--- header unit 0: primary ---
SIMPLE = T / conforms to FITS standard
BITPIX = 8 / array data type
NAXIS = 0 / number of array dimensions
EXTEND = T
CHECKSUM = 'B6fFE4Z9B4dEB4Z9' / HDU checksum updated 2026-03-05T19:15:04
DATASUM = '0' / data unit checksum updated 2026-03-05T19:15:04
--- 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 = 8781449 / 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(13923)' / data format of field: variable length array
TTYPE2 = 'GZIP_COMPRESSED_DATA' / label for field 2
TFORM2 = '1PB(47)' / 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 = -0.93324939948669 / Coordinate transformation matrix element
PC1_2 = -0.35922911680116 / Coordinate transformation matrix element
PC2_1 = 0.35922911680116 / Coordinate transformation matrix element
PC2_2 = -0.93324939948669 / 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 = 221.57347106934 / [deg] Coordinate value at reference point
CRVAL2 = 52.007011413574 / [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 = 52.007011413574 / [deg] Native latitude of celestial pole
MJDREF = 0.0 / [d] MJD of fiducial time
RADESYS = 'ICRS' / Equatorial coordinate system
FILETIME = '2025-08-21 21:13:33'
SURVEY = 'hdr5'
MASK = 'True'
CONVOLVE = 'False'
INTERP = 'linear'
FFSKY = 'False'
FFSKYRC = 'False'
SHOTID = 20220210023
FIELD = 'dex-spring'
OBJID = 'DEXsp3774'
DATE = 20220210
OBSID = 23
RA = 221.634309
DEC = 52.097668
PA = 67.397139
N_IFU = 76
FWHM = 1.5735387
FWHM_ERR = 0.20266503
RESPONSE = 0.1539
RELFLUX1 = 0.9587535
RELFLUX2 = 0.9332121
RELFLUX3 = 0.9436322
AMBTEMP = 6.076667
DATEVOBS = '20220210v023'
DEWPOINT = -14.3545
EXPNUM1 = 1
EXPNUM2 = 2
EXPNUM3 = 3
EXPTIME1 = 367.74902
EXPTIME2 = 367.50665
EXPTIME3 = 367.1218
HUMIDITY = 20.31
MJD1 = 59620.402
MJD2 = 59620.406
MJD3 = 59620.414
OBSIND = 1
PRESSURE = -99898.45
STRUCTAZ = 39.918083
TIME = '0940002'
TRAJCDEC = 52.098293
TRAJCPA = 65.76717
TRAJCRA = 221.63304
BUNIT = '1e-17 erg s^-1 cm^-2'
SPECBW = 2.0
EXTNAME = 'DATA' / extension name
CHECKSUM = 'TLbgUKbdTKbdTKbd' / HDU checksum updated 2026-03-05T19:15:05
DATASUM = '467222135' / data unit checksum updated 2026-03-05T19:15:05
ZHECKSUM = '0iJ22fH10fH10fH1' / HDU checksum updated 2026-03-05T19:15:05
ZDATASUM = '674832102' / data unit checksum updated 2026-03-05T19:15:05
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 = 9625960 / 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(18888)' / data format of field: variable length array
TTYPE2 = 'GZIP_COMPRESSED_DATA' / label for field 2
TFORM2 = '1PB(47)' / 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 = -0.93324939948669 / Coordinate transformation matrix element
PC1_2 = -0.35922911680116 / Coordinate transformation matrix element
PC2_1 = 0.35922911680116 / Coordinate transformation matrix element
PC2_2 = -0.93324939948669 / 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 = 221.57347106934 / [deg] Coordinate value at reference point
CRVAL2 = 52.007011413574 / [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 = 52.007011413574 / [deg] Native latitude of celestial pole
MJDREF = 0.0 / [d] MJD of fiducial time
RADESYS = 'ICRS' / Equatorial coordinate system
FILETIME = '2025-08-21 21:13:33'
SURVEY = 'hdr5'
MASK = 'True'
CONVOLVE = 'False'
INTERP = 'linear'
FFSKY = 'False'
FFSKYRC = 'False'
SHOTID = 20220210023
FIELD = 'dex-spring'
OBJID = 'DEXsp3774'
DATE = 20220210
OBSID = 23
RA = 221.634309
DEC = 52.097668
PA = 67.397139
N_IFU = 76
FWHM = 1.5735387
FWHM_ERR = 0.20266503
RESPONSE = 0.1539
RELFLUX1 = 0.9587535
RELFLUX2 = 0.9332121
RELFLUX3 = 0.9436322
AMBTEMP = 6.076667
DATEVOBS = '20220210v023'
DEWPOINT = -14.3545
EXPNUM1 = 1
EXPNUM2 = 2
EXPNUM3 = 3
EXPTIME1 = 367.74902
EXPTIME2 = 367.50665
EXPTIME3 = 367.1218
HUMIDITY = 20.31
MJD1 = 59620.402
MJD2 = 59620.406
MJD3 = 59620.414
OBSIND = 1
PRESSURE = -99898.45
STRUCTAZ = 39.918083
TIME = '0940002'
TRAJCDEC = 52.098293
TRAJCPA = 65.76717
TRAJCRA = 221.63304
BUNIT = '1e-17 erg s^-1 cm^-2'
SPECBW = 2.0
EXTNAME = 'ERROR' / extension name
CHECKSUM = '9O6XAN6U9N6UAN6U' / HDU checksum updated 2026-03-05T19:15:06
DATASUM = '1325718800' / data unit checksum updated 2026-03-05T19:15:06
ZHECKSUM = 'QKkSQKhPQKhPQKhP' / HDU checksum updated 2026-03-05T19:15:06
ZDATASUM = '1923978282' / data unit checksum updated 2026-03-05T19:15:06
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 = 977066 / 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(7998)' / 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 = -0.93324939948669 / Coordinate transformation matrix element
PC1_2 = -0.35922911680116 / Coordinate transformation matrix element
PC2_1 = 0.35922911680116 / Coordinate transformation matrix element
PC2_2 = -0.93324939948669 / 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 = 221.57347106934 / [deg] Coordinate value at reference point
CRVAL2 = 52.007011413574 / [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 = 52.007011413574 / [deg] Native latitude of celestial pole
MJDREF = 0.0 / [d] MJD of fiducial time
RADESYS = 'ICRS' / Equatorial coordinate system
FILETIME = '2025-08-21 21:13:33'
SURVEY = 'hdr5'
MASK = 'True'
CONVOLVE = 'False'
INTERP = 'linear'
FFSKY = 'False'
FFSKYRC = 'False'
SHOTID = 20220210023
FIELD = 'dex-spring'
OBJID = 'DEXsp3774'
DATE = 20220210
OBSID = 23
RA = 221.634309
DEC = 52.097668
PA = 67.397139
N_IFU = 76
FWHM = 1.5735387
FWHM_ERR = 0.20266503
RESPONSE = 0.1539
RELFLUX1 = 0.9587535
RELFLUX2 = 0.9332121
RELFLUX3 = 0.9436322
AMBTEMP = 6.076667
DATEVOBS = '20220210v023'
DEWPOINT = -14.3545
EXPNUM1 = 1
EXPNUM2 = 2
EXPNUM3 = 3
EXPTIME1 = 367.74902
EXPTIME2 = 367.50665
EXPTIME3 = 367.1218
HUMIDITY = 20.31
MJD1 = 59620.402
MJD2 = 59620.406
MJD3 = 59620.414
OBSIND = 1
PRESSURE = -99898.45
STRUCTAZ = 39.918083
TIME = '0940002'
TRAJCDEC = 52.098293
TRAJCPA = 65.76717
TRAJCRA = 221.63304
SPECBW = 2.0
EXTNAME = 'MASK' / extension name
CHECKSUM = '0J4I2J1F0J1F0J1F' / HDU checksum updated 2026-03-05T19:15:06
DATASUM = '3848110612' / data unit checksum updated 2026-03-05T19:15:06
ZHECKSUM = 'cQ63dN42cN42cN42' / HDU checksum updated 2026-03-05T19:15:06
ZDATASUM = '982310759' / data unit checksum updated 2026-03-05T19:15:06