Ready for Observing: 24 October 2010 UT

Observer: DMiller, SEsposito, MXompero, LBusoni, APuglisi, FQuiros
Telescope Operator: DHuerta (LBTO)
Telescope Support: MMidkiff (LBTO)
Instrument Support: TShih (LBTO)

Summary

Scattered clouds at the beginning of the night, but looking better. 105% humidity

Preparations

Details

UT AO Star B Mag El Max Guide Star
02-06 AO_20p40m06_0 6.6 76 12
  AO_20p40m06_1 6.49 73 8
  AO_22p40m07_1 7.92 78 6
  AO_22p40m07_0 7.89 79 18
  AO_22p40m08_2 8.9 78 8
  AO_22p40m08_1 8.6 79 6
  AO_22p40m09_2 9.13 78 16
  AO_22p40m09_1 9.49 80 8
  AO_22p40m10_0 10.49 79 17
  AO_22p40m10_1 10.44 77 15
  AO_20p20m13_0 13.5 83 18
  AO_22p20m11_0 11.2 80 5
04-08 AO_00p00m06_0 6.1 76 2
  AO_00p20m07_1 7.7 77 3
  AO_00p20m07_2 7.4 77 1
  AO_00p20m08_0 8.4 78 4
  AO_00p20m08_1 8.5 78 2
  AO_00p20m09_1 9.96 79 1
  AO_00p20m09_2 9.0 77 1
  AO_00p20m10_2 10.9 77 1
  AO_00p00m12_1 12.9 72 1
  AO_22p00m13_0 13.3 65 2
  AO_00p20m13_0 13.66 77 1
06-10 AO_02p40m06_1 6.8 74 5
  AO_04p40m06_1 6.9 80 1
  AO_02p40m07_0 7.0 82 4
  AO_02p40m07_2 7.8 75 14
  AO_04p40m08_0 8.9 78 8
  AO_04p40m08_2 8.5 78 12
  AO_04p40m09_2 9.1 72 2
  AO_04p40m09_1 9.4 74 8
  AO_02p00m10_0 10.9 76 1
  AO_02p00m10_2 10.6 73 3
  AO_02p00m12_0 12.3 74 3
  AO_02p00m13_1 13.7 67 3
  AO_02p00m13_2 13.8 71 2

04:30 Lost network connection to Steward. I can ping CCIT computers, but not in Steward. Vidhya has the same problem.

04:45 The skies are clear and the humidity is starting to go down (95%). Jeff and Tim the retroreflector.

05:10 The humidity is down to 70%. David is preparing all systems to open. Opened vent doors and turned on mirror ventilation.

05:51 Chamber doors are opened

06:06 iif_preset, M5_0050, gs=0, MODE=ACQUIRE, ROTMODE=PARALLACTIC (using IDL for presets)

06:10 No star visible. David tries a spiral search for a bit, but does not find anything.

06:15 David sent a preset from IRAF to M5_0094. Still no star. Stopped and started GCS. Sent acquire preset again

06;20 Send preset in TRACK mode to see if we can find a star on the IRTC. None

06:25 Initialize the secondary hexapod. Try preset in Acquire mode. No star

06:35 Send preset in TRACK mode. Spiral search with IRTC.

06:40 Set Secondary hexapod to June values 0.79, 2.1, 3.65, -325, 90, 0 from default global offsets of 2.5, -3.63, 1.77, -280, 280 0

06:55 David parks telescope at zenith and goes into the chamber.

07:10 David had pointed to a Stone Field, which the central stars are 10-14 mag in R

07:15 preset to M5_0094. Spiral search with IRTC. Nothing

07:30 Spiral search with GCS. Move Hexapod so out of focus. Find a glint.

07:50 Get the star centered. Hugh amount of coma. David moves the hexapod to try to remove coma. Not much progress. IE =-65 CA=20

08:00 preset to BS9101 gs=0 ACTIVE. @ 45 elevation (oops, meant higer) GCS collimate. Mostly astigmatism from the secondary. After 10 iterations collimated to 500 nm rms. Seeing is 1.2"

08:20 preset to AO_02p20m06_2 gs=3 ACTIVE. No star found.

08:22 preset in Acquire, Parallactic mode. Spiral search. Oops, was searching for gs=3

08:28 preset to AO_02p20m06_2 gs=0 ACQUIRE. Found and recentered.

08:35 preset to AO_02p20m06_2 gs=1 ACTIVE. Collimate to 300 nm. Central star too bright (4.7m) for AO operation.

08:45 preset AO AO_04p40m08_0 gs=8, ACTIVE, /YAXIS Collimate for 5 iterations to 300 nm rms

09:00 Hand over to AO People

09:00 They close the AO loop using the AOS GUI

IssueTrak # 2953

AO guys take a bunch of data.... Last night (20101024) at 11:34 I sent an ADATIVEACE preset, which failed because the guide star was not found when guiding tried to start. The acquisition image, acquire000011.fits, has the off-axis guide star very near the hotspot, but when the smaller guide box was displayed, no star was present.

About 20 minutes earlier we had preset in ADAPTIVEACE mode to a new star. It failed. I repeated the preset and again the guiding acquisition failed. The guide star was seen in the acquisition image, but not in the first guide image, and the preset failed. The star had a lot of aberration, so I preset in ACTIVE mode, on the off-axis star, and the guiding succeeded. We collimate to ~700 nm rms. I then sent another preset in ADAPTIVEACE mode (maybe image 09) which failed with no guide star, even though a acquisition had a collimated star, and put the red X on the star. We then preset in ACQUIRE mode and David put the star on the hotspot with changes to IE and CA. The next preset in ADAPTIVEACE mode had the star on the hotspot of the acquisition image, but guiding failed because there was no star in the first guide image. The next preset in ACTIVE mode was successful.

It looks to me that in ADAPTIVE mode guiding acquisition procedure is moving the guide star to somewhere unrelated to the hotspot, even when the star is on the hotspot in the acquisition image?

We were using AO5.

12:07 Closed the AO loop using IRC commands!! First time for this ON-SKY

12:10 Start for scratch to close AO loop with IRC command (ie not using PresetTelescope in ADAPTIVEACE mode but sending individual irc commands)

Preset in ADAPTIVE + presetao = 50 seconds All AO needed to close the loop = 2 min 15 seconds Total = 3 min 5 seconds from preset to closed AO loop

13:04 Closed

-- DougMiller - 23 Oct 2010

This topic: Commissioning > Main > WebHome > Com20101024
Topic revision: 27 Oct 2010, DougMiller
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