--- header unit 0: primary ---
SIMPLE = T / conforms to FITS standard
BITPIX = 8 / array data type
NAXIS = 0 / number of array dimensions
EXTEND = T
CHECKSUM = 'A6dGD5Z9A5bGA5Z9' / HDU checksum updated 2026-03-05T18:15:42
DATASUM = '0' / data unit checksum updated 2026-03-05T18:15:42
--- header unit 1: binary table ---
XTENSION = 'BINTABLE' / binary table extension
BITPIX = 8 / array data type
NAXIS = 2 / number of array dimensions
NAXIS1 = 32 / width of table in bytes
NAXIS2 = 1040 / number of rows in table
PCOUNT = 9037412 / number of group parameters
GCOUNT = 1 / number of groups
TFIELDS = 4 / number of fields in each row
TTYPE1 = 'COMPRESSED_DATA' / label for field 1
TFORM1 = '1PB(15813)' / data format of field: variable length array
TTYPE2 = 'GZIP_COMPRESSED_DATA' / label for field 2
TFORM2 = '1PB(82)' / data format of field: variable length array
TTYPE3 = 'ZSCALE' / label for field 3
TFORM3 = '1D' / data format of field: 8-byte DOUBLE
TTYPE4 = 'ZZERO' / label for field 4
TFORM4 = '1D' / data format of field: 8-byte DOUBLE
ZIMAGE = T / extension contains compressed image
ZTENSION = 'IMAGE' / Image extension
ZBITPIX = -32 / array data type
ZNAXIS = 3 / number of array dimensions
ZNAXIS1 = 104
ZNAXIS2 = 104
ZNAXIS3 = 1036
ZPCOUNT = 0 / number of parameters
ZGCOUNT = 1 / number of groups
ZTILE1 = 32 / size of tiles to be compressed
ZTILE2 = 32 / size of tiles to be compressed
ZTILE3 = 16 / size of tiles to be compressed
ZCMPTYPE = 'RICE_1' / compression algorithm
ZNAME1 = 'BLOCKSIZE' / compression block size
ZVAL1 = 32 / pixels per block
ZNAME2 = 'BYTEPIX' / bytes per pixel (1, 2, 4, or 8)
ZVAL2 = 4 / bytes per pixel (1, 2, 4, or 8)
ZNAME3 = 'NOISEBIT' / floating point quantization level
ZVAL3 = 16.0 / floating point quantization level
ZQUANTIZ = 'NO_DITHER' / No dithering during quantization
WCSAXES = 3 / Number of coordinate axes
CRPIX1 = 52.5 / Pixel coordinate of reference point
CRPIX2 = 52.5 / Pixel coordinate of reference point
CRPIX3 = 1.0 / Pixel coordinate of reference point
PC1_1 = -0.9119906671657 / Coordinate transformation matrix element
PC1_2 = -0.41021094939393 / Coordinate transformation matrix element
PC2_1 = 0.41021094939393 / Coordinate transformation matrix element
PC2_2 = -0.9119906671657 / Coordinate transformation matrix element
CDELT1 = -0.00013888888888889 / [deg] Coordinate increment at reference point
CDELT2 = 0.00013888888888889 / [deg] Coordinate increment at reference point
CDELT3 = 2.0 / [m] Coordinate increment at reference point
CUNIT1 = 'deg' / Units of coordinate increment and value
CUNIT2 = 'deg' / Units of coordinate increment and value
CUNIT3 = 'Angstrom' / Units of coordinate increment and value
CTYPE1 = 'RA---TAN' / Right ascension, gnomonic projection
CTYPE2 = 'DEC--TAN' / Declination, gnomonic projection
CTYPE3 = 'WAVE' / Vacuum wavelength (linear)
CRVAL1 = 180.43466186523 / [deg] Coordinate value at reference point
CRVAL2 = 54.085075378418 / [deg] Coordinate value at reference point
CRVAL3 = 3470.0 / [m] Coordinate value at reference point
LONPOLE = 180.0 / [deg] Native longitude of celestial pole
LATPOLE = 54.085075378418 / [deg] Native latitude of celestial pole
MJDREF = 0.0 / [d] MJD of fiducial time
RADESYS = 'ICRS' / Equatorial coordinate system
FILETIME = '2025-08-21 15:48:23'
SURVEY = 'hdr5'
MASK = 'True'
CONVOLVE = 'False'
INTERP = 'linear'
FFSKY = 'False'
FFSKYRC = 'False'
SHOTID = 20210117023
FIELD = 'dex-spring'
OBJID = 'DEXsp2451'
DATE = 20210117
OBSID = 23
RA = 180.36284
DEC = 54.203621
PA = 64.231913
N_IFU = 69
FWHM = 2.2933428
FWHM_ERR = 0.40680817
RESPONSE = 0.216
RELFLUX1 = 0.9131927
RELFLUX2 = 1.0324944
RELFLUX3 = 1.0580944
AMBTEMP = 4.911667
DATEVOBS = '20210117v023'
DEWPOINT = -13.353333
EXPNUM1 = 1
EXPNUM2 = 2
EXPNUM3 = 3
EXPTIME1 = 548.0494
EXPTIME2 = 547.8496
EXPTIME3 = 547.6496
HUMIDITY = 21.341
MJD1 = 59231.355
MJD2 = 59231.363
MJD3 = 59231.367
OBSIND = 1
PRESSURE = 801.4226
STRUCTAZ = 37.34334
TIME = '0830307'
TRAJCDEC = 54.20409
TRAJCPA = 62.79174
TRAJCRA = 180.3628
BUNIT = '1e-17 erg s^-1 cm^-2'
SPECBW = 2.0
EXTNAME = 'DATA' / extension name
CHECKSUM = '8dL3AbJ32bJ38bJ3' / HDU checksum updated 2026-03-05T18:15:43
DATASUM = '566346084' / data unit checksum updated 2026-03-05T18:15:43
ZHECKSUM = 'FLNFHLLCFLLCFLLC' / HDU checksum updated 2026-03-05T18:15:42
ZDATASUM = '2125980272' / data unit checksum updated 2026-03-05T18:15:42
HISTORY BUNIT updated: flux per pixel (removed arcsec^-2).
--- header unit 2: binary table ---
XTENSION = 'BINTABLE' / binary table extension
BITPIX = 8 / array data type
NAXIS = 2 / number of array dimensions
NAXIS1 = 32 / width of table in bytes
NAXIS2 = 1040 / number of rows in table
PCOUNT = 9075419 / number of group parameters
GCOUNT = 1 / number of groups
TFIELDS = 4 / number of fields in each row
TTYPE1 = 'COMPRESSED_DATA' / label for field 1
TFORM1 = '1PB(16264)' / data format of field: variable length array
TTYPE2 = 'GZIP_COMPRESSED_DATA' / label for field 2
TFORM2 = '1PB(82)' / data format of field: variable length array
TTYPE3 = 'ZSCALE' / label for field 3
TFORM3 = '1D' / data format of field: 8-byte DOUBLE
TTYPE4 = 'ZZERO' / label for field 4
TFORM4 = '1D' / data format of field: 8-byte DOUBLE
ZIMAGE = T / extension contains compressed image
ZTENSION = 'IMAGE' / Image extension
ZBITPIX = -32 / array data type
ZNAXIS = 3 / number of array dimensions
ZNAXIS1 = 104
ZNAXIS2 = 104
ZNAXIS3 = 1036
ZPCOUNT = 0 / number of parameters
ZGCOUNT = 1 / number of groups
ZTILE1 = 32 / size of tiles to be compressed
ZTILE2 = 32 / size of tiles to be compressed
ZTILE3 = 16 / size of tiles to be compressed
ZCMPTYPE = 'RICE_1' / compression algorithm
ZNAME1 = 'BLOCKSIZE' / compression block size
ZVAL1 = 32 / pixels per block
ZNAME2 = 'BYTEPIX' / bytes per pixel (1, 2, 4, or 8)
ZVAL2 = 4 / bytes per pixel (1, 2, 4, or 8)
ZNAME3 = 'NOISEBIT' / floating point quantization level
ZVAL3 = 16.0 / floating point quantization level
ZQUANTIZ = 'NO_DITHER' / No dithering during quantization
WCSAXES = 3 / Number of coordinate axes
CRPIX1 = 52.5 / Pixel coordinate of reference point
CRPIX2 = 52.5 / Pixel coordinate of reference point
CRPIX3 = 1.0 / Pixel coordinate of reference point
PC1_1 = -0.9119906671657 / Coordinate transformation matrix element
PC1_2 = -0.41021094939393 / Coordinate transformation matrix element
PC2_1 = 0.41021094939393 / Coordinate transformation matrix element
PC2_2 = -0.9119906671657 / Coordinate transformation matrix element
CDELT1 = -0.00013888888888889 / [deg] Coordinate increment at reference point
CDELT2 = 0.00013888888888889 / [deg] Coordinate increment at reference point
CDELT3 = 2.0 / [m] Coordinate increment at reference point
CUNIT1 = 'deg' / Units of coordinate increment and value
CUNIT2 = 'deg' / Units of coordinate increment and value
CUNIT3 = 'Angstrom' / Units of coordinate increment and value
CTYPE1 = 'RA---TAN' / Right ascension, gnomonic projection
CTYPE2 = 'DEC--TAN' / Declination, gnomonic projection
CTYPE3 = 'WAVE' / Vacuum wavelength (linear)
CRVAL1 = 180.43466186523 / [deg] Coordinate value at reference point
CRVAL2 = 54.085075378418 / [deg] Coordinate value at reference point
CRVAL3 = 3470.0 / [m] Coordinate value at reference point
LONPOLE = 180.0 / [deg] Native longitude of celestial pole
LATPOLE = 54.085075378418 / [deg] Native latitude of celestial pole
MJDREF = 0.0 / [d] MJD of fiducial time
RADESYS = 'ICRS' / Equatorial coordinate system
FILETIME = '2025-08-21 15:48:23'
SURVEY = 'hdr5'
MASK = 'True'
CONVOLVE = 'False'
INTERP = 'linear'
FFSKY = 'False'
FFSKYRC = 'False'
SHOTID = 20210117023
FIELD = 'dex-spring'
OBJID = 'DEXsp2451'
DATE = 20210117
OBSID = 23
RA = 180.36284
DEC = 54.203621
PA = 64.231913
N_IFU = 69
FWHM = 2.2933428
FWHM_ERR = 0.40680817
RESPONSE = 0.216
RELFLUX1 = 0.9131927
RELFLUX2 = 1.0324944
RELFLUX3 = 1.0580944
AMBTEMP = 4.911667
DATEVOBS = '20210117v023'
DEWPOINT = -13.353333
EXPNUM1 = 1
EXPNUM2 = 2
EXPNUM3 = 3
EXPTIME1 = 548.0494
EXPTIME2 = 547.8496
EXPTIME3 = 547.6496
HUMIDITY = 21.341
MJD1 = 59231.355
MJD2 = 59231.363
MJD3 = 59231.367
OBSIND = 1
PRESSURE = 801.4226
STRUCTAZ = 37.34334
TIME = '0830307'
TRAJCDEC = 54.20409
TRAJCPA = 62.79174
TRAJCRA = 180.3628
BUNIT = '1e-17 erg s^-1 cm^-2'
SPECBW = 2.0
EXTNAME = 'ERROR' / extension name
CHECKSUM = 'JaeMKXZKJabKJUZK' / HDU checksum updated 2026-03-05T18:15:43
DATASUM = '468428609' / data unit checksum updated 2026-03-05T18:15:43
ZHECKSUM = '2Ol14Li02Li02Li0' / HDU checksum updated 2026-03-05T18:15:43
ZDATASUM = '1631594134' / data unit checksum updated 2026-03-05T18:15:43
HISTORY BUNIT updated: flux per pixel (removed arcsec^-2).
--- header unit 3: binary table ---
XTENSION = 'BINTABLE' / binary table extension
BITPIX = 8 / array data type
NAXIS = 2 / number of array dimensions
NAXIS1 = 8 / width of table in bytes
NAXIS2 = 1040 / number of rows in table
PCOUNT = 598512 / number of group parameters
GCOUNT = 1 / number of groups
TFIELDS = 1 / number of fields in each row
BSCALE = 1
BZERO = 32768
TTYPE1 = 'COMPRESSED_DATA' / label for field 1
TFORM1 = '1PB(6792)' / data format of field: variable length array
ZIMAGE = T / extension contains compressed image
ZTENSION = 'IMAGE' / Image extension
ZBITPIX = 16 / array data type
ZNAXIS = 3 / number of array dimensions
ZNAXIS1 = 104
ZNAXIS2 = 104
ZNAXIS3 = 1036
ZPCOUNT = 0 / number of parameters
ZGCOUNT = 1 / number of groups
ZTILE1 = 32 / size of tiles to be compressed
ZTILE2 = 32 / size of tiles to be compressed
ZTILE3 = 16 / size of tiles to be compressed
ZCMPTYPE = 'RICE_1' / compression algorithm
ZNAME1 = 'BLOCKSIZE' / compression block size
ZVAL1 = 32 / pixels per block
ZNAME2 = 'BYTEPIX' / bytes per pixel (1, 2, 4, or 8)
ZVAL2 = 2 / bytes per pixel (1, 2, 4, or 8)
WCSAXES = 3 / Number of coordinate axes
CRPIX1 = 52.5 / Pixel coordinate of reference point
CRPIX2 = 52.5 / Pixel coordinate of reference point
CRPIX3 = 1.0 / Pixel coordinate of reference point
PC1_1 = -0.9119906671657 / Coordinate transformation matrix element
PC1_2 = -0.41021094939393 / Coordinate transformation matrix element
PC2_1 = 0.41021094939393 / Coordinate transformation matrix element
PC2_2 = -0.9119906671657 / Coordinate transformation matrix element
CDELT1 = -0.00013888888888889 / [deg] Coordinate increment at reference point
CDELT2 = 0.00013888888888889 / [deg] Coordinate increment at reference point
CDELT3 = 2.0 / [m] Coordinate increment at reference point
CUNIT1 = 'deg' / Units of coordinate increment and value
CUNIT2 = 'deg' / Units of coordinate increment and value
CUNIT3 = 'Angstrom' / Units of coordinate increment and value
CTYPE1 = 'RA---TAN' / Right ascension, gnomonic projection
CTYPE2 = 'DEC--TAN' / Declination, gnomonic projection
CTYPE3 = 'WAVE' / Vacuum wavelength (linear)
CRVAL1 = 180.43466186523 / [deg] Coordinate value at reference point
CRVAL2 = 54.085075378418 / [deg] Coordinate value at reference point
CRVAL3 = 3470.0 / [m] Coordinate value at reference point
LONPOLE = 180.0 / [deg] Native longitude of celestial pole
LATPOLE = 54.085075378418 / [deg] Native latitude of celestial pole
MJDREF = 0.0 / [d] MJD of fiducial time
RADESYS = 'ICRS' / Equatorial coordinate system
FILETIME = '2025-08-21 15:48:23'
SURVEY = 'hdr5'
MASK = 'True'
CONVOLVE = 'False'
INTERP = 'linear'
FFSKY = 'False'
FFSKYRC = 'False'
SHOTID = 20210117023
FIELD = 'dex-spring'
OBJID = 'DEXsp2451'
DATE = 20210117
OBSID = 23
RA = 180.36284
DEC = 54.203621
PA = 64.231913
N_IFU = 69
FWHM = 2.2933428
FWHM_ERR = 0.40680817
RESPONSE = 0.216
RELFLUX1 = 0.9131927
RELFLUX2 = 1.0324944
RELFLUX3 = 1.0580944
AMBTEMP = 4.911667
DATEVOBS = '20210117v023'
DEWPOINT = -13.353333
EXPNUM1 = 1
EXPNUM2 = 2
EXPNUM3 = 3
EXPTIME1 = 548.0494
EXPTIME2 = 547.8496
EXPTIME3 = 547.6496
HUMIDITY = 21.341
MJD1 = 59231.355
MJD2 = 59231.363
MJD3 = 59231.367
OBSIND = 1
PRESSURE = 801.4226
STRUCTAZ = 37.34334
TIME = '0830307'
TRAJCDEC = 54.20409
TRAJCPA = 62.79174
TRAJCRA = 180.3628
SPECBW = 2.0
EXTNAME = 'MASK' / extension name
CHECKSUM = 'YE8CZE6AYE6AYE6A' / HDU checksum updated 2026-03-05T18:15:44
DATASUM = '4210831577' / data unit checksum updated 2026-03-05T18:15:44
ZHECKSUM = '9MnUELnR9LnRELnR' / HDU checksum updated 2026-03-05T18:15:44
ZDATASUM = '792619237' / data unit checksum updated 2026-03-05T18:15:44