Telescope and Instrument Restart Plan for 7-15 September 2012 UT

Overview

The September 2012 Restart Campaign includes the following items listed here in priority order (copied verbatim from the web calendar). The order of implementation is approximately the same as the priority order except that some items have sky quality and seeing requirements.

  • Telescope HW re-start after shutdown 1N (John)
  • AGW#1 re-calibration @ LFBG 1N (John / Doug)
  • Pointing and Collimation update 2N
  • TCS verification 2012G 3x0.5N (SWG)
  • AO verification with 2012G 2x1hr (IQ)
  • Instrument science verification 3N (*) (SciOps)
  • LBTI science verification (0.5N) (Phil)
  • New ActO 2x0.5N (Doug)
  • Non-Sidereal (Michelle)

Telescope Bootstrap Restart On-Sky and Focal Station Check

PreRequisites Off-sky

Engineering Tests

All of these on-sky restart activities assume that each telescope sub-system and instrument has been tested individually to the extent possible by the engineers and technicians as that system has be re-assembled or re-deployed following any summer shutdown upgrades or maintenance activities.

Closed Dome Tests

All of these on-sky restart activities further assume that each telescope sub-system and instrument has been tested with TCS 2012F in closed-dome conditions to verify its aliveness and proper interaction with other instruments and sub-systems. These tests should include closed-dome authorizations and presets.

Steve's Scattered Tests (as things become available)

  • LDG rotator movable
  • HBS on
  • All TCS subsystems successfully started
    • PMCs appear to be unhappy, but TCSGUI shows green. VxWorks/power supplies off. FIXED
  • SX primary raised successfully
  • DX primary actuator 212 having problems, can't raise. FIXED
    • DX primary raised successfully, we disabled 212 then reenabled it without further issue.
  • DX VxWorks shows left side in red, both PMCs show DUMMY mirror. FIXED
    • restarting PMCs fixed the problem
  • a few bad DX primary thermocouples... Kevin says the cable was pulled when aluminization happened, just need to replace/test
    • upon further discussion, the cables pulled were the OVMS accelerometers. Not sure now what caused this.
    • Front: MTC08F, MTC10F, MTC11F; Back: MTC09B, MTC10B, MTC11B (these were not previously disabled by default)
  • No write access to /scratch on obs1 as user telescope FIXED
    • Stephen Hooper fixed the permissions issues
  • John put secondaries and tertiaries in simulation mode in OSS, they are not powered at the moment, covers on them.
    • This was to allow authorization of different instruments, future presets etc.
  • SXM3 successfully initialized
  • DXM3 successfully initialized
  • Dave Ashby successfully balanced the telescope
  • EL drive works
  • Thin shell client in aux control room unable to log into obs1, presumably since centOS update. FIXED
    • Stephen Hooper corrected the problem
  • AGW1 @ LFBG tested by Joe/Torsten.
  • AGW2 @ RFBG tested?
  • Weather/ENV machine IPs were changed to 192.168.18.40/192.168.18.41, vnc scripts changed accordingly.
  • Basic system fonts on the obs machines (which existed prior to centOS update) seem to be missing. For example, Helvetica size 12
    • Stephen Hooper on the case.
    • I found solution online, I need Stephen to yum install some 75dpi font packages.
  • Webcam URLs changed, I found and corrected bookmarks
  • DIMM serial connection error to mount. See IT#4115. Notified Kellee.
  • DX Mirror Cell door missing, as well as a port hole over at catwalk level.
  • Mirror ventilation untested.
  • rotators untested.
  • swingarm motion untested.
  • snow melt ventilation untested.
  • shutter/vent doors untested.
  • glycol leak, level 5, room between aux control and chamber. See IT#4183.
    • cracked brass fitting, leading into glycol return line. Bucket/pig in place for time being.

(above tests were Aug 29 - Sep 2, 2012 MST)

Remaining Closed Dome Tests

  • Dark Dome Light Survey
  • Dark Dome Night-Vision Survey

Telescope Bootstrap Restart On-Sky

These restart observations at the individual focal stations have minimal sky requirements. They can handle poor seeing and a limited amount of clouds. They will be done in the following order unless instrument or personnel availability suggest a change.

Twilight Startup

In addition to the normal opening procedures.....

  • Watch and Listen to Shutter Doors on opening
  • Watch and Listen to Vent Doors on opening
  • Watch and Listen to Telescope moving in elevation
  • Watch and Listen to Telescope and Enclosure moving in azimuth
  • Check Mirror Ventilation
  • Check Hydrostatic Bearing System
  • Check Chillers and Instrument Cooling System
  • Inspect Level 4 for leaks and other anomalies
  • Inspect Level 5 and telescope for leaks and other anomalies

LBC Initial Observation On-Sky

Basic Pointing and Collimation

  • Power-on LBC
  • Authorize LBC on BOTH sides
  • Connect to TCS
  • Take sky flats if time permits
    • Blue_SkyFlatScalings.ob and Red_SkyFlatScalings.ob in /home/LBTO/Calib_OBs/SKYFLAT_Scalings/ are good for obtaining a single flat in each of the LBC-R and LBC-B filters. These were designed to determine the exposure time scale factors needed for Mkskyflat.pl, and a more efficient ob which moves both B and R filter wheels can be made. See Flat_Fields for more details.
  • Send a BOTH TRACK preset to a pointing star
    • Verify that pointing is somewhere close (within 1 arcmin)
  • Run DOFPIA to collimate
    • Inspect Pupils
    • Verify collimation convergence (see also Issue 4009)

Guiding and Rotator

  • Play an OB with several ~3 minute exposures (subject to moon and sky conditions)
    • Verify guiding and field rotation at TCS and on science images and on tech images.
    • Verify Science and Technical images are appearing in the archive.
    • Check that Tech Chip focus corrections are being calculated and sent.

Dithered Observations

  • Play an OB with dithering
    • Verify telescope offsets

Initial Check of Focal Plane Image Quality

  • Send a BOTH TRACK preset to another target
  • Run DOFPIA to collimate
  • Take a full-frame Extrafocal/Intrafocal Image Pair (seeing should be better than 1.5 arsec)
    • Inspect the pupils
    • Analyze these images off-line
  • Take a full-frame Superfoc sequence of images through focus (seeing should be better than 1.2 arcsec)
    • Inspect these images for gross tilt and focus problems
    • Analyze these images off-line

Optional Other Tests with LBC

  • Check the Co-Pointing and Range Balancing Script
    • Send a BOTH TRACK preset to a pointing star
    • Test the IRAF script lbcrangebal for LBC co-pointing and range-balancing (the actual co-pointing and collimation will be done later)
      • record the IE/CA needed for pointing and copointing

  • Test a small binocular leak rate (PCS) for LBC guiding. Try 1 mas/cycle = 20 mas/sec = 1200 mas/min

  • Disconnect from TCS
  • Power-off LBC (assuming no further use tonight)

Reconfigure Telescope for MODS1 @ LDG

MODS1 Iniitial Observation On-Sky

Initial Pointing and Collimation and Guiding

  • DONE Power-on MODS1 and its AGW
  • DONE Authorize MODS @ LDG
  • Take sky flats if time permits
  • DONE Send an ACQUIRE preset to a pointing star (see Issue 4134)
    • Verify Coma, or adjust if needed
    • Verify Pointing, or adjust if needed
  • DONE Send an ACTIVE preset to a on-axis collimation star
    • Verify proper acquisition sequence
    • Verify guiding
    • Verify Active Optics convergence
  • DONE Send an ACTIVE preset to an off-axis collimation star
    • Verify proper acquisition sequence
    • Verify Active Optics convergence
  • See log at 15 September 2012 Commissioning Log

Imaging Tests

  • Play an observing sequence with ~3 min exposures
    • Verify guiding and rotator performance
  • Play and observation with dithers
    • Verify dither positions

Spectroscopic Acquisition

  • Play and observation sequence with a spectroscopic acquistion

BREAKPOINT



BREAKPOINT: If the weather in September 2012 was to be incredibly bad, we must get at least to this point before the telescope can be released to do science with MODS1 and LBCs.

Optional Other Tests with MODS

  • Test the IRAF script binorb for Gregorian co-pointing and range-balancing (the actual co-pointing and collimation will be done later)

John is not finished editting below this line.

Reconfigure Telescope for IRTC @LFBG

Initial Observations with IRTC on-sky

IRTC and AGW1 Prerequisites

  • Day time commissioning of AGW1. Able to position AGw on-axis, wfs apert. coincident w/rotator center
  • AGW1 installed on telescope @ LFBG DONE
  • AzCam readout and bias levels configured and tested.
  • IRTC installed on telescope @ LFBG
  • M3 angle surveyed to the proper position
  • 2012F configured for AGW1 at this position

Initial Pointing and Collimation of LFBG with IRTC

  • Power on AGW1 and IRTC
  • Switch PCS to be Monocular Left-sided on IIFGUI.
  • Determine initial pointing model and collimation zero points
    • Reset AZ and EL encoders
    • Point to very bright source, e.g.:
      • Vega at 18 36 56.3364 +38 47 01.291
      • Pollux at 07 45 18.9503 +28 01 34.315
      • Regulus at 10 08 22.3107 +11 58 01.945
      • Arcturus at 14 15 39.6720 +19 10 56.677 (watch out for high proper motion)
      • Note: these 4 stars are now in the default catalog used by "pointto".
    • take an image with IRTC, or put IRTC into continuous readout mode
    • collimate (by eye) to correct focus and coma. [Andrew says move only M2 RX/RY for initial collimation.]
    • offset M2 X/Y to center star on detector
    • iterate the collimation adjustment
  • Update the pointing model
    • All the left (SX) focal stations are using the same pointing model, so we don't expect that any refinement of the pointing model will be required.

Initial Rotator Zeropoint with IRTC (open loop)

This is a sanity check to make sure we understand how AGW1 is mounted. We will use the traditional LUCI1 angle until it is remeasured in a couple weeks.

  • PCS/MCSPU: Check Position Angle and Rotator Motion with IRTC
    • It was hard to find asterisms, so we make the first cut by offsetting the telescope in known directions.
      • Preset in TRACK mode and center the star with IE/CA.
      • Offset the telescope and observe which way the star moves on IRTC
      • Be certain that you are sending your offsets in RADEC space and not DETXY space.
    • take IRTC images/cubes at several Position Angles
    • verify sign (parity) and zeropoint of the Position Angle for IRTC
    • Adjust LEFTZEROPOINT in PCSInstrument.conf to refine the Position Angles

Check M3 selector angle and tip-tilt

This is a new procedure not previously included in AGw checkout. We previously set the position from the laser tracker measurement.

The M3 position and the off-axis WFS alignment can be confirmed together by taking dome-flat images with the WFS camera at 4 position angles. The motion of the pupil (shadow) can be measured on these 4 images. The goal is to get the pupil wander as a function of position angle down to ~1/4 lenslet (4 pix) which is near the measurement noise of this technique. NOTE: The optics must be collimated during this measurement.

We (Doug/John) believe that this M3 alignment can be completed off-sky using the shadow of the secondary in wfs dome flats.

AGW1 Re-Calibration @ LFBG - Phase 1

This procedure has been adapted from the AGw Commissioning Plan in Com201110LBBGPlan .

AGw Guider Initial Calibration

Measure Rotator Center and establish the position of the optical axis

  • Determine rotator center in AGw space
    • Start up the AGW unit
    • Move AGw probe to nominal on axis position
    • Rotate the rotator (TO command) while taking a 70 sec exposure on the guide camera
    • Reposition AGw stage to align with rotator center (Jesper)
    • Repeat as needed to position rotator center on WFS aperture
  • Verify Rotator Center in IRTC space

Guiding Tests

  • Test closed loop guiding on-axis with GCS
    • Did the acquisition offset center the star in the guide box?
    • Is the guiding stable to perturbations, or does the star drift off in the wrong direction?
  • Sort out required parameter changes to make guiding stable.
  • Repeat the test and Guide off-axis to verify rotator rates and flip parameters

AGw WFS Camera Initial Calibration

Warning: AGW2 WFS camera is upside down compared to AGw3 and AGw4. This is because of clearance issues for the new flexible cables.

Find Hotspot on Guider to put star in center of WFSC pinhole

  • Send a GUIDE preset
  • Acquire star on WFSC
    • Option A
      • Place star on nominal "Center of WFSC Pin Hole" position (guiding is doing this)
      • If no S-H spots, then stop guiding and move guide probe small amounts in spiral pattern until spots found
      • Move guide probe in +x,-x, and +y,-y till spots are vignetted
    • Option B
      • Stop guiding
      • Move telescope around with IE/CA to search for spots
    • Note guider (x,y) image position of "Center of WFSC Pin Hole" and guide probe position of "Center of WFSC Pin Hole". Adjust the configuration file as needed.

Initial Check of Active Optics Corrections

  • Option A - GCS
    • Send preset to on-axis star in ACTIVE mode with sending corrections to PSF blocked
    • Calculate Zernike aberrations, send them manually with PSF starting with focus, then coma, then astigmatism, trefoil
    • Calibrate orientation of Z's, single mode, and adjust rotation of zernikes as needed.
  • Option B - IDL
  • Use Z9, Z10 to refine the Doug's angle offset
  • Verify that both IDL and GCS agree on the angles and flips.

Initial Closing of Active Optics Loop

  • Option A - GCS
    • Send preset to on-axis star in ACTIVE mode with sending corrections to PSF enabled
    • Calculate Zernike aberrations, send them manually with PSF starting with focus, then coma, then astigmatism, trefoil
  • Option B - IDL
  • Verify that both IDL and GCS agree on the convergence of the active wavefront solution.

Off-axis Active Optics

  • Verify the pupil positioning for off-axis stars is going in the right direction.
    • First on the Y-axis
    • Then over the whole field
  • Verify the range of pupil motion available on the WFS camera.
  • Verify active optics convergence at extreme field positions
  • Calculate Zernike aberrations, send them manually with PSF starting with focus, then coma, then astigmatism, trefoil
  • Verify that both IDL and GCS agree on the angles and flips.
  • Refine the pupil centering position. (Doug)

Focus the Guider relative to IRTC

This procedure needs good seeing. 0.6 arcsec or better in order to achieve sufficient precision.

  • This is the fast procedure which does NOT run Active Optics while stepping the secondary mirror.
    • Preset in ACTIVE mode
    • Allow a few minutes for active optics to collimate.
    • Record the nominal focus offset and the present off-axis position.
    • Press StopWFS button on GCSGUI
    • Run a script to take a series of image cubes while offsetting focus. (for IRTC: cl < home$focus_seq.cl )
  • Repeat the procedure several times until you've converged on a value for the focus offset.

  • The slow procedure would make steps in the nominal probe focus offsets and run active optics at each step. This turns out to be vulnerable to changes in the seeing over the tens of minutes that the procedure.

Check X-Y position of probe relative to focus position

This procedure does not care so much about the seeing.

See BGTechProcedures for the procedure.

Phase 2 involves re-measuring the transformation after LUCI has been remounted.

Binocular Pointing and Collimation Update for All Science Focal Stations

LBC Collimation, Co-Pointing and Pointing Models (doesn't care about seeing or clouds, but requires stable temperature conditions)

Here we are collecting data for collimation, co-pointing and pointing all at the same time.

For 28 stars over a range of elevations from 20 to 85 degrees, do the following: (select them in a grid with Pointingstars5)

  • Play an OB for the target field
  • Run DOFPIA to collimate
  • Run the IRAF script 'lbcrangebal' to range-balance and co-point while maintaining collimation.
  • Replay the OB to take another pair of images which record the mirror positions in the headers.

After the new pointing models (should be the same or nearly the same for both Red and Blue) are installed. Check them on ~5 stars.

LFBG/RFBG Collimation, Co-Pointing and Pointing Models

Note: The high priority activity is to collection collimation and pointing data for the Left Side (LFBG or LDG). However, if the scripts work, it takes the same amount of time to collect data for both sides simultaneously. Thus, our plan is to do both sides, but we have a fallback to the left side only if there are problems.

Collimation, Range Balancing and Co-Pointing

For 9 stars over a range of elevations from 30 to 85 degrees, do the following:

  • Send an ACTIVE preset for the target field
  • Wait for GCS to collimate
  • Run the IRAF script to range-balance and co-point
  • Record the mirror positions

Pointing Model Data

Pointing Model Confirmation

Field Aberration Check (requires good seeing)

If time permits, it would be useful to check field aberrations at LFBG and LDG.

TCS Software verification for Build 2012G

(participants John H and multiple members of the Software Group)

This will be the standard suite of on-sky observations to test the new TCS build. Adaptive Optics and Non-sidereal observations will be done at a later time (which could be later the same night).

These tests will use the old Active Optics algorithms in GCS, with the new Sextractor algorithms to be tested below.

  • Check Binocular Offsets for Issue 4142.

  • Check long duration (10 min) offsets out of the field for LUCI to verify that the star returns to the proper position. This needs a ~1 min cube of IRTC images before and after to get a decent centroid measurement.

Adaptive Optics verification for Build 2012G

We would still do a subset of this verfication with Build 2012F should Build 2012G be postponed for weather or technical reasons.

(Waiting for Doug and/or Juan Carlos to fill in some details here.)

Facility Instrument Science Verification for LBCs and MODS1

LBC Focal Plane Characterization (requires very good seeing, not worse than 0.9 arcsec)

(proposed participants are Olga, John H, Lee)

Following cryostat maintenance, and in response to a number of chronic image quality issues, we will carefully characterize the preset state of the LBC focal planes. In particular we will check:

  • global tip-tilt of the focal plane
  • on-axis astigmatism
  • V-band focus offset
  • field distribution of astigmatism
  • zero-point calibration of Z11 and Z22

The observations to do are:

  • Send a BOTH TRACK preset to a target near elevation 70 degrees

  • Run DOFPIA to collimate
  • Take 3 full-frame Extrafocal/Intrafocal Image Pairs
  • Run DOFPIA to collimate
  • Take 3 full-frame Extrafocal/Intrafocal Image Pairs

  • Run DOFPIA to collimate
  • Take a full-frame V-band Superfoc sequence (long version) of images through focus
  • Run DOFPIA to collimate
  • Take a full-frame V-band Superfoc sequence (long version) of images through focus
  • Run DOFPIA to collimate
  • Take a full-frame V-band Superfoc sequence (long version) of images through focus

  • Analyze these images off-line.

As far as the OBs needed -
 Those for full-frame extra/intra-focal pairs are
/home/LBTO/Calib_OBs/FOCUS/RB_rVexin4.ob (PA=0) and RB_rVexin4_pa#.ob
(PA=#). There are also ***inex4*** OBs to reduce overheads .

 Those for full-frame (long version) superfoc are RB_rV_superfoc7.ob (PA=0)
and RB_rV_superfoc7_pa#.ob (PA=#). These 7-pt superfoc sequences use
t=10sec and delta_foc = 0.06mm. There are versions for other filters, for
focus offset measurements.

LBC Filter Focus Offsets (requires very good seeing, not worse than 0.8 arcsec)

If seeing is very good, and if the focal plane tilt and V-band focus above are OK, then it is useful to repeat the filter focus offset measurement for all filters. For each pair of Red/Blue filters:

  • Send a BOTH TRACK preset to a target near elevation 70 degrees
  • Run DOFPIA to collimate
  • Take a full-frame Superfoc sequence (long version) of images through focus
  • Run DOFPIA to collimate
  • Take a full-frame Superfoc sequence (long version) of images through focus

LBC Photometric Calibration (requires photometric sky)

(asking Olga to fill in some details here)

LBC Sample Science Observations

LBTI Instrument Science Verification

(Waiting for Phil and Vidhya to fill in some details here.)

New Sextractor Active Optics Testing with GCS

This activity requires Build 2012G in order to have the correct new DD variables.

(Waiting for Doug to fill in some details here.)

Non-Sidereal Observations for Build 2012G with LBCs and MODS1

(proposed participants are Michelle and Michele)

(asking Michelle E to fill in some details here)

-- JohnHill - 24 Aug 2012
Topic revision: r19 - 15 Sep 2012, DougMiller
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