UT 20230904: Restart Night#3



Night Info

For the night of: Sun, 2023 Sep 3 ---> Mon, 2023 Sep 4
Local midnight = 2023 Sep 4,  7 hr UT, or JD 2460191.792
Local Mean Sidereal Time at midnight =  22 33 02.2

Sunset ( 1000 m horizon):   18 47 MST; Sunrise:   5 51 MST
Evening twilight:  20 06 MST;  LMST at evening twilight:  18 39
Morning twilight:   4 31 MST;  LMST at morning twilight:   3 05
12-degr twilight: 19 36 MST -->  5 02 MST; night center:   0 19 MST

Moonrise:  21 03 MST   
Moon at civil midnight: illuminated fraction 0.763
2.6 days before last quarter, RA and dec:   2 28 52, +15 20.5

Weather:


Staff

  • OSA: Josh Williams
  • ISA/SO: Jenny Power
  • ECD Coordinator: Jenny Power

Night Plan

On-Sky Plan

On-sky presets (Track, Acquire, Active)
    • LBC Track
    • MODS Active, Acquire, Track

LBC Checkout
  1. Twilight flats: Try to obtain flats through all 6 B and 8 R filters during the course of restart
  2. DONE Check LBCR hub positions.: Any conditions
    1. Use a copointing script to slew to a field at ~70-75 deg elevation.
    2. Use /lbt/lbto/lbc/Calib_OBs/FOCUS/ Choose either RB_rVfastextra4.ob which will use all 4 chips or RB_rVlowextra.ob - uses the same portion of chip 2 as dofpia
    3. Measure diameters of extra-focal images for B and R. Compare. Ideal diameter is 61.5 pix, though temperature will affect this, so compare the red with the blue pupils. The blue winter/spring/summer hub settings are fine. What focus offset (call it delZ_R) is needed to make red match blue? Scaling factors are: https://scienceops.lbto.org/lbc/observing-with-lbc/troubleshooting/#TOC-collimation-problems: Increasing z4 or Z will decrease the diameter of the pupil. delta_Z[mm]/delta_d[pix] = 1/75.32 = 0.013 mm/pix
    4. Adjust PSF -> Z global offset by delZ_R
    5. Repeat OB
    6. Let the ISp know that this offset is needed to LBCR summer/spring/winter positions.
  3. DONE Pointing and Collimation: Any Conditions
    1. Collimate Use the same copointing script to collimate
    2. Correct pointing/copointing with lbcrangebal
  4. DONE Rotator Center: Any Conditions Obtain images to measure the rotator center on chip 2. Chip2 is the only one to read out.
    1. Send a track preset at PA=0
    2. Send no preset (dec=-90) at PA=180,
    3. Send no preset at PA=90
    4. Send no preset at PA=270
  5. Focal Plane Tilt: Good seeing ideally Check: focal plane tilt with superfoc sequences at PA=0, PA=180, PA=0 /lbt/lbto/lbc/Calib_OBs/FOCUS/(OBNAME)
  6. DONE TMS testing: Run TMS with the following This will check:
    1. TMS operation and also
    2. also the new FPIA/TMS interaction.
    3. Standard Fields: If photometric, observe at least one photometric standard star field from each set (also tests dithering, but not guiding):
      1. Clem & Landolt
        • LBCB: UBV
        • LBCR: VRI
      2. sdssY
        • LBCB:gr (+Us as filler)
        • LBCR: rizY
    4. Observe with guiding and dithering: There are a few science-like OBs in the checkout OT
      1. LittleDumbell (20h22d)
      2. DONE BlueSnowball (23h42d)
  7. Pointing Model:
    1. plain LBC pointing model? or
    2. TMS pointing model?
MODS Alignment
  1. AGw5/6 Alignment (MODS1/2)
    • Verify SH spots
  2. Rotator Centers on MODS detectors
    • Scripts and readme located in: /home/lbto/Service_Observing/Restart_2023/MODS/RotCen
    • ~30 minutes. 10 for the initial slew+collimation and then about 5 min per PA (~3 for the script, but add time for rotator slews)
    • Run the sequence:
      • active0 to collimate, then
      • track0
      • track180
      • track90
      • track270
  3. Field Aberration LDG, RDG: Requires Seeing <1.2"

Closed Dome Plan

  1. SX Flat optimization with LBTI WFS
    1. Configure the telescope for LBTI (can not be done in parallel to moving telescope or swingarm tasks)
    2. Requires stow mins in, on oil, dark chamber, argos source deployed
    3. Acquire the argos source with the LBTI WFS, close the loop. Save a new flat. Rinse and repeat
  2. MODS reference Calibrations: Contingent on repairs to MODS1 quadcell and completion of tasks 1 & 2
    • Telescope at zenith, lights off for all but the lamps. Take these as able, but try to get through the (1) BIases, (2) Comparison lamps (grating), (3) Slitless pixel flats and (4) Imaging flats and then the dual grating slit flats.
    1. Imaging Flats
      • DONE Blue Imaging (17min)
    2. Slit flats:
      • Dual (113 min, w/o 0.3")
        • DONE 0.6" - 20 min
        • DONE 0.8" - 19 min
        • DONE 1" - 19 min
        • DONE 1.2" - 19 min
        • 2.4" - 18 min
        • 5" - 18 min
        • 0.3" -
      • DONE Red (67, w/o 0.3")
        • DONE 0.6" - 12 min
        • DONE 0.8" - 12 min
        • DONE 1" - 12 min
        • DONE 1.2" - 12 min
        • DONE 2.4" - 12 min
        • DONE 5" - 7 min
        • 0.3"
      • Blue (81, w/o 0.3")
        • DONE 0.6" - 14 min
        • DONE 0.8" - 14 min
        • DONE 1" - 14 min
        • DONE 1.2" - 13 min
        • DONE 2.4" - 13 min
        • DONE 5" - 13 min
        • 0.3" - 15 min
    3. Comparison lamps (prism = prlamps)
      • 23 min total - good check on whether all the lamps are working.
        • dual - 8 min
        • red - 7 min
        • blue - 7 min


Night log

https://docs.google.com/document/d/1aHa7Z_v6wpj5ehwGWL17ZU0ovudwy3BjyudnOXcKgXM/edit?usp=sharing

-- JenniferPower - 03 Sep 2023
Topic revision: r6 - 04 Sep 2023, JenniferPower
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