Date: Sun, 1 Jan 2006 00:13:05 -0000 (UTC)
Subject: Re: 2.5m obslog 20051230 (MJD 53735)
From: "Viktor Malanushenko"
Hi, Steph
about your questions:
Saturday, December 31, 2005, 12:59:49 PM, you wrote:
ss> Viktor, John,
ss> The exposures for frame 36071 exist as the flat for your next plate.
ss> Two questions:
ss> Did you ever see a science exposure read out?
ss> Was the countdown timer working?
I have seen:
  - start of exposure and countdown timer was working
  - warning that 300 sec left to end of exposure
  - images of spectra on TV monitors
  I'd not controlled end of exposure, sorry, i.e. made discussion about
  next plate together with Olena and some later - with Olena and John.
  With probability 60-80% I am sure, that message about end of
  exposure had on monitor...
  Viktor
ss> Steph
ss> On Dec 31, 2005, at 12:48 PM, jcb@sdsshost2.apo.nmsu.edu wrote:
>>
>> There was one problem involving a missing science exposure on plate
>> 2051.  See
>> Log for details.
>>
>> 05:30Z  Cart 7 Plate 2051 (tile 8017, segue104)  This plate already
>> had a low
>>         total (S/N)^2 of 11 from previous observations.  GSOGTF.  A
>> first 1200
>>         s exposure gave a low (S/N)^2 of 2.7 in b1.  Viktor issued a
>>         doNextScience command from his SOP session (as evidenced by
>> SOPGUI)
>>         at 05:58Z, then a stopGuider command was recorded at
>> 06:24Z.  However,
>>         no such exposure (expected sequence number 36071) ever
>> appeared on disk.
>>         sos_redo claimed there were no files to re-reduce.  There
>> is also no
>>         evidence in the Activity section of the log that a spectro
>> exposure
>>         was underway at this time; in fact, there is an "end
>> spectroScience"
>>         entry at 06:01Z, then nothing else until instChange at
>> 06:24.  For
>>         whatever reason, we lost about 25 minutes on this phantom
>> exposure.
>>         The previous science exposure (36070) did not give us
>> enough signal
>>         to declare this plate done.
>>
                          mailto:viktorm@apo.nsmu.edu