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