Users report issues with star mass/star find/hot pixels

[GoogleCodeExporter]

I don't normally like to put multiple issues into the same defect, but I think 
these three are all related. Users have reported:
- problems with fluctuating star mass
- star find failing when there are obvious stars visible
- the star finder is attracted to hot pixels (I've seen this also)

Original issue reported on code.google.com by br...@boneheads.us on 25 Nov 2013 at 2:55

• Merged into: #330

[GoogleCodeExporter]

I spent some time today looking at the star finding code, and it is 
"non-trivial". It does seem to weight the center pixel heavily in the point 
spread function, which is probably why it is attracted to hot pixels.

Original comment by br...@boneheads.us on 1 Dec 2013 at 6:52

[GoogleCodeExporter]

Re: "star find failing when there are obvious stars visible"

FWIW, in every case I have seen of this it had to do with the star being below 
the required minimum 3.0 S/N ratio

Original comment by andy.gal...@gmail.com on 27 Jan 2014 at 4:46

[GoogleCodeExporter]

I am marking this as a dup of Issue 330.
There were errors in the AutoFind PSF convolution computation that could 
falsely identify hot pixels. After fixing those errors, I have tested several 
images and find that the new finder nicely avoids hot pixels.

Original comment by andy.gal...@gmail.com on 5 Sep 2014 at 5:02

• Changed state: Duplicate