exptime		exptime
darktime	exptime
sidereal        st
imagetyp	data-typ
subset		f1pos
biassec		biassec []
datasec		datasec []

fixpix		bp-flag 0
overscan	bt-flag 0
zerocor		bi-flag 0
darkcor		dk-flag 0
flatcor		ff-flag 0
fringcor	fr-flag 0

'object (  0 )'		object
'dark (  1 )'		dark
'proj flat (  2 )'	flat
'sky flat (  3 )'	other
'comp (  4 )'		other
'bias (  5 )'		zero
'dome flat (  6 )'	flat