m41_B_100s_00013_df.fits
TARGET  = '                '   / target
EXPTIME =                 100. / exposure time (seconds)
FILTER  = ' (2) B (375-490)'   / filter
DATE-OBS= '2012-11-18T06:54:00.857' / date of observation (UT)

m41_R_100s_00012_df.fits
TARGET  = '                '   / target
EXPTIME =                 100. / exposure time (seconds)
FILTER  = ' (4) R (570-690) '  / filter
DATE-OBS= '2012-11-18T06:51:18.298' / date of observation (UT)

m41_V_100s_00014_df.fits
TARGET  = '                '   / target
EXPTIME =                 100. / exposure time (seconds)
FILTER  = ' (3) V (490-580)  ' / filter
DATE-OBS= '2012-11-18T06:57:48.004' / date of observation (UT)