Same Photometry Settings on Same Image - different results

Posted by clkotnik on Aug 07, 2019; 9:35pm
URL: http://astroimagej.170.s1.nabble.com/Same-Photometry-Settings-on-Same-Image-different-results-tp1199.html

I ran photometry on an image sequence in which the first image had a saturated target.  The resulting measurements file indicated the target was saturated in every image which was not the case.  I tried downgrading to ver 3.2.0 from a recent upgrade to  3.3.1 and still have the problem.

I have tried to create the simplest demonstration I can for this problem.  I have placed a set of two images, an aperture radec file and the Measurements.txt results I get at this link.  I also included an image of my measurements settings.  Basically, I am asking AIJ to position the apertures based on RA/DEC.

I have been using AIJ for some time - long enough to recognize that I have somehow gotten one of the many settings wrong.  However, I am stumped and would welcome any suggestions.

Here are the steps to reproduce:
1) Open the 190721_0550 image (not in a sequence).  Import the apertures from the radec file.
Perform photometry with the settings shown in the MeasurementsSettingCapture.JPG image leaving
the apertures as they were imported.  Note saturated is correctly 63764 and Peak_T1 is the same.

2) Close the image window and open another with image window on 190721_0584.  Again import the radec file and perform photometry as before.  Note saturated is zero and Peak_T1 is 23796.

3) Now close the image window and repeat steps 1 and 2 except during step 2 leave the image window open and pick File->Open Image in this Window to get the 190721_0584 image.  Still import the radec file again for the second image so you can see the apertures are placed at the correct spots.

The results for the 2nd image 190721_0584 is that Peak_T1 is that from the 1st image and not 23796.  This shows up in Saturated and many other values for the second image are changed.


regards,
Cliff