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:
    guider_center02.jpg

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:
    guider_center04.jpg

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:
    guider_center06.jpg

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

Topic attachments
I Attachment Action Size DateSorted ascending Who Comment
guider_center02.jpgjpg guider_center02.jpg manage 22 K 22 Jan 2013 - 05:00 DougMiller right_guider000002.fits
guider_center04.jpgjpg guider_center04.jpg manage 21 K 22 Jan 2013 - 05:00 DougMiller right_guider000004.fits
guider_center06.jpgjpg guider_center06.jpg manage 21 K 22 Jan 2013 - 05:01 DougMiller right_guider000006.fits
This topic: Commissioning > Main > WebHome > Com20130122
Topic revision: 28 Jan 2013, JohnHill
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