UT 20230910: Restart Night#9



Night Info

For the night of: Sat, 2023 Sep 9 ---> Sun, 2023 Sep 10
Local midnight = 2023 Sep 10,  7 hr UT, or JD 2460197.792
Local Mean Sidereal Time at midnight =  22 56 41.5

Sunset ( 1000 m horizon):   18 39 MST; Sunrise:   5 55 MST
Evening twilight:  19 58 MST;  LMST at evening twilight:  18 54
Morning twilight:   4 36 MST;  LMST at morning twilight:   3 34
12-degr twilight: 19 28 MST -->  5 06 MST; night center:   0 17 MST

Moonrise:   1 41 MST   
Moon at civil midnight: illuminated fraction 0.189
3.4 days after last quarter, RA and dec:   7 55 20, +25 29.7

Weather: Partly cloudy conditions predicted.


Staff

  • OSA: Steve Allanson
  • ISA/SO: Andrew Cardwell
  • ECD Coordinator: Jenny Power

Summary

Night Plan

On-Sky Plan

PR Opportunity

National Geographic photographer on site. Morning and Evening twilight may be used for PR pictures. Higher Priority than pending skyflats. Configure for a bent gregorian station (tertiary in the beam, adsec in the beam).

PEPSI
If Ilya requires (pending analysis) - Not needed
  1. 58 Aql, HR9087, HR 718

MODS
  1. MODS Sky flats
    • Completed 3Kx3K imaging flats in ugri
    • Pending 3Kx3K imaging flats z
  2. Science-like script
    • NGC6764 ugriz 4 quad dither (19hr, 50deg), Restart_2023/MODS_2023/MODS_2023_workspace/NGC6764_ugriz_4quad.txt, syncoffsets inserted
    • 2023RL (non sidereal) imaging.
  3. Photometric Standards
    • Available first half: Need to check nimgs in scripts (times based on scripts in Restart_2022).
      • M13: twilight - 5 UT
  4. Spectrophotometric Standards
    • BD+33 until 04:30UT, BD+28 until 10UT, Feige110 6-10UT, G191-B2B from 9:30UT to twilight. Try to get Feige110 and/or G191-B2B which means standards are 2nd half of night.
    • If Clear, 2-3 spectra/mode
      For 3 spectra/mode, this will take 1hr/star
    • If not clear, 1 spectrum/mode
      One spectrum/mode will take 36 min

LBC Checkout
  1. Twilight flats: Try to obtain flats through all 6 B and 8 R filters during the course of restart
    • Completed LBCB r LBCB r
  2. High and Low elevation test. Execute 2 fields, one at high elevation and one at low.
    1. Science Like OBs, loacated in directory Restart_2023/LBC_2023/Science-like_OBs
      1. Crescent Nebula (20hr +38) Sloan + Bessell
      2. PerseusA (3hr 41 deg) Sloan + Bessell
      3. Blue Snowball (23h +42d) Sloan + Bessell
      4. NGC7479 (23hr 12 deg)
      5. DONE 2021SZ4 (non sidereal tracking) - 120 sec exposures set up but adjust to 60 sec if sky too bright. Good from 1am onward. Take plenty of images for rotation.
    2. 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

Closed Dome Plan

  1. Completed. Take MODS cals in advance of OSURC run.


Night log

-- JenniferPower - 08 Sep 2023
Topic revision: r3 - 09 Sep 2023, JenniferPower
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