[vsnet-chat 1645] February sequence field photometry

[aah@nofs.navy.mil]

I've finished my February run, and have posted 15 new
or updated files of photometry to
  http://ftp.nofs.navy.mil/pub/outgoing/aah/sequence

The goals for this run were (a) to remove some
irritating scattered light problems in the CCD system;
and (b) to get deep sequences for some GRB fields.
Out of the 6 nights, I had two cloudy, three with
seeing greater than 5arcsec, and one that was photometric
in the middle 8 hours.  I discovered and solved two
of the scattered light problems (it is like peeling an
onion...there are always more layers under the current
one), but had little luck on the deep sequences.  So
you then fall back on secondary programs.  For non-photometric
nights, I do differential photometry for various Cepheid
and RR Lyr fields.  If the seeing is good and there is only
light cirrus, then I have a few crowded fields for
which I need faint photometry.  For photometric nights with poor
seeing, I work on bright sequences such as those in the
'requests' file and wait for the seeing to improve
(it does, sometimes).  That is why I like to have such a file.

My next run is March 9/10 through March 14/15.

Arne

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