UT 20130122 Technical Observing with AGW2

Observer: DMiller (LBTO) JHill (Tucson)
Telescope Operator: GBechetti (LBTO)
Additional AO Support: DMiller (LBTO)
Telescope Support: JUrban (LBTO)
Instrument Support: ESolheid (LBTO)

Summary

We worked most of the night on AGW2 alignment tasks @ RFBG (originally scheduled for 24UT). Seeing was excellent (0.5-0.6 arcsec on guider) except for 9-10 UT.

We have verified RFBG active optics (95% was done last month on 20121229).
We have aligned the AGw2 probe to the rotator center (and fixed errors in the instructions).
We have adjusted the DX M3 tip-tilt to minimize the pupil wobble for "w". Doug's new routine to measure the pupil position makes this faster.
We've checked the angle of dice5 offsets relative to the IRTC columns, and it is OK until LUCI2 arrives for a precise measurement.
We've collected a preliminary set of transformation data for AGw2.
We've collected one set of RFBG field aberration data at EL=58, and started on a second set at EL=30. There were lots of struggles with saturated wfs images, but the data have little atmospheric noise.

Details

02:40 Found that I had left the WFS_high_factor to 0.8 in December, and had not completed the task of finding the correct signs for the high order zernikes (Z12-22). Set factor to 0.0 and now stable convergence. FWHM = 0.5"

Align AGW2 probe to rotator center

02:48 Rotator at 132.6. Send ACQUIRE preset with PA=-130. Rot angle = 3. Change IE by +5".

02:55 Stop guiding. Geno send RFBG rotator to 360. take 70 second image. Image /home/AOeng/data/20130122/wfsc/right_guider000001.fits and 002.fits

• measured pixel center at 155,102
• getxy -u2 0.132, 613.38
• getxy -u2 -o 16 --> 9.0, 1005593.0
• LUCI_IRTC_R.cfg guidecam_hotspot_x, y = 310, 239 in bin 2
• want 155, 120 (in binned x2 coordinates)
• right_guider000002.fits:
  

03:00 ACTIVE Preset to collimate

03:09 Stop guiding, Geno send rotator to 0, 90 second guider image

03:24 Stop guiding. Send rotator to 0. Timeout guider image.

• setxy -u 2 -x 0 -y 612.5
• getxy -u 2 -o 16 --> -18.0, 1001001.0
• measured center pixel = 149.2, 87.8
• right_guider000003.fits

03:34 JMH joins the party .....

04:05 collimate, ACQUIRE preset, Stop guiding. Send rotator to 0.

• setxy -u 2 -x -y 613.1
• getxy -u 2 -o 16 --> 9.0, 1001001.0
• measured center pixel = 151, 113
• right_guider000004.fits:
  

04:10 collimate, ACQUIRE preset, Stop guiding. Send rotator to 0.

• setxy -u 2 -x 0.132 -y 613.3
• getxy -u 2 -o 16 --> 9.0, 1010364.0
• measured center pixel = 154.1, 116.4
• right_guider000005.fits

04:15 probe x,y = 0.132, 614.4. collimate, ACQUIRE preset, Stop guiding. Send rotator to 0.

• setxy -u 2 -x 0.132 -y 613.4
• getxy -u 2 -o 16 --> 8.0, 1010884.0
• measured center pixel = 153.4, 118
• right_guider000006.fits:
  

Based on the encoder counts above, we think we want to shift encoder counts by dX=-26 and dY=-9883. The wiki instructions (BGTechProcedures) say to change homeoffset on each axis. We tried that.

04:43 reboot oacserver, but "network error" after that causes another round of restarting. We see that this didn't make any change in the Y (RAD) position. Scratch our heads for a while. Finally decided to change ooffset rather than homeoffset. Need to check later with Jesper to see if this was kosher.

05:25 John change parameters in oacontrol.conf (RAD ooffset moved from 419000 to 409117). That was way too much - probe runs into limit. Try dividing by 16.....

05:38 John change parameters in oacontrol.conf (RAD ooffset moved from initial 419000 to 418382 by subtracting 9883/16). Somewhat better.....

06:10 collimate, ACQUIRE preset, Stop guiding. Send rotator to 360.

• setxy -u 2 -x -0.03 -y 613.45 (preset)
• getxy -u 2 -o 16 --> -2.0, 1009183.0
• measured center pixel = 161.3, 112.9
• right_guider000009.fits

06:15 collimate, ACQUIRE preset, Stop guiding. Send rotator to 0.

• setxy -u 2 -x 0.0 -y 612.5
• getxy -u 2 -o 16 --> -2.0, 1004219.0
• measured center pixel = 155.0, 98.4
• right_guider000010.fits

06:25 That shift was only 1/3 what we needed, so John changes oacontrol.conf to have 2x more change in Y direction (RAD homeoffset=417147)

06:41 collimate, ACQUIRE preset, Stop guiding. Send rotator to 360.

• setxy -u 2 -x -0.132 -y 613.5 (preset)
• getxy -u 2 -o 16 --> 8.0, 1015056.0
• measured center pixel = 161.2, 131.7
• right_guider0000011.fits

06:45 collimate, ACQUIRE preset, Stop guiding. Send rotator to 0.

• setxy -u 2 -x 0.0 -y 612.5
• getxy -u 2 -o 16 --> -2.0, 1010637.0
• measured center pixel = 158.9, 118
• right_guider000012.fits

07:00 John changed oacontrol.conf for AGW2
X_0=0.000, Y_0=612.500, x_0=x_guide=310.0, y_0=y_guide=239.0
ROT homeoffset=-33876 (net decrease 20), ROT lim_f=-13164, lim_n=13216 (net increase 20)
RAD ooffset=417147 (net decrease 1853), RAD lim_f=1052353, lim_n=1853 (net increase 1853)

07:14 collimate, ACQUIRE preset, Stop guiding. Send rotator to 360.

• -x -0.029 -y 612.8 (preset)
• setxy -u 2 -x -0.0 -y 612.5
• getxy -u 2 -o 16 --> -1.0, 1010637.0
• measured center pixel = 156.1, 117.64
• right_guider0000013.fits

Check AGW2 Pupil Wobble wrt/ little w

07:19 preset to new target

Adjusting the DX M3 Tip-Tilt Global Offsets, and using Doug's routine "pupil_outer_fit" to measure the pupil center.

08:15 Tip=+300 Tilt=0

08:27 Tip=+300 Tilt=300

08:32 Tip=+300 Tilt=-300

08:40 Tip=+450 Tilt=-300 (IE=-21 CA=-157)

08:54 Tip=+450 Tilt=-150

09:02 Tip=+600 Tilt=-150

09:05 Tip=+300 Tilt=-150 AbsTip=-450 AbsTilt=+350 Select=-26.042

09:11 Tip=+200 Tilt=-150 AbsTip=-550 AbsTilt=+350 Adopted this number for "w". Updated DXM3IRTCFCollimation.dat.

Verify Position Angle Alignment on IRTC

Dice5 measurements on IRTC. The following table is composed of eyeball centroids of the cubes measured on the fly by JMH. Beware that the target star has a companion.

Image	X	Y
095445	159	135
095543	256	232
095715	62	35
095807	251	31
095904	59	231

AGW2 Transformation Data on Stone I

11:xx

GStar	PCS_X	PCS_Y	AGW_X	AGW_Y	Rot Angle	Pos Angle	Image File	Header File
4	-24.676	29.636	-24.448	581.867	-102.402	-120.000	irtc.20130122.00025_cube.fits	irtc.20130122.111116.fits
GStar	PCS_X	PCS_Y	AGW_X	AGW_Y	Rot Angle	Pos Angle	Image File	Header File
15	45.910	136.053	48.089	476.427	-105.171	-120.000	irtc.20130122.00027_cube.fits	irtc.20130122.111855.fits
13	120.895	34.925	121.458	579.134	-105.608	-120.000	irtc.20130122.00028_cube.fits	irtc.20130122.111952.fits
6	-65.602	42.720	-65.200	568.036	-106.565	-120.000	irtc.20130122.00029_cube.fits	irtc.20130122.112103.fits
16	-97.000	112.509	-95.434	497.520	-106.998	-120.000	irtc.20130122.00030_cube.fits	irtc.20130122.112331.fits
GStar	PCS_X	PCS_Y	AGW_X	AGW_Y	Rot Angle	Pos Angle	Image File	Header File
5	39.822	4.070	39.706	608.632	-108.455	-120.000	irtc.20130122.00032_cube.fits	irtc.20130122.112717.fits
11	62.292	101.577	63.894	511.280	-108.896	-120.000	irtc.20130122.00033_cube.fits	irtc.20130122.112825.fits
4	-36.650	13.019	-36.715	598.318	-79.392	-90.000	irtc.20130122.00034_cube.fits	irtc.20130122.112943.fits
GStar	PCS_X	PCS_Y	AGW_X	AGW_Y	Rot Angle	Pos Angle	Image File	Header File
15	-28.727	140.478	-26.596	470.673	-80.611	-90.000	irtc.20130122.00036_cube.fits	irtc.20130122.113305.fits
13	86.774	90.391	88.221	522.929	-81.043	-90.000	irtc.20130122.00037_cube.fits	irtc.20130122.113355.fits
16	-140.720	48.636	-140.330	560.799	-81.777	-90.000	irtc.20130122.00038_cube.fits	irtc.20130122.113504.fits
GStar	PCS_X	PCS_Y	AGW_X	AGW_Y	Rot Angle	Pos Angle	Image File	Header File
5	31.992	23.136	32.198	589.380	-83.243	-90.000	irtc.20130122.00039_cube.fits	irtc.20130122.113929.fits
11	2.698	118.814	4.502	492.945	-83.686	-90.000	irtc.20130122.00040_cube.fits	irtc.20130122.114036.fits
10	112.507	31.423	112.980	582.500	-84.134	-90.000	irtc.20130122.00041_cube.fits	irtc.20130122.114143.fits
GStar	PCS_X	PCS_Y	AGW_X	AGW_Y	Rot Angle	Pos Angle	Image File	Header File
15	-120.254	78.503	-119.327	531.210	-40.485	-45.000	irtc.20130122.00043_cube.fits	irtc.20130122.114520.fits
11	-82.721	85.412	-81.613	524.936	-40.903	-45.000	irtc.20130122.00044_cube.fits	irtc.20130122.114610.fits
13	-3.165	124.757	-1.260	486.884	-41.331	-45.000	irtc.20130122.00045_cube.fits	irtc.20130122.114714.fits
10	56.721	101.262	58.313	511.498	-41.779	-45.000	irtc.20130122.00046_cube.fits	irtc.20130122.114821.fits
14	130.807	32.922	131.387	581.311	-42.248	-45.000	irtc.20130122.00047_cube.fits	irtc.20130122.114932.fits
9	101.014	46.895	101.750	566.783	-42.693	-45.000	irtc.20130122.00048_cube.fits	irtc.20130122.115039.fits
3	29.302	15.060	29.364	597.430	-43.114	-45.000	irtc.20130122.00049_cube.fits	irtc.20130122.115143.fits

11:50 EL=58:09 (meridian) on M1 Z5=-152 Z6=-4134, on M2 Z6=+1.5 microns (are signs reversed?)

Field Aberration Data on Stone I at EL=58 deg

field_1/

12:00

12:40 changed wfs exposure time to 25000, but didn't restart GCS (ok). Is failing to find info file because of wfs saturation? That helped, but wasn't enough. Stars really are saturated in this good seeing.

GStar	wfsc #
0	636
GStar	wfsc #
0	639
GStar	wfsc #
0	642
13	643-645
GStar	wfsc #
0	648
8	649-651
GStar	wfsc #
0	654
14	655-657
GStar	wfsc #
0	661-662
15	663-665
GStar	wfsc #
0	670
15	671-673
GStar	wfsc #
0	676-677
16	678-680
0	681
10	682-684

12:50 Doug finally goes to bed after his "1/3 night" of observing.

Field Aberration Data on Stone G at EL=30 deg

field_2/

12:53 field_collect, start=1, limit=300 (Stone_G_field.list)

13:12 changed wfs exposure time to 20000, but didn't restart GCS (ok). The "saturation" preferentially recurs when we return on-axis. Why is that different than the initial collimation?

Seeing on guider is 0.7 arcsec FWHM at EL=27.5.

13:17 EL=26:25 on M1 Z5=-240 Z6=-10358

13:25 Shells RIP together as we go below EL=25 deg

GStar	wfsc #
0	689-692
10	693-695
GStar	wfsc #
0	698
10	699-701
GStar	wfsc #
0	705-706
11	707-709
GStar	wfsc #
0	712-713
8	714-716
GStar	wfsc #
0	719
12	720-722
GStar	wfsc #
0	726
13	727-729
GStar	wfsc #

Close

13:27 Close for impending dawn.

13:36 Put wfs exposure time back to 30000 in LUCI_IRTC_L.cfg.

-- DougMiller - 22 Jan 2013