more WASP-48_Light_240.fits
SIMPLE = T / file does conform to FITS standard
BITPIX = 16 / number of bits per data pixel
NAXIS = 2 / number of data axes
NAXIS1 = 4144 / length of data axis 1
NAXIS2 = 2822 / length of data axis 2
EXTEND = T / FITS dataset may contain extensions
COMMENT FITS (Flexible Image Transport System) format is defined in 'Astronomy
COMMENT and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359H
BZERO = 32768 / offset data range to that of unsigned short
BSCALE = 1 / default scaling factor
ROWORDER= 'TOP-DOWN' / Row Order
INSTRUME= 'SV405CC ' / Camera Name
EXPTIME = 6.000000E+01 / Total Exposure Time (s)
[snip]
FRAME = 'Light ' / Frame Type
IMAGETYP= 'Light Frame' / Frame Type
XBAYROFF= 0 / X offset of Bayer array
YBAYROFF= 0 / Y offset of Bayer array
BAYERPAT= 'GRBG ' / Bayer color pattern
FOCALLEN= 7.520E+02 / Focal Length (mm)
APTDIA = 1.500E+02 / Telescope diameter (mm)
SCALE = 1.270172E+00 / arcsecs per pixel
I am suspicious of "NAXIS = 2 / number of data axes"
I think there should be a 3rd data axis , the 3rd one being for the color.