DataLabel Date Time Log Entry
GS-2012B-Q-6-50-002 2012-10-28 01:23:32 Signal 11000 counts through some clouds at 15 sec.
GS-2012B-Q-6-50-003 2012-10-28 01:27:59 Increase exptime to 20 sec.,
GS-2012B-Q-6-50-006 2012-10-28 01:30:37 Peak 21000 at exptime 20 sec. OI signal varying by ~ 20% due to clouds.
GS-2012B-Q-6-50-010 2012-10-28 01:34:07 22000
GS-2012B-Q-6-50-015 2012-10-28 01:38:30 26000, OI signal 12000-16000 w/ occasional 50% dips.
GS-2012B-Q-6-50-020 2012-10-28 01:42:53 OI signal down about 50%.
GS-2012B-Q-6-50-025 2012-10-28 01:47:16 Checked sky, thick clouds are completely gone. May be thin haze or very thin cirrus but even near moon I don't see anything obvious.
GS-2012B-Q-6-50-027 2012-10-28 01:49:02 OI signal varying 8000 - 15000. Seeing 0.8 - 1.1 arcsec, variable seeing probably causing OI counts to vary.
GS-2012B-Q-6-50-031 2012-10-28 01:52:32 Lost guiding, paused sequence after this.
GS-2012B-Q-6-50-032 2012-10-28 01:57:10 Restarted, 4.5 min gap. Centering and signal level look OK.
GS-2012B-Q-6-50-041 2012-10-28 02:05:04 Still many small wispy clouds drifting over, causing OI counts to vary by 30%, with occasional drops to < 10%.
GS-2012B-Q-6-50-052 2012-10-28 02:14:43 OI counts more stable in last 10 min, ~ 20% variability, seeing 0.7 arcsec.
GS-2012B-Q-6-50-059 2012-10-28 02:20:51 Seeing down to 0.45 arcsec, peak counts 32000.
GS-2012B-Q-6-50-061 2012-10-28 02:22:54 Reduced exptime from 20 sec to 16 sec.
GS-2012B-Q-6-50-063 2012-10-28 02:24:31 Seeing 0.54, peak 20000.
GS-2012B-Q-6-50-065 2012-10-28 02:26:08 OI varying by 50% again.
GS-2012B-Q-6-50-067 2012-10-28 02:27:46 Thick cloud, paused. 02:30 UTC. A big wave of clouds is coming down from the north. Aborted for the night at 3:30 UTC.