--- header unit 0: primary ---
SIMPLE = T / STANDARD FITS DATA
BITPIX = 8 / BITS / PIXEL
NAXIS = 2 / NUMBER OF AXES
NAXIS1 = 620 / NUMBER OF PIXELS IN X-DIRECTION
NAXIS2 = 570 / NUMBER OF PIXELS IN Y-DIRECTION
GAIN = 25 / GAIN OF A/D CONVERTER
OFFSET = 1 / OFFSET OF A/D CONVERTER
DATE = '18MAY2012' / DATE OF IMAGE ACQUISITION
TIME = '12:46:17' / TIME OF IMAGE ACQUISITION