LUCIFER Com 3, Night 7
UT 2009 January 16

Observers: N.Ageorges, W.Seifert, M.Juette, V.Knierim, J.Hill (@LBT)
Telescope Operator: D.Gonzalez-Huerta
SW Support: P.Grenz in Tucson until 1 AM
Telescope Support: J.Rousseau

Summary:

The revised Torsten internal transformation in GCS and the Jesper external transformations in oacserver are now in good general agreement (within 1 mm over the field). The Jesper transformations are confirmed to be orthogonal. The remaining thing we are still working on is to get the rotation of the Jesper transformations correct. We are still off by a few tenths of a degree.

Volker and Marcus got the software running for the LUCIFER flexure compensation.

We found that LUCIFER was out of focus with respect to AGW. We measure a new focus constant of 31.0. The correction applied last week (35.35) seems to be wrong, or else the focus can move.

It was a gorgeous photometric night with seeing between 0.3 and 0.6 arcsec FWHM all night long. Our worst images occurred when a glint of moonlight screwed up the S-H centroids and made spurious aberrations.

We continued observing through a meridian crossing above 89 degrees elevation. The guider couldn't quite hold the star on the hot spot, but it never lost lock. Any observing up to EL=88 degrees should be OK if the telescope is in temperature equilibrium, and the pointing has been adjusted.

The telescope was well behaved. We had a few crashes of ECS subsystem while we were getting ready to open. We had one GCS hang at 19:24, and then no further problems until 5:18 AM, and 5:38 AM. We had a mysterious offset failure at 06:01. Lost time: 35 minutes.

Preparations:

Torsten has provided a new version of GCS v2.0.6 which has the PCS x-y to AGW internal transformation fixed.

16:00 I've restarted oacserver so that we are now calculating with Jesper's oacserver transformation ".....agw6".

16:05 Asking ECS for SM in Ventilation mode produces no obvious response although Michele says there is a message in syslog. Stopping and restarting ECS didn't help. See Issue #1959.

16:30 Volker and Marcus are working on LUCIFER automatic flexure compensation.

Details

Open

17:15 Open dome - T=3.5 degC, D=-20 degC, wind (LBTO) 4 m/sec from WSW. Sky is photometric.

Flats

17:19 Ready for LUCIFER flats at zenith

17:53 Turned on Left Mirror Ventilation. We started with SX mirror at +1.8 degC. Note that we are not running Right Mirror Ventilation because of Chiller problems (Issue #1957), and we have not been opening the Right Shutter Door in order to preserve the one remaining drive for LBC work (Issue #1956).

17:57 ECS crashes (Neither Paul nor Michele were available by phone, so we restart without further diagnostics.) See also David's earlier note on Issue #1115.

18:00 Restart ECS, turn off dome lights (that should have been off before), open vent doors.

Flexure Compensation Software Tests

18:30 Volker and Marcus are working on LUCIFER automatic flexure compensation.

We are starting with GCS v2.0.6 with internal_transformation=true and oacserver has Jesper transformation ...agw6.

18:39 preset TRACK

18:44 preset TRACK

18:44 preset TRACK

Still have M1 and M2 at +2.8 mm Y global compared to their nominal positions. Apply Z7=-4000 to put M1 at a decent starting position.

18:56 preset TRACK

19:17 preset TRACK

19:24 preset TRACK - GCS hung

19:28 kill and restart GCSL

We have lost the Polycom connection to Paul in Tucson. The unit here at the TO-station doesn't get a network connection for some minutes after we cycle the unit.

Looking for stars....

19:33 preset TRACK PARALLACTIC Adjust *IE= CA= *

19:37 preset ACTIVE - succeeded on a highly comatic image with star found at 297,333 (x=31.1 y=122.7)

19:39 FCin=0 for Z11/Z22

19:45 After a bit of collimation, the guider image is 0.4 arcsec FWHM.

19:47 FCin=1 for Z11/Z22

19:49 focus 0 from IRAF to offload M2 corrections. This unloading of a few thousand nm Z7 left a bit of residual coma, so the WF jumped up to 800 nm rms.

Offset and Absorbing Tests

19:58 Image on guider are 0.40 x 0.36 arcsec FWHM (slightly elongated in X-direction). WF correction is hunting between 300 and 400 nm rms, so probably still some residual dome seeing. Right Shutter Door is closed, but Vent Doors are open. Wind (LBTO) is only 2 m/sec. Polaris monitor is reporting 1.0 arcsec seeing.

20:12 Guide star starts drifting away from the hotspot. This is because we are at EL=89.0 deg crossing zenith. GCS is making syslog messages complaining about this, but there are no obvious warnings or events visible. The good news is that while the star drifted a few arcsec, the guider never lost it out of the box. Everything is recovered by the time we are back down to 88.5 degrees on the other side. Dave A. says that he can do better, but the mount performance is already impressive.

More LUCIFER software work on flexure compensation

While Marcus and Volker are working on the flexure compensation software. John is keeping track of active optics and guiding to study offloading and dome seeing effects.

21:09 The last stepFocus was at 20:23, so in half an hour we have built up corrections of X=-0.574 Y=+1.349 Z=-0.300 RX=-140.6 RY=-59.8 on M2

21:11 focus 0 from IRAF (and Volker issued an offset in the middle of my stepFocus - this produced some warnings, but the end result was OK)

Guider corrections in this active mode observing with FCin=1 for Z11/Z22.
Jan 15 21:17:46 lbtmu102 LBT_PCS: Centroid Xarcs: 129.601821635786564 Yarcs: 168.065350508555696 Xmm: 77.761093139648438 Ymm: 100.839210510253906
Jan 15 21:17:52 lbtmu102 LBT_PCS: Centroid Xarcs: 129.697341655123495 Yarcs: 167.809028284142187 Xmm: 77.818405151367188 Ymm: 100.685417175292969
Jan 15 21:17:58 lbtmu102 LBT_PCS: Centroid Xarcs: 129.774805440773235 Yarcs: 167.995783146229741 Xmm: 77.864883422851562 Ymm: 100.797470092773438
Jan 15 21:18:04 lbtmu102 LBT_PCS: Centroid Xarcs: 129.654108419534367 Yarcs: 167.900924341084163 Xmm: 77.792465209960938 Ymm: 100.740554809570312
Jan 15 21:18:10 lbtmu102 LBT_PCS: Centroid Xarcs: 129.680289958380854 Yarcs: 167.931073165078828 Xmm: 77.808174133300781 Ymm: 100.758644104003906
Jan 15 21:18:17 lbtmu102 LBT_PCS: Centroid Xarcs: 129.700660441737853 Yarcs: 167.929890608928901 Xmm: 77.820396423339844 Ymm: 100.757934570312500
Jan 15 21:18:24 lbtmu102 LBT_PCS: Centroid Xarcs: 129.742850993409832 Yarcs: 167.924689905000662 Xmm: 77.845710754394531 Ymm: 100.754814147949219
Jan 15 21:18:31 lbtmu102 LBT_PCS: Centroid Xarcs: 129.764543905149566 Yarcs: 168.009414331097844 Xmm: 77.858726501464844 Ymm: 100.805648803710938
Jan 15 21:18:38 lbtmu102 LBT_PCS: Centroid Xarcs: 129.646301005813257 Yarcs: 167.883669193821078 Xmm: 77.787780761718750 Ymm: 100.730201721191406
Jan 15 21:18:45 lbtmu102 LBT_PCS: Centroid Xarcs: 129.736747477797252 Yarcs: 167.838414168685262 Xmm: 77.842048645019531 Ymm: 100.703048706054688
Jan 15 21:18:51 lbtmu102 LBT_PCS: Centroid Xarcs: 129.740053548754076 Yarcs: 167.850672062540553 Xmm: 77.844032287597656 Ymm: 100.710403442382812
Jan 15 21:18:57 lbtmu102 LBT_PCS: Centroid Xarcs: 129.764798218300086 Yarcs: 168.084347700899855 Xmm: 77.858879089355469 Ymm: 100.850608825683594
Jan 15 21:19:03 lbtmu102 LBT_PCS: Centroid Xarcs: 129.672647848207589 Yarcs: 167.832234359127540 Xmm: 77.803588867187500 Ymm: 100.699340820312500
Jan 15 21:19:09 lbtmu102 LBT_PCS: Centroid Xarcs: 129.718335205699276 Yarcs: 167.956453617501154 Xmm: 77.831001281738281 Ymm: 100.773872375488281
Jan 15 21:19:21 lbtmu102 LBT_PCS: Centroid Xarcs: 129.750353231350317 Yarcs: 167.906010604094661 Xmm: 77.850212097167969 Ymm: 100.743606567382812
Jan 15 21:19:28 lbtmu102 LBT_PCS: Centroid Xarcs: 129.689508810087347 Yarcs: 168.004277205457271 Xmm: 77.813705444335938 Ymm: 100.802566528320312
Jan 15 21:19:34 lbtmu102 LBT_PCS: Centroid Xarcs: 129.691416158716294 Yarcs: 167.908273991134308 Xmm: 77.814849853515625 Ymm: 100.744964599609375
Jan 15 21:19:40 lbtmu102 LBT_PCS: Centroid Xarcs: 129.687665039746065 Yarcs: 167.904878910574809 Xmm: 77.812599182128906 Ymm: 100.742927551269531
Jan 15 21:19:46 lbtmu102 LBT_PCS: Centroid Xarcs: 129.775708252457576 Yarcs: 167.939643518251501 Xmm: 77.865425109863281 Ymm: 100.763786315917969
Jan 15 21:19:53 lbtmu102 LBT_PCS: Centroid Xarcs: 129.692255392113026 Yarcs: 167.983487105401906 Xmm: 77.815353393554688 Ymm: 100.790092468261719
Jan 15 21:19:59 lbtmu102 LBT_PCS: Centroid Xarcs: 129.697990153657344 Yarcs: 167.939185754580564 Xmm: 77.818794250488281 Ymm: 100.763511657714844
Jan 15 21:20:07 lbtmu102 LBT_PCS: Centroid Xarcs: 129.712244405744229 Yarcs: 167.876853601387040 Xmm: 77.827346801757812 Ymm: 100.726112365722656
Jan 15 21:20:15 lbtmu102 LBT_PCS: Centroid Xarcs: 129.716376994440253 Yarcs: 167.990455285726256 Xmm: 77.829826354980469 Ymm: 100.794273376464844
Jan 15 21:20:22 lbtmu102 LBT_PCS: Centroid Xarcs: 129.675725037328931 Yarcs: 167.862612064957659 Xmm: 77.805435180664062 Ymm: 100.717567443847656
Jan 15 21:20:28 lbtmu102 LBT_PCS: Centroid Xarcs: 129.715423320125780 Yarcs: 167.866770084968749 Xmm: 77.829254150390625 Ymm: 100.720062255859375
Jan 15 21:20:34 lbtmu102 LBT_PCS: Centroid Xarcs: 129.750442240952992 Yarcs: 167.941665307798161 Xmm: 77.850265502929688 Ymm: 100.764999389648438
Jan 15 21:20:40 lbtmu102 LBT_PCS: Centroid Xarcs: 129.694518779152673 Yarcs: 167.883936222629131 Xmm: 77.816711425781250 Ymm: 100.730361938476562
Jan 15 21:20:47 lbtmu102 LBT_PCS: Centroid Xarcs: 129.737828308686971 Yarcs: 167.987467106207589 Xmm: 77.842697143554688 Ymm: 100.792480468750000
Jan 15 21:20:53 lbtmu102 LBT_PCS: Centroid Xarcs: 129.709612264636291 Yarcs: 167.912292138912591 Xmm: 77.825767517089844 Ymm: 100.747375488281250
Jan 15 21:21:00 lbtmu102 LBT_PCS: Centroid Xarcs: 129.663238261638185 Yarcs: 167.950922306477253 Xmm: 77.797943115234375 Ymm: 100.770553588867188
Jan 15 21:21:07 lbtmu102 LBT_PCS: Centroid Xarcs: 129.714482361468839 Yarcs: 167.923952396864138 Xmm: 77.828689575195312 Ymm: 100.754371643066406
Jan 15 21:21:14 lbtmu102 LBT_PCS: Centroid Xarcs: 129.726765686639169 Yarcs: 168.018328007023740 Xmm: 77.836059570312500 Ymm: 100.810997009277344
Jan 15 21:21:20 lbtmu102 LBT_PCS: Centroid Xarcs: 129.645105734005796 Yarcs: 168.021672224953136 Xmm: 77.787063598632812 Ymm: 100.813003540039062
Jan 15 21:21:26 lbtmu102 LBT_PCS: Centroid Xarcs: 129.707094564446123 Yarcs: 167.907485620367680 Xmm: 77.824256896972656 Ymm: 100.744491577148438
Jan 15 21:21:33 lbtmu102 LBT_PCS: Centroid Xarcs: 129.712371562319504 Yarcs: 167.878341333317593 Xmm: 77.827423095703125 Ymm: 100.727005004882812
Jan 15 21:21:39 lbtmu102 LBT_PCS: Centroid Xarcs: 129.734255208922121 Yarcs: 167.950757002929407 Xmm: 77.840553283691406 Ymm: 100.770454406738281
Jan 15 21:21:45 lbtmu102 LBT_PCS: Centroid Xarcs: 129.669278198963127 Yarcs: 167.988713240645183 Xmm: 77.801567077636719 Ymm: 100.793228149414062
Jan 15 21:21:53 lbtmu102 LBT_PCS: Centroid Xarcs: 129.719848368944923 Yarcs: 167.905667281341437 Xmm: 77.831909179687500 Ymm: 100.743400573730469
Jan 15 21:21:59 lbtmu102 LBT_PCS: Centroid Xarcs: 129.735933675715586 Yarcs: 167.956974959459728 Xmm: 77.841560363769531 Ymm: 100.774185180664062
Jan 15 21:22:06 lbtmu102 LBT_PCS: Centroid Xarcs: 129.721501404423321 Yarcs: 167.908261275476804 Xmm: 77.832901000976562 Ymm: 100.744956970214844
Jan 15 21:22:12 lbtmu102 LBT_PCS: Centroid Xarcs: 129.787126912916136 Yarcs: 167.896918908963414 Xmm: 77.872276306152344 Ymm: 100.738151550292969
Jan 15 21:22:18 lbtmu102 LBT_PCS: Centroid Xarcs: 129.750022624254626 Yarcs: 168.000475223856910 Xmm: 77.850013732910156 Ymm: 100.800285339355469
Jan 15 21:22:24 lbtmu102 LBT_PCS: Centroid Xarcs: 129.636064901504653 Yarcs: 167.925478275767290 Xmm: 77.781639099121094 Ymm: 100.755287170410156
Jan 15 21:22:31 lbtmu102 LBT_PCS: Centroid Xarcs: 129.699579610848104 Yarcs: 167.955232914378627 Xmm: 77.819747924804688 Ymm: 100.773139953613281
Jan 15 21:22:36 lbtmu102 LBT_PCS: Centroid Xarcs: 129.752540324444823 Yarcs: 167.971241927204147 Xmm: 77.851524353027344 Ymm: 100.782745361328125
Jan 15 21:22:44 lbtmu102 LBT_PCS: Centroid Xarcs: 129.680175517463113 Yarcs: 167.963103906387374 Xmm: 77.808105468750000 Ymm: 100.777862548828125
Jan 15 21:22:51 lbtmu102 LBT_PCS: Centroid Xarcs: 129.742266073163620 Yarcs: 167.917937890854233 Xmm: 77.845359802246094 Ymm: 100.750762939453125
Jan 15 21:22:58 lbtmu102 LBT_PCS: Centroid Xarcs: 129.681396220585640 Yarcs: 167.948557194177369 Xmm: 77.808837890625000 Ymm: 100.769134521484375
Jan 15 21:23:05 lbtmu102 LBT_PCS: Centroid Xarcs: 129.749984477282055 Yarcs: 167.897821720647755 Xmm: 77.849990844726562 Ymm: 100.738693237304688
Jan 15 21:23:11 lbtmu102 LBT_PCS: Centroid Xarcs: 129.693933858906490 Yarcs: 167.957559879705940 Xmm: 77.816360473632812 Ymm: 100.774536132812500
Jan 15 21:23:17 lbtmu102 LBT_PCS: Centroid Xarcs: 129.685058329953165 Yarcs: 167.896779036730607 Xmm: 77.811035156250000 Ymm: 100.738067626953125
Jan 15 21:23:23 lbtmu102 LBT_PCS: Centroid Xarcs: 129.783452087891050 Yarcs: 167.917136804430100 Xmm: 77.870071411132812 Ymm: 100.750282287597656

21:18 nearly 10 minutes and 10 offsets later, the next WF correction is 1886 nm rms. (65 microns of M2 focus motion) That is probably limited by the accuracy of the Elevation Lookup Table over that long time.

Wavefront corrections over that same timeframe.
Jan 15 21:10:49 lbtmu105 LBT_PSFL: ACTOPT: Primary Zernikes 0 0 0 -275.47 -142.454 0 0 29.0577 71.0706 34.1394 0 0 0 0 0 0 0 0 0 0 0
Jan 15 21:17:39 lbtmu105 LBT_PSFL: ACTOPT: Primary Zernikes 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Jan 15 21:18:30 lbtmu105 LBT_PSFL: ACTOPT: Primary Zernikes 0 0 0 -19.4135 -138.222 0 0 6.34855 118.659 17.2259 0 0 0 0 0 0 0 0 0 0 0
Jan 15 21:19:20 lbtmu105 LBT_PSFL: ACTOPT: Primary Zernikes 0 0 0 -45.0672 -22.1945 0 0 7.58414 27.8888 -0.141902 -0 0 0 0 -0 -0 -0 -0 -0 0 5.73307
Jan 15 21:20:14 lbtmu105 LBT_PSFL: ACTOPT: Primary Zernikes 0 0 0 100.241 24.0082 0 0 28.9238 -37.4774 3.98995 -0 0 0 0 -0 0 -0 -0 -0 0 19.261
Jan 15 21:21:06 lbtmu105 LBT_PSFL: ACTOPT: Primary Zernikes 0 0 0 18.9316 170.072 0 0 63.0613 88.985 -10.5602 0 0 0 0 0 0 0 0 0 0 0
Jan 15 21:21:58 lbtmu105 LBT_PSFL: ACTOPT: Primary Zernikes 0 0 0 -127.395 -89.909 0 0 -46.6569 44.9144 -5.68146 0 0 0 0 0 0 0 0 0 0 0
Jan 15 21:22:50 lbtmu105 LBT_PSFL: ACTOPT: Primary Zernikes 0 0 0 95.345 -150.972 0 0 -36.6644 -89.0879 -0.0931009 0 0 0 0 0 0 0 0 0 0 0
Jan 15 21:23:45 lbtmu105 LBT_PSFL: ACTOPT: Primary Zernikes 0 0 0 -98.407 71.514 0 0 -30.7437 4.89906 -16.6165 0 0 0 0 0 0 0 0 0 0 0
Jan 15 21:24:40 lbtmu105 LBT_PSFL: ACTOPT: Primary Zernikes 0 0 0 28.5056 34.8421 0 0 24.6313 -8.50164 -0.477452 0 0 0 0 0 0 0 0 0 0 0

21:34 editted oacontrol.conf.sfpagw6a to include the zeropoint offsets suggested by Jesper this morning, and install it in oacontrol.conf. (oacserver not yet restarted)

21:45 Kill and restart oacserver to absorb the oacontrol.conf.sfpagw6a information.

21:53 preset ACTIVE - succeeded
Torsten and Jesper transformations are getting very close.
Jan 15 21:53:21 lbtmu107 LBT_left_GCS: AGWUnitAIP: internal transformation to AGW native coords: -31.634899, 489.601083 mm
Jan 15 21:53:21 lbtmu107 LBT_left_GCS: AGWUnitAIP: external transformation to AGW native coords: -32.086291, 490.377570 mm (oacontrol)

21:59 preset ACTIVE - failed because guiding not stable. Star (binary?) in acquire000003 is at 459,372 (x=-122.7 y=31.0) but pointing has not been updated in quite some time.
Why did it fail? First guider image is 1082. After the acquisition offset, the star was just outside the lower left corner of the guide box, and apparently it couldn't pull it in.
Thu Jan 15 21:57:46.732 2009  Preset command started for left LUCIFER mode ACTIVE from IIF
Thu Jan 15 21:59:28.928 2009  Preset alert for left LUCIFER mode ACTIVE: left PMC Mirror GoToPositionAbs Command Complete
Thu Jan 15 21:59:28.958 2009  Preset alert for left LUCIFER mode ACTIVE: Ok
Thu Jan 15 21:59:28.981 2009  Preset alert for left LUCIFER mode ACTIVE: Ok
Thu Jan 15 21:59:29.011 2009  Preset alert for left LUCIFER mode ACTIVE: guiding was not stable within 6 cycles
Thu Jan 15 21:59:29.063 2009  Preset command failed for left LUCIFER mode ACTIVE from IIF

22:05 preset ACTIVE - retrying with a different guide star succeeded. Star in acquire000004 is at 468,327.

22:10 making rotator angle offsets (or something like that), so guide star is lost on purpose. IIF says guiding is lost, and GCS syslog agrees, but GCSGUIs are still displaying a star image (not the usual behaviour of GCSGUI). Does PCS update the guidestar coordinates on a rotation offset?

Resume commissioning spectroscopy observing on-sky

22:26 preset ACTIVE - succeeded 04:30:49 +64:50:52
Jan 15 22:25:51 lbtmu107 LBT_left_GCS: AGWUnitAIP: internal transformation to AGW native coords: 4.609879, 496.721863 mm
Jan 15 22:25:51 lbtmu107 LBT_left_GCS: AGWUnitAIP: external transformation to AGW native coords: 4.219335, 497.455713 mm (oacontrol)

22:35 Seeing on guider is "degraded" to 0.5 arcsec FWHM at EL=55 deg. WF rms varying between 200 and 400 nm. Polaris monitor is reporting 2 arcsec.

22:45 LUCIFER is seeing apparent focus variations from one 2-sec integration to the next. Guide star image is showing some motion (few tenths of arcsec), but not any obvious focus changes. On the 1-minute active optics timescale, we are sending Z4 corrections of up to 100 nm. WFS rms is still in the range of 200-300 nm rms. a remarka Is this defocus caused by a slight mis-focus between LUCIFER and AGW? Present conditions are better than when the focus was measured last week.

Analysis of guider images by Dave T. the next day

The guider sees 0.45 arcsec FWHM and nice and stable. Over the time interval plotted, the guider was taking 2.0 second exposures (and it was a very bright star). I plotted both the FWHM in arcsec and the "roundness" from starfind on the same plot. 22:30-23:10 FWHM is 0.43 to 0.48 arcsec p-v. Roundness averages about 0.08 with peak of 0.24.

As for centroids, the stats over the 493 exposures in the time interval plotted above are 1.23 and 1.34 pixels rms (66 and 72 mas), consistent with the guided data in tests 3a and 3b the other day. There are no outliers on this plot, and the full box is only 20 pixels square or 1.08 arcsec.

23:01 Accumulated focus correction on M2 in the last 30-minutes is -0.035 mm. So in the long term, the focus stability is impressively good.

AGW transformation tests

23:08 preset ACTIVE - succeeds, but WFS images have some bright glint in them and are apparently giving bogus corrections. The image has loads of astigmatism despite an rms below 200 nm. See wfs images starting at 000153. See wfs 000160 for a example where stray background light is making 1 arcsec of bogus astigmatism in the active correction. These images seem to have an enormously bright (saturated) star-like image on the left side of the WFS image.

23:21 preset ACTIVE - to another star with different moon angle. The spurious astigmatism was quickly dialed out. Now we have 0.45 arcsec images that look round again. Typically GCS measures them as 0.46x0.43 arcsec.

23:28 making offsets now using the Torsten internal transformations.

23:35 edit AIP_L.cfg to set internal_transformation=false. stop guiding, selectAGW

23:36 preset ACTIVE again - now using Jesper's agw6a transformations.
Jan 15 23:36:54 lbtmu107 LBT_left_GCS: AGWUnitAIP: rotation of the AGW coords system in relation to SFP: 179.70 degrees
Jan 15 23:36:54 lbtmu107 LBT_left_GCS: AGWUnitAIP: internal transformation to AGW native coords: -3.482662, 508.125909 mm
Jan 15 23:36:54 lbtmu107 LBT_left_GCS: AGWUnitAIP: external transformation to AGW native coords: -3.839724, 508.819021 mm (oacontrol)
Jan 15 23:36:54 lbtmu107 LBT_left_GCS: AGWUnitAIP: moving probe to native coords: -3.839724, 508.819021 mm using external transformations

LUCIFER focussing

23:46 Walter has just analyzed an internal LUCIFER focus sequence, and found that he is significantly out of focus compared to the telescope.

23:48 Changed focus in AIP_L.cfg from 35.35 back to the previous IRTC value of 31.6.

23:49 preset ACTIVE - the first active correction was +463 nm Z4, and the second was 48 nm Z4.

00:03 Focus looks much better in this situation.

Back to transformation testing (analyzing data from one test while doing the next)

00:11 edit AIP_L.cfg to set internal_transformation=true . stop guiding, selectAGW to get Torsten's transformation

00:12 preset ACTIVE followed by 4 offsets

Back to focussing

00:21 Changed focus in AIP_L.cfg from 31.6 back to the previous IRTC value of 31.0.

00:22 preset ACTIVE

Adopted 31.0 mm as the new LUCIFER-AGW focus.
luci_20090115_foc_0001 -- 0007 with the AGW focus at the actual position of 35.6mm
luci_20090115_foc_0008 - 0014.fits with the AGW at 31.6mm
luci_200901_foc_0015 - 0021.fits AGW at 31.0mm
The focus steps start at -405 in steps of 20.
You see from the last measurements that we are close to the -350 position, but still somewhat below.

Back to the PR galaxy

00:31 preset ACTIVE

Here the log takes a break while John takes a shower and the LUCIFERians have some pizza. However, observing continues with the script.

01:25 preset ACTIVE to get some standard stars and extinction coefficients. The guider image looks a bit elliptical at this position (0.7x0.5 arcsec). Is it because the array of WFS spots is faint compared to the background on the WFS image? Can a near uniform background (no glints) make a false astigmatism signal? Indeed this star is quite faint.

Jan 16 01:35:03 lbtmu107 LBT_left_GCS: WFS: maxPeak: 1311, bkgrd: 1021
Jan 16 01:35:03 lbtmu107 LBT_left_GCS: WFS: couldn't adjust exposure time to 2068966 ms as the maximum is defined as 30000.
Jan 16 01:35:03 lbtmu107 LBT_left_GCS: WFS: trying to estimate counts for maximum exposure time 30000 ms.
Jan 16 01:35:03 lbtmu107 LBT_left_GCS: WFS: estimated counts would be 290.
Jan 16 01:35:03 lbtmu107 LBT_left_GCS: WFS: estimated counts would exceed limits. Unable to adjust exposure time.

Walter's result is that ....agw6a seems to be rotated in the wrong direction relative to agw3, even though we expected it to match agw4.

01:44 editted oacontrol.conf.sfpagw7a to include the zeropoint offsets suggested by Jesper this morning, and install it in oacontrol.conf. (oacserver not yet restarted) (These are really the zeropoints relevant to agw6, but they are the same within a few tenths of mm.

01:44:51 preset ACTIVE failed - couldn't find star. The star in acquire000014 is only 75 counts above background even in this good seeing.

01:55 preset ACTIVE

02:23 FCin=0, clear C00

02:24 kill and restart oacserver

02:25 internal_transformation=false

02:26 preset ACTIVE - couldn't find a star (nothing in the image)

02:30 preset TRACK PARALLACTIC Adjust IE=70.3 CA=-5.6

Back to transformation testing

02:38 preset ACTIVE - succeeded although the star is faint

02:44 FCin=1 for Z11,Z22

02:46 Taking offset data with ...agw7a

This data seems closer to the final rotation angle of the transform that we need, but still off by a pixel or so in 1650. Walter sent the centroids to Jesper for a sea level analysis. #6 is in y-direction off by 3.4 pixels #7 still by 1.3 pix.

Some more spectral observations

02:54 preset ACTIVE - succeeded at EL=73 deg, star at 394,377 in acquire000019

Taking spectrophotometric standards through wide slits.

03:03 Power-cycle rebooted the conference room polycom. I can ping it from Tucson.

03:14 Seeing on the guider was down below 0.4 arcsec for about 10 minutes, but now has drifted back up to 0.5 arcsec at EL=77 deg. I guess we can live with the bad seeing being 0.5 arcsec.

03:40 guide star is frequently 0.48 x 0.32 arcsec FWHM elongated in the X-direction. I'm not able to distinguish whether this is transient aberration, or seeing or vibration, but it certainly has a preferred direction. The shape changes more frequently than the 52 sec cycle time of the active optics, so I don't think it is varying aberration from the WFS. On the other hand, a small amount of residual aberration from the off-axis WFS could convolve with seeing to make these variable shapes. This particular guide star is faint, so that could make residual astigmatism if the background subtraction is imperfect. GCS and IDL still agree on the answers.

#   /Users/dlmiller/lbto/data/agw_data/090116w
#       file                 time       rot     alt     az     probeX probeY  zRMSall  zRMShex  zRMShex  sent
 wfscimage000336_dd.fits 10:52:46.68   71.40   84.84  123.56 -14.63   79.02    763    755    762   0
 wfscimage000337_dd.fits 10:53:41.59   70.15   85.00  124.91 -14.63   79.02    422    415    421   0
 wfscimage000338_dd.fits 10:54:37.92   68.79   85.16  126.38 -14.63   79.02    265    212    263   0
 wfscimage000339_dd.fits 10:55:32.18   67.38   85.31  127.89 -14.63   79.02    255    215    255   0
 wfscimage000340_dd.fits 10:56:28.51   65.82   85.46  129.56 -14.63   79.02    143    129    141   0
 wfscimage000341_dd.fits 10:57:28.29   64.06   85.62  131.45 -14.63   79.02    228     43    228   0
 wfscimage000342_dd.fits 10:58:21.51   62.36   85.76  133.25 -14.63   79.02    277    246    276   0
 wfscimage000343_dd.fits 10:59:14.63   60.53   85.89  135.18 -14.63   79.02    210    197    206   0
 wfscimage000344_dd.fits 11:00:10.43   58.50   86.03  137.32-14.63   79.02    227    226    227   0

Doug M. wrote later: "This was the only set of more than 5 wfsc images on the same guide star. All the wfsc images look the same, around 0.5" seeing. The Shack-Hartmann spots look round, but we would not be able to see even a 25% elongation with this low of seeing. Note, the telescope was at an elevation of 85 degree and the azimuth was changing by about 1 degree per minute. From the wfsc (an my) point of view, the collimation looks great."

03:55 GCS is up to 1360 MB of virtual memory after running for 8.5 hours.

03:57 About 30% of the guider images are below 0.4 arcsec FWHM in both axes.

04:00 The moonlit sky still looks photometric here although we see some thin radar echoes drifting over Tucson and Benson.

04:01 Lose guide star to the calibration unit.

04:38 install oacontrol.conf.sfpagw8 which Jesper just sent us to have a refined rotation angle. (oacserver not yet restarted.)

04:39 In this 0.4 arcsec seeing, it seems clear that the aberrations are a bit worse (0.5 arcsec seeing) just after an offset. (e.g. the offset and step focus that happened just now at 04:39:01). It must be coming from focus or coma since the Zernikes sent to the primary don't show significant aberration.

04:47 Guide image is 0.34 x 0.28 arcsec, and generally less than 0.35 for several minutes. Of course, we are doing spectroscopy with a 10 arcsec wide slit. WFS residuals are running between 200 and 400 nm rms.

04:53 The accumulated active corrections on M2 since the last stepFocus at 04:46 are:
X=-0.016 Y=+0.253 Z=-0.070 RX=-26.3 RY=-11.2

04:58 preset ACTIVE failed - couldn't find star. Star was above the upper right corner of acquire000020.

05:00 preset TRACK PARALLACTIC - Adjust IE=+55.3 CA=-12.3

05:03 preset ACTIVE - succeeded, but image had focus and coma to 1 arcsec after this preset (2481 nm rms split between Z7 and Z8). First correction gets image to 0.52 x 0.48 arcsec, Second correction gets to 0.45 x 0.43 arcsec. I think this coma comes from residuals in the collimation table between 87 degrees and 77 degrees EL. We are talking about 200 microns in the relative positions of M1 and M2, and the high EL end of the curve is not well-defined.. The X-coma got adjusted out a few minutes later like it was a hysteresis effect.

05:17 GCS stops getting guide images, and the offset command hung
Jan 16 05:18:17 lbtmu107 LBT_left_GCS: receivng AzCam image: socket was closed when receiving.
Jan 16 05:18:17 lbtmu107 LBT_left_GCS: IST: error when receiving image
Jan 16 05:18:17 lbtmu107 LBT_left_GCS: IST: closing open socket
Jan 16 05:18:17 lbtmu107 LBT_left_GCS: IST: socket closed
Jan 16 05:18:17 lbtmu107 LBT_left_GCS: IST: connect accepted!
Jan 16 05:18:17 lbtmu107 LBT_left_GCS: AzCam: IST reported error while receiving image.
Jan 16 05:18:17 lbtmu107 LBT_left_GCS: error: GuidingThread: guide image didn't arrive within timeout of 2888 ms.

05:20 Kill GCS, kill oacserver, restart oacserver, restart GCS.

Now we are using oaccontrol.conf.sfpagw8

05:21 preset ACTIVE

Another GCS AZCam problemwith a hung offset.
Jan 16 05:38:53 lbtmu107 LBT_left_GCS: receivng AzCam image: socket was closed when receiving.
Jan 16 05:38:53 lbtmu107 LBT_left_GCS: IST: error when receiving image
Jan 16 05:38:53 lbtmu107 LBT_left_GCS: IST: closing open socket
Jan 16 05:38:53 lbtmu107 LBT_left_GCS: IST: socket closed
Jan 16 05:38:53 lbtmu107 LBT_left_GCS: IST: connect accepted!
Jan 16 05:38:53 lbtmu107 LBT_left_GCS: AzCam: IST reported error while receiving image.
Jan 16 05:38:53 lbtmu107 LBT_left_GCS: error: GuidingThread: guide image didn't arrive within timeout of 2888 ms.

05:41 Kill GCSL. stopAGW, startAGw, home motors, restart GCSL

Note that for spectroscopy, it would be useful to be able to resume the previous preset without clearing the offsets when something like this happens.

05:44 preset ACTIVE - succeeded

05:56 seeing on guider is fluctuating between 0.4 and 0.6 arcsec.

06:00 Guider loses star because probe couldn't move to position. Was this an AGW error?
Fri Jan 16 06:00:57.406 2009  Offset command started for left LUCIFER from IIF
Fri Jan 16 06:02:02.361 2009  Offset alert for left LUCIFER: couldn''t move probe to position (SFP) -9.70123, 79.371, focus: 27.8201 :AGw command status: timed out waiting for probe to reach destination
Fri Jan 16 06:02:02.377 2009  Offset alert for left LUCIFER: couldn''t move probe to position (SFP) -9.70123, 79.371, focus: 27.8201 :AGw command status: timed out waiting for probe to reach destinationerror: setProbePosition: couldn''t move probe to position (SFP) (x,y,z): -9.70123, 79.371, 27.8201 mm.
Fri Jan 16 06:02:02.398 2009  Offset alert for left LUCIFER: oacontrol indicated an error moving to new position
Fri Jan 16 06:02:02.417 2009  Offset alert for left LUCIFER: timed out waiting for probe to reach destination

From the GCS syslog:
Jan 16 06:01:02 lbtmu107 LBT_left_GCS: AGWUnitAIP: SFP position to move to: -9.701225, 79.370955 mm
Jan 16 06:01:02 lbtmu107 LBT_left_GCS: AGWUnitAIP: rotation of the AGW coords system in relation to SFP: 179.70 degrees
Jan 16 06:01:02 lbtmu107 LBT_left_GCS: AGWUnitAIP: internal transformation to AGW native coords: 9.285504, 532.779337 mm
Jan 16 06:01:02 lbtmu107 LBT_left_GCS: AGWUnitAIP: external transformation to AGW native coords: 9.378801, 533.403829 mm (oacontrol)
Jan 16 06:01:02 lbtmu107 LBT_left_GCS: AGWUnitAIP: moving probe to native coords: 9.378801, 533.403829 mm using external transformations
Jan 16 06:01:02 lbtmu107 LBT_left_GCS: AGWUnitAIP::doSetProbePosition: calling oacontrol::setxy(10.144.0.64, 0, x:9.378801 y:533.403829, 23.000000, 0) ...
Jan 16 06:01:07 lbtmu107 LBT_left_GCS: btr = 1
Jan 16 06:02:01 lbtmu107 LBT_left_GCS: setting focus to 27.820075 mm
Jan 16 06:02:02 lbtmu107 LBT_left_GCS: AGWUnit: timeout occured waiting for probe to reach destination. pthread_kill result is 0
Jan 16 06:02:02 lbtmu107 LBT_left_GCS: AGWUnit: cancelling worker thread: -1359017040
Jan 16 06:02:02 lbtmu107 LBT_left_GCS: AGWUnit: cancellation succeeded.
Jan 16 06:02:02 lbtmu107 LBT_left_GCS: error: setProbePosition: couldn't move probe to position (SFP) (x,y,z): -9.701225, 79.370955, 27.820075 mm.
Jan 16 06:02:02 lbtmu107 LBT_left_GCS: offsetGuiding command failed as probe couldn't be moved on new position.
Jan 16 06:02:02 lbtmu107 LBT_left_GCS: GCSL:offsetGuiding execution time: 60378 ms at 1232110922261
Jan 16 06:02:02 lbtmu107 LBT_left_GCS: GCSL:pauseGuiding executed

06:07 resend preset - We didn't kill any subsystems on this occasion.

06:23 preset ACTIVE

06:45 preset ACTIVE

It appears that ....agw8 has over corrected this rotation of the transformation. Based on offsets measured in the last hour. This should be confirmed in the light of day.

06:55 WFS is becoming swamped by oncoming twilight.

07:00 move to zenith for sky flats.

Close

07:15 Close Dome, T=+1 degC, D=-25 degC, wind calm, sky photometric.

-- JohnHill - 15 Jan 2009

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Topic revision: 18 Jan 2009, JohnHill
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