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dstndstn / tractor

The Tractor: measuring astronomical sources via probabilistic inference
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PixelizedPsfEx keyword for XY [POLNAME1,POLNAME2] #109

Open marcogullieuszik opened 2 weeks ago

marcogullieuszik commented 2 weeks ago

I am just starting using tractor.

PixelizedPsfEx requires that PSFEX (and sextractor) use (X_IMAGE, Y_IMAGE) to define the source positions in the code line "assert(hdr['POLNAME1'].strip() == 'X_IMAGE')"

It would be extremely useful to add the option of using other sextractor positional parameters. For example, I usually use XWIN_IMAGE and YWIN_IMAGE as they provide more accurate centroid positions.

As a workaround I am now changing the "POLNAME1","POLNAME2" keywords in the PSFEX file

dstndstn commented 2 weeks ago

Good idea! If you want to send a Pull Request with that improvement, that would be great!