UT20090611 Telescope Performance Verification
with IRTC at LFBG

Observers: DThompson, MPedani (LBT)
Telescope Operator: DGonzalez-Huerta
Software Support: TEdgin (on call)
Telescope Support: DOfficer

Summary

  • B29 Installed, PMC subsystem did not start up. Fixed by ...
  • LBC pressure sensor - odd behavior encountered

Details (Time in UTC)

LBC Issue
After pumping and cooldown, we started housekeeping back up and the pressure immediately started to climb. When it hit 1.0e-4 we turned off housekeeping under the assumption that there was a vacuum leak. DOfficer blew out what he could of the remaining LN2, but the temperature readout for red has been stable at 156.4 for a while now (normal is 152?). But later when JHill checked the pressure was back down to 1e-5 and started rising like before. As of 12:38UT the pressure rose to just below 1.0e-4 but then turned around and is still going down, currently at 4.3e-5. We suspect the gauge is bad but will wait and see what happens for a bit longer.

01:43 Rotator in fault/emergency stop mode, unable to ready. JLittle involved. SW issues, restarted.

02:13 Jamison is starting his laser-tracker measurements now. Some laser-tracker SW had hung on a computer at level 4. Done at 02:27

02:31 IRS/IRC not running? Calling Tony Edgin. IRS was not running on lbtmu302. David was getting warning messages when he tries to ssh into lbtmu302. It looks like lbtmu302 was rebooted at some point recently. Everything back up now.

06:40 Open! Toutside=5.2, Tmirror=6.6, RH=34.5, wind ~10m/s.

06:40:49.588 pointto WT10_0230 to correct pointing. IE changed from -74.2298 to -121.0, CA changed from 6.36950 to 24.0

06:48:41.923 pointto BS9164 gs=0 Tel="ACTIVE" to collimate: 2115, 1162, ?, 315, 150

06:52:45.667 pointto BS9164 gs=14 Tel="ACTIVE"

Guider GAIN factor tests

07:01 Start guide Seq. of 150 2.0s exposures with Gain = 0.9 First guide Image: 1053 Last guide Image: 1221 First IRTC: 70056

20090611_00001_cube.fit*

07:08 Start guide Seq. of 150 2s exposures with Gain = 0.6

First guide Image: 1254 Last guide Image:1373 First IRTC : 70824

20090611_00002_cube.fit*

07:15 Start guide Seq. of 150 2s exposures with Gain = 0.3

First guide image: 1396 Last guide image: 1510 First IRTC: 71504

20090611_00003_cube.fit*

07:21 Start guide Seq. of 150 2s exposures with Gain = 0.05

First guide: 1522 Last guide: 1635 First IRTC: 72114

20090611_00004_cube.fit*

Note: The star drifts away from hotspot on guider (gain to low)

07:27 Start guide Seq. of 150 2s exposures with Gain = 0.7

First guide: 1650 Last guide: 1762 First IRTC: 72736

20090611_00005_cube.fit*

07:33 Start guide Seq. of 150 2s exposures with Gain = 0.5

Note: some cirrus passing over

First guide: 1781 Last guide: 1882 First IRTC: 73416

20090611_00006_cube.fit*

07:40 Start guide Seq. of 150 2s exposures with Gain = 0.4

First guide: 1911 Last guide: 2036 First IRTC: 74120

20090611_00007_cube.fit*

07:48 Start guide Seq. of 150 2s exposures with Gain = 0.6 (again)

First guide: 2048 Last guide: 2155 First IRTC: 74820

20090611_00008_cube.fit*

07:54 Start guide Seq. of 150 2s exposures with Gain = 0.8

First guide: 2164 Last guide: 2268 First IRTC: 75411

20090611_00009_cube.fit*

08:00 Start guide Seq. of 150 2s exposures with Gain = 0.9 (again)

First guide: 2284 Last guide: 2384 First IRTC: 80026

20090611_000010_cube.fit*

08:06 Start guide Seq. of 150 2s exposures with Gain = 0.7 (again)

Note: cirrus again This Sequence Partailly Corrupted !

First guide: 2397 Last guide: 2446 and then we loose the star (cirrus) First IRTC: 80621

Lost star at 08:10; we close Dome

20090611_000011_cube.fit*

08:27 Re-opening

08:33 Slewing to BS9183 GS=46 (El ~ 48)

08:38 Start guide Seq. of 150 2s exposures with Gain = 0.7 (again)

First guide: 2515 Last guide: 2618 First IRTC: 83802

20090611_000012_cube.fit*

08:44 Start guide Seq. of 150 2s exposures with Gain =0.9 (again)

First guide: 2640 Last guide: 2750 First IRTC: 84427

20090611_000013_cube.fit*

08:51 Start guide Seq. of 150 2s exposures with Gain =0.5 (again)

First guide: 2768 Last guide: 2866 First IRTC: 85101

20090611_000014_cube.fit*

08:57 Start guide Seq. of 150 2s exposures with Gain = 0.8 (again)

First guide: 2887 Last guide: 2990 First IRTC: 85707

20090611_000015_cube.fit*

09:03 Start guide Seq. of 150 2s exposures with Gain = 0.6

First guide: 3007 Last guide: 3115 First IRTC: 90319

20090611_000016_cube.fit*

Offset Ra 5" Dec 5"

09:09 Start guide Seq. of 150 2s exposures with Gain =0.9 (again)

First guide: 3140 Last guide: 3244 First IRTC: 91031

20090611_000017_cube.fit*

09:16 Start guide Seq. of 150 2s exposures with Gain = 0.7

First guide: 3249 Last guide: 3353 First IRTC: 91607

20090611_000018_cube.fit*

09:21 Start guide Seq. of 150 2s exposures with Gain =0.5

First guide: 3362 Last guide: 3485 First IRTC: 92206

20090611_000019_cube.fit*

Offset Ra = -2" Dec. = -2"

09:29 Start guide Seq. of 150 2s exposures with Gain = 0.6

First guide: 3506 Last guide: 3607 First IRTC: 92957

20090611_000020_cube.fit*

09:35 Start guide Seq. of 150 2s exposures with Gain = 0.8

First guide: 3614 Last guide: 3716 First IRTC: 093538

20090611_000021_cube.fit*

09:41 Start guide Seq. of 150 2s exposures with Gain =0.9

First guide: 3725 Last guide: 3825 First IRTC: 094131

20090611_000022_cube.fit*

09:47 Start guide Seq. of 150 2s exposures with Gain =0.7

Note: some cirrus

First guide: 3837 Last guide: 3938 First IRTC: 094727

20090611_000023_cube.fit*

09:53 Start guide Seq. of 150 2s exposures with Gain =0.5

First guide: 3943 Last guide: 4050 First IRTC: 95308

20090611_000024_cube.fit*

10:00 Start guide Seq. of 150 2s exposures with Gain = 0.8

First guide: 4066 Last guide: 4164 First IRTC: 95945

20090611_000025_cube.fit*

10:06 Start guide Seq. of 150 2s exposures with Gain = 0.6

First guide: 4175 Last guide: 4276 First IRTC: 100534

20090611_000026_cube.fit*

10:11 Start guide Seq. of 150 2s exposures with Gain = 0.5

First guide: 4293 Last guide: 4392 First IRTC: 101154

20090611_000027_cube.fit*

10:18 Start guide Seq. of 150 2s exposures with Gain = 0.7

First guide: 4403 Last guide: 4500 First IRTC: 101750

20090611_000028_cube.fit*

10:24 Start guide Seq. of 150 2s exposures with Gain = 0.9

First guide: 4514 Last guide: 4619 First IRTC: 102350

20090611_000029_cube.fit*

10:32 Start guide Seq. of 150 2s exposures with Gain = 0.8

First guide: 4665 Last guide: 4761 First IRTC: 103226

20090611_000030_cube.fit*

10:38 Start guide Seq. of 150 2s exposures with Gain = 0.6

First guide: 4770 Last guide: 4865 First IRTC: 103816

20090611_000031_cube.fit*

10:44 Start guide Seq. of 150 2s exposures with Gain = 0.5

First guide: 4878 Last guide: 4970 First IRTC: 104424

20090611_000032_cube.fit*

10:50 Start guide Seq. of 150 2s exposures with Gain = 0.7

First guide: 4979 Last guide: 5071 First IRTC: 105007

20090611_000033_cube.fit*

10:56 Start guide Seq. of 150 2s exposures with Gain = 0.9

First guide: 5079 Last guide: 5190 First IRTC: 105556

20090611_000034_cube.fit*

11:03 Start guide Seq. of 150 2s exposures with Gain = 0.5

First guide: 5210 Last guide: 5300 First IRTC: 110331

20090611_000035_cube.fit*

11:10 Start guide Seq. of 150 2s exposures with Gain = 0.8

First guide: 5315 Last guide: 5405 First IRTC: 110952

20090611_000036_cube.fit*

11:16 Slew to NGC7662 GS=1 Test Exposure

Takeseq 2.0 30

First IRTC: 112152 20090611_000037_cube.fit*

Offset 10.0 10.0 Takeseq 2.0 30 First IRTC: 112343 20090611_000038_cube.fit*

11:27 Call it a night

Note: we leave Gain factor = 0.7 (more analisys to be done)

-- DavidThompson - 11 Jun 2009
I Attachment Action Size Date Who Comment
daq.20090611.gifgif daq.20090611.gif manage 46 K 08 Jul 2009 - 18:29 JohnHill Plot of Telescope and Mirror Temperatures
Topic revision: r5 - 08 Jul 2009, JohnHill
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