Thanks for the tips and leads on this problem. The files are indeed converted to (BITPIX=-32) by ASTAP and doubled
in size being 65Meg.
AAVSO people have advised me to check that FITS header details for my system correspond to registration info on VPhot
which it didn’t. I corrected this expecting success but sadly no.
I just want to upload my obs. Very frustrating.
If anyone can spare the time I’ll upload the FITS header.
The uncalibrated files from ASIair load fine
The stacked and calibrated file from ASTAP will not
Kevin
British Astronomical Association
Supporting amateur astronomers since 1890