
# name     X,Y_ihmp         X,Y_acm      X,Y_acm _prev
# data
555       0.7  -73.1     455.0  398.7    455.0  398.7
600     -39.9   9.97     148.7  250.3    148.7  250.3
056     -50.0 -150.0     738.6  211.6    738.6  211.6
066      50.0 -150.0     739.7  577.3    739.7  577.3

%  acm_xy_graphical Data.ALL -a a.fits  
Result from acm_xy_graphical:  
acam_x_origin  =  184.71  -+  2.16   (acm pixels)  
acam_y_origin  =  397.35  -+  2.16   (acm pixels)

In the example above we have renamed a typical acm image to be "a.fits" and moved it into the local working directory. If the "-a" is not used to read a custom image then one is pulled from the critical_files directory. A typical run is shown below where I have opened a second ds9 windo with a wider zoon field of view to show the radial extent of each detector used in the derivation.

The left panel shows the overlap of the radial zones for the 056 (LRS2-B), 066(LRS2-R), 555(BIB), and 600(HPFacq) detectores overplotted on a random acm image. This was made with the command:


% acm_xy_graphical Data.ALL 
Result from acm_xy_graphical:
acam_x_origin  =  185.10  -+  2.08   (acm pixels)
acam_y_origin  =  397.59  -+  2.08   (acm pixels)

The black circle represents a "visual fit" to the overlapping zones. The cenetr of this circle represenst the position of the IHMP center in the acm coordinate system. The right panel shows the full field view taht allows th reader to see each labeled radial zone.

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