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Table B.1.

Image header content.

Parameter Example value Explanation
BITPIX 8 Data type of original image
NAXIS 2 Dimension of original image
NAXIS1 2048 Length of original image axis
NAXIS2 4096 Length of original image axis
PCOUNT 0 Size of special data area
GCOUNT 1 One data group (required keyword)
RUN 677729 Run number
OBSERVAT LAPALMA Name of observatory (IRAF style)
OBJECT intphas_5023 r Title of observation
LATITUDE 28.761907 Telescope latitude (degrees)
LONGITUD -17.877559 Telescope longitude (degrees)
HEIGHT 2348 [m] Height above sea level.
SLATEL LPO2.5 Telescope name known to SLALIB
TELESCOP INT 2.5m Isaac Newton Telescope
MJD-OBS 55015.0452356 Modified Julian Date at start of observation
JD 2455015.5452356 Julian Date at start of observation
PLATESCA 6.856013 [d/m] Platescale ( 24.68arcsec/mm)
TELFOCUS 0.043825 Telescope focus (metres)
AIRMASS 1.021475 Effective mean airmass
TEMPTUBE 13.508864 Truss Temperature (degrees Celsius)
INSTRUME WFC INT wide-field camera is in use.
WFFPOS 5 Position-number of deployed filter
WFFBAND r Waveband of filter
WFFID 214 Unique identifier of filter
SECPPIX 0.333 Arcseconds per pixel
DETECTOR WFC Formal name of camera
CCDSPEED FAST Readout speed
CCDXBIN 1 Binning factor in x axis
CCDYBIN 1 Binning factor in y axis
CCDSUM 1 1 Binning factors (IRAF style)
CCDTEMP 151.959 [K] Cryostat temperature
NWINDOWS 0 Number of readout windows
DATE-OBS 2009-07-03T01:05:10.8 Start time of the exposure [UTC]
INHERIT T Extension inherits primary HDU.
EXTNAME extension1 Extension name
EXTVER 1 Extension version number
IMAGEID 1 Image identification
DASCHAN 1 Number of readout channel
WINNO 0 Number of readout window
CHIPNAME A5506-4 Name of detector chip.
CCDNAME A5506-4 Name of detector chip.
CCDCHIP A5506-4 Name of detector chip.
CCDTYPE EEV42-80 Type of detector chip.
CCDXPIXE 0.00001350 [m] Size of pixels in x.
CCDYPIXE 0.00001350 [m] Size of pixels in y.
AMPNAME LH Name of output amplifier.
GAIN 2.80000000 Nominal Photo-electrons per ADU.
READNOIS 6.40000000 Nominal Readout noise in electrons.
SATURATE 64276.0 Highest value that is unsaturated
BIASSEC [11:50,3:4098] Bias pixels.
TRIMSEC [51:2098,3:4098] Illuminated pixels.
RTDATSEC [2062:4215,13:4212] Location in d-space for RTD.
RADESYS ICRS WCS calibrated against Gaia-DR2
EQUINOX 2000.0 Equinox of the astrometry
CTYPE1 RA ZPN Algorithm type for axis 1
CTYPE2 DECZPN Algorithm type for axis 2
CRUNIT1 deg Unit of right ascension coordinates
CRUNIT2 deg Unit of declination coordinates
PV2_1 1.0 Coefficient for r term
PV2_2 0.0 Coefficient for r**2 term
PV2_3 213.741679 Coefficient for r**3 term
PV2_5 0.0 Coefficient for r**5 term
CRVAL1 292.931917 [deg] Right ascension at the reference pixel
CRVAL2 28.6651568 [deg] Declination at the reference pixel
CRPIX1 -329.738223 [pixel] Reference pixel along axis 1
CRPIX2 2945.36999 [pixel] Reference pixel along axis 2
CD1_1 -1.3972E-06 Transformation matrix element
CD1_2 -9.2449E-05 Transformation matrix element
CD2_1 -9.2444E-05 Transformation matrix element
CD2_2 1.3945E-06 Transformation matrix element
STDCRMS 0.02526049569007405 Astrometric fit error (arcsec)
MOONDIST 81.0 Distance to the moon in degrees
MOONALT 18.29999923706055 Altitude of the moon above the horizon
MOONPHAS 83.40000152587891 Phase of the moon
SKYLEVEL 252.99 Sky level
SKYNOISE 10.96000003814697 Sky noise
PERCORR -0.005 Sky calibration correction (mags)
MAGZPT 24.47 Uncorrected nightly ZP (per second)
MAGZRR 0.02 Photometric ZP error (mags)
EXTINCT 0.09 Extinction coefficient (mags)
PHOTZP 28.2187 mag(Vega) = -2.5*log(pixel value) + PHOTZP
PHOTZPER 0.03 Default 1-sigma PHOTZP uncertainty in IGAPS
PHOTSYS Vega Photometric system
FLUXCAL IGAPS-UNIFORM Identifies the origin of PHOTZP
SEEING 0.753579 Average FWHM (arcsec)
ELLIPTIC 0.1319999992847443 Average ellipticity
EXPTIME 30.07 [sec] Exposure time adopted
CONFMAP iphas_jul2009 r_conf.fits Confidence map
CHECKSUM ZfA6ad53VdA3Zd53 HDU checksum updated 2020-02-11T11:35:56
DATASUM 1159687462 data unit checksum updated 2020-02-11T11:35:56

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