m42_b_00054df_wcs.fits
TARGET  = 'Zeta Ori'           / target
EXPTIME =              1.0E+02 / exposure time (seconds)
FILTER  = ' (2) B (375-490) '  / filter
DATE-OBS= '2012-01-29T00:33:48' / date of observation (UT)

m42_b_coadd.fits
EXPTIME =   4.000000000000E+02 / Maximum equivalent exposure time (s)

m42_r_00046df_wcs.fits
TARGET  = 'Zeta Ori'           / target
EXPTIME =              1.0E+02 / exposure time (seconds)
FILTER  = ' (4) R (570-690) '  / filter
DATE-OBS= '2012-01-29T00:16:57' / date of observation (UT)

m42_r_coadd.fits
EXPTIME =   4.000000000000E+02 / Maximum equivalent exposure time (s)

m42_v_00050df_wcs.fits
TARGET  = 'Zeta Ori'           / target
EXPTIME =              1.0E+02 / exposure time (seconds)
FILTER  = ' (3) V (490-580) '  / filter
DATE-OBS= '2012-01-29T00:25:28' / date of observation (UT)

m42_v_coadd.fits
EXPTIME =   4.000000000000E+02 / Maximum equivalent exposure time (s)