Subject: Re: 2.5m obslog 20050422 (MJD 53483)
Date: Sat, 23 Apr 2005 18:25:45 -0600 (MDT)
From: ank@apo.nmsu.edu (Atsuko Nitta Kleinman)
>The three darks showed the following exposure time and the dark time.
>The exp# is the length of the dark exposure we specified in the command line.
>
>
>                  header
>frame#  exp#   exp#  dark time exp#
>------- -----  ----- --------------
>32208    60s    2s         60s
>32209   120s    2s        120s
>32210   200s    2s        200s
>32211   300s    2s        300s
          ^      ^          ^
          |      |          |
          |      |         "DARKTIME" in header
          |      "EXPTIME" in header
        exposure time I specified on command line
scot> Which header fields are you reading to get these numbers? I take it the
scot> header information all agreed in the flats case?
Yes, the flats specified exposure time on command line agreed with
the "EXPTIME" in the header.  I think when "-dark" is used,
the exposure time specified on command line becomes "DARKTIME" in
the header. If so, I do not know what the 2s of "EXPTIME" in the header
is.
Sorry my log was not clear.
atsuko