Measure aperture photometry using the mido.sh routine and other assorted scripts. An easy way to run this is to use apphot_interactive.

 
% apphot --help   

Usage: apphot 20191022T025524.2_acm_sci.fits aps1.cdfp 3.0 AP1  
arg1 - FITS image to be measured       
arg2 - name of the cdfp file containing aperture position (Xcent,Ycent) 
arg3 - aperture radius in units of arcseconds   
arg4 - basename for the output table file    
Additional options: 
     -v = print verbose comments 
 --help = view a help document 

Note that the cdfp file specifiying the aapertures can have any name (i.e. it is not tied to the basename of the input image). This was done so that one cdfp file can be used to compute magnitude sets using different aperture sizes. The output from this routine is a table file with the basename specified by arg4. The regions file for these apertures is stored using the table basename.

This routine was assembled from a lot of pre-existing routines in April 2020. I collected some working notes for this period.

Below I show a more verbose example of an apphot run.

 
% ls  
 aps1.cdfp

% apphot ../local_red/WCS/20191022T025524.2_acm_sci.fits aps1.cdfp 3.0 APER1 
****  Please wait, mido.sh is computing images parameters.

% ls 
20191022T025524.2_acm_sci.fits	APER1.parlab  APER1.table  
APER1.cdfp			APER1.reg     aps1.cdfp    

The APER1.t table file contains: 
% cat APER1.parlab  
Xpix  X pixels (aperture X center)                   
Ypix  Y pixels (aperture Y center)                   
Xcen  X center, pixels (intensity weighted centroid) 
Ycen  Y center, pixels (intensity weighted centroid) 
Mag30  magnitude (assuming zp=30)                     
MeanAp  Average value per pixel in aperture           
MeanSky Average value per pixel in sky annulus       
Npix    Number of pixels in aperture                   
Fpeak   Peak pixel value (no bkg-sub, image ADU)       
Mtype   marker code (1=circle,2=box,3=ellipse)      

The Ra,Dec values are pasted into the table file to get a cdfp file for use in
psoitional cross-matching in the, for instance, the zeropoint determination later: 
% head -5 APER1.cdfp  
Ra_hrs,Dec_deg,Xpix,Ypix,Xcen,Ycen,Mag30,MeanAp,MeanSky,Npix,Fpeak,Mtype,
  19.740600586   26.221525192	 737.84    209.03    737.74    209.10  12.322 31865.816  1263.165      385.0   64219.45   1
  19.739345551   26.207641602	 472.52     90.99    472.54     91.06  15.031  2632.667   115.620      386.0   13957.64   1
  19.736711502   26.249803543	 168.15    756.53    168.20    756.59  15.885  1236.209    81.096      383.0    5352.90   1
  19.739686966   26.216396332	 562.44    186.81    562.46    186.85  16.129  1002.018    78.761      383.0    5290.61   1