UT 20130124 Technical Observing

Observer: DMiller (LBTO) JHill (Tucson)
Telescope Operator: SAllanson (LBTO)
Additional AO Support: DMiller (LBTO)
Telescope Support: JLittle (LBTO)
Instrument Support: TShih (LBTO)

Summary

Worked on the MODS1 collimation problems (Issues 4148 & 4439) which seem to be caused by mispositioning of the pupil in the presence of vignetting.

Took a set of pointing data to go with the improved (pointing-free, binodal-free) SX collimation models.

Took SX data to characterize AdSec astigmatism hysteresis. Closed for heavy clouds at 09:30 UT.

Details

Open

01:00 Open Chamber

MODS1 Active Optics (Issue 4148 and Issue 4439)

01:05 Problems getting MODS1 guider image. Steve reset AzCam computer. OK

01:15 Preset to M5. Set pointing. Preset ACTIVE to BS9107. Collimate. Seeing ~1.0+

01:25 Turn on high order Z12-22. Not clear if it helped. Add 700+ Z22 (probably due to temp gradient on primary)

01:30 Turn off high order corrections

01:39 preset to off-axis guide star 36 to see if we see the tail. No

01:45 preset to another, no tail. We are at 78 elevation

01:50 preset to BS9122 at 41 el.

02:00 preset to off-axis guide star. center left part of patrol field.
  • z7 +147 +41 -6 +21
  • z8 -91 -122 -95 +39

02:05 preset to far off axis star on Y-axis. No tail
  • z7 -133 32
  • z8 26 28
  • z9 -72 -146
  • z10 -147 -51

02:20 change wfs_hotspot_x to 377 so pupil shift one subap. The collimation then diverged. Put hotspot back to 381 but could not recover. Had to clear active optics on primary and secondary. Collimated properly. Seeing now ~1.5"

MODS1 Pointing Model Data - for the Ashby3 collimation model

02:53 Steve started pointing log: /home/telescope/PointingLogs/20130124_SX.log

03:05 ptmodel_collect

04:14 star #16, wt10_316 probably used the wrong guide star

04:14 star #17, ACT0214 has a star near the guide star so coordinates may be bad (average of the two)

Star Name Target Star GStar WFSC Image
1 WT10_379 1 1 left_wfscimage000137.fits
2 WT10_409 2 2 left_wfscimage000139.fits
3 ACT0400 1 1 left_wfscimage000144.fits
4 WT10_308 1 1 left_wfscimage000147.fits
5 ACT0208 2 2 left_wfscimage000148.fits
7 WT10_246 1 1 left_wfscimage000156.fits
8 ACT0123 1 1 left_wfscimage000160.fits
9 ACT0161 1 1 left_wfscimage000163.fits
11 ACT0218 8 8 left_wfscimage000168.fits
12 WT10_320 4 4 left_wfscimage000172.fits
13 ACT0333 13 13 left_wfscimage000176.fits
14 WT10_288 1 1 left_wfscimage000182.fits
15 WT10_271 3 3 left_wfscimage000183.fits
may be bad 16 WT10_316 2 2 left_wfscimage000186.fits
may be bad 17 ACT0214 3 3 left_wfscimage000189.fits
18 ACT0110 4 4 left_wfscimage000193.fits
19 ACT0159 2 2 left_wfscimage000197.fits
bad 20 WT10_299 1 1 left_wfscimage000199.fits
22 WT10_261 1 1 left_wfscimage000205.fits
23 WT10_295 2 2 left_wfscimage000216.fits
24 WT10_402 2 2 left_wfscimage000219.fits
25 WT10_402 2 2 left_wfscimage000220.fits
26 WT10_410 20 20 left_wfscimage000225.fits
27 WT10_407 3 3 left_wfscimage000228.fits
28 ACT0331 7 7 left_wfscimage000229.fits
28 WT10_331 1 1 left_wfscimage000231.fits
29 WT10_372 2 2 left_wfscimage000233.fits
30 WT10_392 4 4 left_wfscimage000234.fits
31 WT10_390 5 5 left_wfscimage000237.fits
32 ACT0407 21 21 left_wfscimage000239.fits
33 ACT0368 3 3 left_wfscimage000241.fits
34 WT10_393 31 31 left_wfscimage000246.fits
35 WT10_366 11 11 left_wfscimage000250.fits
64 WT10_269 7 7 left_wfscimage000253.fits
65 WT10_269 7 7 left_wfscimage000254.fits

Astigmatism data below is also useful for pointing analysis.

DJT's fit:
LBT left Pointing Log, 2013 Jan 24
T   31   6.1787    0.000   0.0000
  IA       -410.4070     3.47466
  IE        -49.0790     5.53660
  AW         -2.1472     1.34529
  AN        +27.6457     1.30813
  TF       -102.9501    18.23148
  TX        +44.7273     7.47059
  NPAE      +57.7482     3.42760
 =CA         +0.0000

SX AdSec Astigmatism LUT Hysteresis Data

Pointing data above is also useful for astigmatism, but the SX M2 LUT was still on.

60 Elevation

05:53 Use 60 elevation as our reference

06:01 Turn off AdSec LUT and set to z6 to 0.0

Time Star Elevation wfscimage Z6
06:01 AO249 80 left_wfscimage000274.fits 568
06:05 AO296 60 left_wfscimage000278.fits -3973
06:09 AO315 71 left_wfscimage000281.fits -715
06:13 AO296 62 left_wfscimage000284.fits -3673
06:15 AO375 49 left_wfscimage000288.fits -5739
06:19 AO296 63 left_wfscimage000292.fits -1323
06:22 AO357 38 left_wfscimage000297.fits -7342
06:27 AO296 65 left_wfscimage000304.fits -547
06:38 AO344 31 left_wfscimage000311.fits -9178
06:43 AO296 68 left_wfscimage000317.fits -212

40 Elevation

Time Star Elevation wfscimage Z6
06:50 AO471 39 left_wfscimage000326.fits -7526
06:59 AO249 82 left_wfscimage000353.fits +376
07:05 AO471 42 left_wfscimage000367.fits -7021
07:11 AO314 67 left_wfscimage000373.fits -576
07:16 AO472 39 left_wfscimage000378.fits -6735
07:21 AO379 50 left_wfscimage000382.fits -3476
07:25 AO472 40 left_wfscimage000386.fits -6209
07:30 AO474 30 left_wfscimage000391.fits -9414
07:34 AO472 42 left_wfscimage000397.fits -4090

Z6 data in the above table was extracted from tcslog by /home/lbcobs/supportscripts/ObserverSupport/astig.py -b 4 -s SX
which uses the command:
cat /lbt/log/current.log | egrep -i "setEquatorialTarget - SXSep|PSFL: ACTOPT: Primary Zernikes" | grep setEquatorialTarget -B 1 | grep "Primary Zernikes" 

Results are saved in /tmp/astig.sx.20130124telescope.tmp (obs1)

LFBG Field Data at EL=55 on BS9134

Copied the Ashby3 collimation tables from MODS1 to LUCI1. LUCI1 previously used "20121218" model for M2 and "20120927" model for M1.
SXPMMODSCollimation.Ashby3.dat
SXSMMODSCollimation.Ashby3.dat

Clouds are moving in, but got some field aberration data at LFBG before we had to close.

GStar wfsc #
0 403
18 404-406
0 407
16 408-410
GStar wfsc #
0 413
18 414-416
0 417
16 418-420
0 421
17 422-424
0 425
9 426-428
0 429

Closed

09:30 Closed by heavy clouds.

-- DougMiller - 24 Jan 2013

This topic: Commissioning > Main > WebHome > Com20130124
Topic revision: 05 Feb 2013, JohnHill
This site is powered by FoswikiCopyright © by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding Foswiki? Send feedback