Reply To: FITS and FIT files suffix

Forums Photometry FITS and FIT files suffix Reply To: FITS and FIT files suffix

Nick James

The file extension shouldn’t make any difference.

Are the files roughly the same size? The raw files you get from the camera are probably 16-bit integer (BITPIX=16). After calibration they may be floating point (BITPIX=-32) and it may be that Vphot can’t cope with that. The FP files will be twice the size of the integer ones. If Vphot can’t cope with FP that is a bit poor but there may be an option in ASTAP to save as ints.

Failing that, have a look at the FITS header and see if you can spot any significant differences. That might give a clue as to what is going wrong.