--- header unit 0: primary ---
SIMPLE = T / conforms to FITS standard
BITPIX = -64 / array data type
NAXIS = 3 / number of array dimensions
NAXIS1 = 281
NAXIS2 = 281
NAXIS3 = 6
EXTEND = T
DATE-OBS = '2019-05-12' / UT start date of exposure
CCDSIZE = '2048x2048' / Array dimensions
CREATOR = 'GPI DRP, v1.5.0,revc0cad3f' / This file created by GPI Data Reduction
OBSMODE = 'J_coron' / Currently selected observation Mode
RA = 256.72461667 / Target Right Ascension
DEC = -42.61103889 / Target Declination
DATE = '2019-05-12' / UTC Date of observation (YYYY-MM-DD)
EPOCH = 2000.0 / Target Coordinate Epoch
GEMPRGID = 'GS-2019A-LP-12' / Gemini programme ID
INSTRUME = 'GPI' / Instrument used to acquire data
OBSERVAT = 'Gemini-South' / Observatory (Gemini-North|Gemini-South)
OBSID = 'GS-2019A-LP-12-52' / Gemini Observation ID
CD1_1 = -3.92777777778E-06 / partial of first axis coordinate w.r.t. x
CD1_2 = -1.99332496626E-13 / partial of first axis coordinate w.r.t. y
CD2_1 = -1.99332496645E-13 / partial of second axis coordinate w.r.t. x
CD2_2 = 3.92777777778E-06 / partial of second axis coordinate w.r.t. y
CDELT1 = 3.6E-07 / Coordinate increment
CDELT2 = 3.6E-07 / Coordinate increment
CRPIX1 = 141.0 / x-coordinate of ref pixel [note: first pixel is
CRPIX2 = 141.0 / y-coordinate of ref pixel [note: first pixel is
CRVAL1 = 256.72461667 / Right ascension at ref point
CRVAL2 = -42.61103889 / Declination at ref point
CTYPE1 = 'RA---TAN' / First axis is Right Ascension
CTYPE2 = 'DEC--TAN' / Second axis is Declination
CUNIT1 = 'deg' / Units of data
CUNIT2 = 'deg' / Units of data
RADESYS = 'FK5' / R.A DEC coordinate system reference
BSCALE = 1 / Linear factor in scaling equation
BZERO = 0 / Zero point in scaling equation
WCSAXES = 3 / Number of axes in WCS system
CTYPE3 = 'STOKES' / Polarization
CUNIT3 = 'N/A' / Polarizations
CRVAL3 = 1 / I,Q_phi,U_phi,Q,U,LP_I
CRPIX3 = 0 / Reference pixel location
CD3_3 = 1 / Stokes axis: images 0 and 1 give orthogonal pol
FQ = 0.01173011076374381 / avg frac of stell/inst pol removed
FU = 0.01645035074599196 / avg frac of stell/inst pol removed
TARGET = 'Hen_3-1330' / Target Name
STOKES = 'I,Q_phi,U_phi,Q,U,LP_I' / dataq cube Stokes components
STAR_X = 140.5 / star position axis1 (1-based coordinates)
STAR_Y = 140.5 / star position axis2 (1-based coordinates)
INSTRU = 'GPI'
FILTER = 'J-band' / filter band of observation
ZEROPT = 1594 / Jy
REFMAG = 6.713 / ref. mag of star for flux conversion
FLUXUNIT = 'mJy/arcsec^2' / pixel flux units
CALIBFAC = 1.58335E-08 / Conversion factor mJy/arcsec^2/ADU/sec/coadd
SCALE = 14.14 / Pixel Scale mas/pix
COMMENT Stokes componts only take linear pol. into account
COMMENT All pol. images are stellar pol. subtracted.
COMMENT 2MASS magnitudes used for flux conversion.