Subject: 2.5m obslog 20070207 (MJD 54139)
Date: Thu,  8 Feb 2007 06:20:16 -0700 (MST)
From: swatters@apo.nmsu.edu
                       APACHE POINT OBSERVATORY SDSS 2.5M
                                 OBSERVING LOG
                          Wednesday February  7, 2007
                                  (MJD 54139)
---=== OBSERVING TEAM ===---
Swing:  Dan Long
Night:  Elena Malanushenko
        Shannon Watters
---=== OBSERVING PLAN ===---
        5c13nc3!
---=== OBSERVING SUMMARY ===---
The night started with mostly clear skies.  We were able to finish 3 plates and
get signal on another before a combination of cirrus clouds and the moon ruined
our exposures.  We did finish the night with a good exposure on a fifth plate
(not done).
We had a problem with a forced-fill of sp1 at the beginning of the night
(problems).
---=== OBSERVING LOG ===---
Afternoon:
----------
Afternoon check completed.  No problems encountered.
Spectrograph focus checked but not adjusted.  Best focus around 6 to 7 C.
00:00Z  Doors Open, Louvers Open, Fans On.
Night:
------
01:20Z  Cart 9, plate 2419, chunk135.  Plate doesn't start until 02:25Z so we
        won't start science until 5 minutes after twilight ends (02:05Z).
        GSOGTF, T=5.7C, relfoc=120, seeing ~1.7".
        02:00Z Precals
        02:12Z Science (1200)
        02:34Z Science (1200)
        02:57Z Science (1200)
        03:20Z Postcals
        03:27Z Science (900)
        PLATE DONE
03:49Z  Cart 4, plate 2425, chunk135.  Previous (S/N)^2 = 10.3 (r1)
        GSOGTF, T=6.1C, relfoc=100, seeing ~1.8".
        04:00Z Science (1800)
        04:33Z Postcals
        PLATE DONE
04:45Z  Cart 2, plate 2582, chunk151.
        GSOGTF, T=5.9C, relfoc=80, seeing ~1.75".
        04:53Z Precals
        05:02Z Science (1200)
        05:24Z Science (1000)
        05:45Z Science (900)
        PLATE DONE
06:07Z  Cart 8, plate 2591, chunk151.
        GSOGTF, T=4.1C, relfoc=30, seeing ~1.3".
        06:20Z Precals
        06:25Z Science (1000)
        06:46Z Science (1500)
        07:14Z Science (1500) BAD
        07:42Z Science (1500) ABORTED
        We got (S/N)^2  caget tpm_TM_PMSSAvg tpm_TM_TelairAvg.VALA
tpm_TM_PMSSAvg            6.03
tpm_TM_TelairAvg.VALA     7.36
sp1                       8.7
sp2                       7.2
      Mean offset (pix)                 Collimator Position
                                    sp1                    sp2
      b1   r1    b2   r2      A      B      C        A      B      C
old  .15 -.31  -.11 -.04     5204   2792   1276   10215   8808   8114
new     no change needed
After removing the enclosure we force-filled the spectro dewars.  After it
appeared to finish I went out to disconnect the cryo lines but sp2 repeatedly
filled for 10-20 seconds, stopped for 20-30 seconds, filled for 10-20 seconds,
etc.  Dan Long came out and did a force fill of sp2 and it took another 11.5
pounds before it was full.  He did the same for sp1 (just in case) but it was
already full.  The total fill was 42 lbs.