This table, like the previous example, has 4 rows, each of which contains a 300 x 200 pixel image. In this case, however, the position of the image on the sky varies from image to image and so the Reference Values must be supplied in columns in the table rather than as header keywords. The pixel size and image rotation are still assumed to be the same for each image.
XTENSION= 'BINTABLE' / binary table extension BITPIX = 8 / 8-bit bytes NAXIS = 2 / 2-dimensional binary table NAXIS1 = 240024 / width of table in bytes NAXIS2 = 4 / number of rows in table PCOUNT = 0 / size of special data area GCOUNT = 1 / one data group (required keyword) TFIELDS = 4 / number of fields in each row TTYPE1 = 'Name ' / name of observed object TFORM1 = '16A ' / data format of the field: ASCII Character TTYPE2 = '1CRVL4 ' / reference pixel of axis 1 in column 5 TFORM2 = '1E ' / data format of the field: R*4 TTYPE3 = '2CRVL4 ' / reference pixel of axis 2 in column 5 TFORM3 = '1E ' / data format of the field: R*4 TTYPE4 = 'Image ' / 2-D image vector TFORM4 = '60000J ' / data format of the field: I*4 vector TDIM4 = '(300,200)' / dimension sizes of the vector COMMENT The following keywords define the coordinate system of the image COMMENT contained in Column 5 of the table 1CTYP4 = 'RA---TAN' / TAN projection used 1CRPX4 = 150 / reference pixel 1CDLT4 = -.00277777 / increment per pixel 1CUNI4 = 'deg ' / physical units of axis 1 2CTYP4 = 'DEC--TAN' / TAN projection used 2CRPX4 = 100 / reference pixel 2CDLT4 = .00277777 / increment per pixel 2CUNI4 = 'deg ' / physical units of axis 2 2CROT4 = 30.0 / image rotation (degrees) 11PC4 = .866025403 / Coord. Descrp. Matrix: cos(CROTA2) 22PC4 = -.5 / Coord. Descrp. Matrix: -sin(CROTA2) 12PC4 = .5 / Coord. Descrp. Matrix: sin(CROTA2) 21PC4 = .866025403 / Coord. Descrp. Matrix: cos(CROTA2) EQUINOX = 2000.0 / coordinate epoch MJD-OBS = 44258.7845612 / MJD of the observation END