--- header unit 0: primary ---
SIMPLE = T / conforms to FITS standard
BITPIX = 8 / array data type
NAXIS = 0 / number of array dimensions
EXTEND = T
CHECKSUM = 'B9eCD6ZAB6dAB6ZA' / HDU checksum updated 2026-03-05T21:35:01
DATASUM = '0' / data unit checksum updated 2026-03-05T21:35:01
--- 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 = 8694112 / 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(13896)' / 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 = 0.92941618469133 / Coordinate transformation matrix element
PC1_2 = -0.36903327171655 / Coordinate transformation matrix element
PC2_1 = 0.36903327171655 / Coordinate transformation matrix element
PC2_2 = 0.92941618469133 / 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 = 189.36441040039 / [deg] Coordinate value at reference point
CRVAL2 = 49.626728057861 / [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 = 49.626728057861 / [deg] Native latitude of celestial pole
MJDREF = 0.0 / [d] MJD of fiducial time
RADESYS = 'ICRS' / Equatorial coordinate system
FILETIME = '2025-08-22 03:42:07'
SURVEY = 'hdr5'
MASK = 'True'
CONVOLVE = 'False'
INTERP = 'linear'
FFSKY = 'False'
FFSKYRC = 'False'
SHOTID = 20230422018
FIELD = 'dex-spring'
OBJID = 'DEXsp0007'
DATE = 20230422
OBSID = 18
RA = 189.237812
DEC = 49.523908
PA = 290.106009
N_IFU = 75
FWHM = 1.6742532
FWHM_ERR = 0.09703405
RESPONSE = 0.1606
RELFLUX1 = 1.0069536
RELFLUX2 = 1.0254564
RELFLUX3 = 0.8803431
AMBTEMP = 15.267777
DATEVOBS = '20230422v018'
DEWPOINT = -14.741722
EXPNUM1 = 1
EXPNUM2 = 2
EXPNUM3 = 3
EXPTIME1 = 368.2492
EXPTIME2 = 367.34918
EXPTIME3 = 367.6494
HUMIDITY = 9.767
MJD1 = 60056.336
MJD2 = 60056.344
MJD3 = 60056.348
OBSIND = 1
PRESSURE = 801.5581
STRUCTAZ = 314.79648
TIME = '0805504'
TRAJCDEC = 49.52339
TRAJCPA = 288.54855
TRAJCRA = 189.23743
BUNIT = '1e-17 erg s^-1 cm^-2'
SPECBW = 2.0
EXTNAME = 'DATA' / extension name
CHECKSUM = 'LCWBNCV9LCVALCV7' / HDU checksum updated 2026-03-05T21:35:02
DATASUM = '477366317' / data unit checksum updated 2026-03-05T21:35:02
ZHECKSUM = '9k1j9j0g9j0g9j0g' / HDU checksum updated 2026-03-05T21:35:02
ZDATASUM = '4204808327' / data unit checksum updated 2026-03-05T21:35:02
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 = 9175552 / 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(17722)' / 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 = 0.92941618469133 / Coordinate transformation matrix element
PC1_2 = -0.36903327171655 / Coordinate transformation matrix element
PC2_1 = 0.36903327171655 / Coordinate transformation matrix element
PC2_2 = 0.92941618469133 / 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 = 189.36441040039 / [deg] Coordinate value at reference point
CRVAL2 = 49.626728057861 / [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 = 49.626728057861 / [deg] Native latitude of celestial pole
MJDREF = 0.0 / [d] MJD of fiducial time
RADESYS = 'ICRS' / Equatorial coordinate system
FILETIME = '2025-08-22 03:42:07'
SURVEY = 'hdr5'
MASK = 'True'
CONVOLVE = 'False'
INTERP = 'linear'
FFSKY = 'False'
FFSKYRC = 'False'
SHOTID = 20230422018
FIELD = 'dex-spring'
OBJID = 'DEXsp0007'
DATE = 20230422
OBSID = 18
RA = 189.237812
DEC = 49.523908
PA = 290.106009
N_IFU = 75
FWHM = 1.6742532
FWHM_ERR = 0.09703405
RESPONSE = 0.1606
RELFLUX1 = 1.0069536
RELFLUX2 = 1.0254564
RELFLUX3 = 0.8803431
AMBTEMP = 15.267777
DATEVOBS = '20230422v018'
DEWPOINT = -14.741722
EXPNUM1 = 1
EXPNUM2 = 2
EXPNUM3 = 3
EXPTIME1 = 368.2492
EXPTIME2 = 367.34918
EXPTIME3 = 367.6494
HUMIDITY = 9.767
MJD1 = 60056.336
MJD2 = 60056.344
MJD3 = 60056.348
OBSIND = 1
PRESSURE = 801.5581
STRUCTAZ = 314.79648
TIME = '0805504'
TRAJCDEC = 49.52339
TRAJCPA = 288.54855
TRAJCRA = 189.23743
BUNIT = '1e-17 erg s^-1 cm^-2'
SPECBW = 2.0
EXTNAME = 'ERROR' / extension name
CHECKSUM = '7d5OAd2O0d2O7d2O' / HDU checksum updated 2026-03-05T21:35:05
DATASUM = '2894396593' / data unit checksum updated 2026-03-05T21:35:05
ZHECKSUM = 'ZaRTdZOSZaOSdYOS' / HDU checksum updated 2026-03-05T21:35:05
ZDATASUM = '606898104' / data unit checksum updated 2026-03-05T21:35:05
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 = 289836 / 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(4711)' / 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 = 0.92941618469133 / Coordinate transformation matrix element
PC1_2 = -0.36903327171655 / Coordinate transformation matrix element
PC2_1 = 0.36903327171655 / Coordinate transformation matrix element
PC2_2 = 0.92941618469133 / 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 = 189.36441040039 / [deg] Coordinate value at reference point
CRVAL2 = 49.626728057861 / [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 = 49.626728057861 / [deg] Native latitude of celestial pole
MJDREF = 0.0 / [d] MJD of fiducial time
RADESYS = 'ICRS' / Equatorial coordinate system
FILETIME = '2025-08-22 03:42:07'
SURVEY = 'hdr5'
MASK = 'True'
CONVOLVE = 'False'
INTERP = 'linear'
FFSKY = 'False'
FFSKYRC = 'False'
SHOTID = 20230422018
FIELD = 'dex-spring'
OBJID = 'DEXsp0007'
DATE = 20230422
OBSID = 18
RA = 189.237812
DEC = 49.523908
PA = 290.106009
N_IFU = 75
FWHM = 1.6742532
FWHM_ERR = 0.09703405
RESPONSE = 0.1606
RELFLUX1 = 1.0069536
RELFLUX2 = 1.0254564
RELFLUX3 = 0.8803431
AMBTEMP = 15.267777
DATEVOBS = '20230422v018'
DEWPOINT = -14.741722
EXPNUM1 = 1
EXPNUM2 = 2
EXPNUM3 = 3
EXPTIME1 = 368.2492
EXPTIME2 = 367.34918
EXPTIME3 = 367.6494
HUMIDITY = 9.767
MJD1 = 60056.336
MJD2 = 60056.344
MJD3 = 60056.348
OBSIND = 1
PRESSURE = 801.5581
STRUCTAZ = 314.79648
TIME = '0805504'
TRAJCDEC = 49.52339
TRAJCPA = 288.54855
TRAJCRA = 189.23743
SPECBW = 2.0
EXTNAME = 'MASK' / extension name
CHECKSUM = 'FPcAHPa7FPaAFPa5' / HDU checksum updated 2026-03-05T21:35:06
DATASUM = '3798295877' / data unit checksum updated 2026-03-05T21:35:06
ZHECKSUM = '3HFH59EE3GEE39EE' / HDU checksum updated 2026-03-05T21:35:05
ZDATASUM = '1247251709' / data unit checksum updated 2026-03-05T21:35:05