M 31 Andromedagalaxie

SIMPLE = T / file does conform to FITS standard BITPIX = -32 / number of bits per data pixel NAXIS = 3 / number of data axes NAXIS1 = 5367 / length of data axis 1 NAXIS2 = 3578 / length of data axis 2 NAXIS3 = 3 / length of data axis 3 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 = 0. / Offset data range to that of unsigned short BSCALE = 1. / Default scaling factor MIPS-HI = 65535 / Lower visualization cutoff PROGRAM = 'Siril 1.4.0-beta3' / Software that created this HDU FILENAME= 'Light_M 31_120.0s_Bin1_ISO3200_20250928-233554_23.0C_0094.fit' DATE = '2025-09-30T20:53:39' / UTC date that FITS file was created DATE-OBS= '2025-09-28T21:33:48.240101' / YYYY-MM-DDThh:mm:ss observation start, IMAGETYP= 'Light ' / Type of image EXPTIME = 120. / [s] Exposure time duration TELESCOP= 'iOptron CEM25/CEM60' / Telescope used to acquire this image FILTER = 'Starless' / Active filter name FOCALLEN= 287.559 / [mm] Focal length XBINNING= 1 / Camera binning mode YBINNING= 1 / Camera binning mode XPIXSZ = 4.39 / [um] Pixel X axis size YPIXSZ = 4.39 / [um] Pixel Y axis size INSTRUME= 'Canon EOS R5' / Instrument name CCD-TEMP= 23. / [degC] CCD temperature STACKCNT= 108 / Stack frames LIVETIME= 12960. / [s] Exposure time after deadtime correction EXPSTART= 2460947.27101507 / [JD] Exposure start time (standard Julian date) EXPEND = 2460947.43099309 / [JD] Exposure end time (standard Julian date) OBJECT = 'M 31 ' / Name of the object