--- header unit 0: primary ---
SIMPLE = T / file does conform to FITS standard
BITPIX = -32 / number of bits per data pixel
NAXIS = 2 / number of data axes
NAXIS1 = 2048 / length of data axis 1
NAXIS2 = 2048 / length of data axis 2
EXTEND = T / FITS dataset may contain extensions
COMMENT FITS (Flexible Image Transport System) format is defined in 'Astronomy
COMMENT and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359H
EXTNAME = 'coadded image, outliers patched'
WCSAXES = 2 / no comment
CTYPE1 = 'RA---TAN' / TAN (gnomic) projection
CTYPE2 = 'DEC--TAN' / TAN (gnomic) projection
EQUINOX = 2000. / Equatorial coordinates definition (yr)
LONPOLE = 180. / no comment
LATPOLE = 0. / no comment
CRVAL1 = 297.72131 / RA of reference point
CRVAL2 = 4.543333 / DEC of reference point
CRPIX1 = 1024.5 / X reference pixel
CRPIX2 = 1024.5 / Y reference pixel
CUNIT1 = 'deg' / X pixel scale units
CUNIT2 = 'deg' / Y pixel scale units
CD1_1 = -0.000763888888889 / Transformation matrix
CD1_2 = 0 / no comment
CD2_1 = 0 / no comment
CD2_2 = 0.000763888888889 / no comment
IMAGEW = 2048 / Image width, in pixels.
IMAGEH = 2048 / Image height, in pixels.
MAGZP = 22.5 / Magnitude zeropoint (in Vega mag)
UNW_SKY = -8.76385988743866 / Background value subtracted from coadd img
UNW_VER = 'v3.3' / unWISE code git revision
UNW_URL = 'https://github.com/dstndstn/unwise-coadds' / git URL
UNW_DVER = 3.3 / unWISE data model version
UNW_DATE = '2016-01-22T12:21:48.409442' / unWISE run time
UNW_FR0 = 0 / unWISE frame start
UNW_FRN = 0 / unWISE N frames
UNW_MEDF = 0 / unWISE median filter sz
UNW_BGMA = F / unWISE background matching?
REFEREN1 = '' / reference coadd directory
REFEREN2 = '' / reference coadd directory, continued
EPOCH = -1 / epoch number
MJDMIN = 55305.70365022 / minimum MJD among included L1b frames
MJDMAX = 56952.85924972 / maximum MJD among included L1b frames