LATISS Daily Calibrations BIAS and DARK only

Overview

This procedure will acquire BIAS and DARK calibration images only. This page assumes the reader is familiar with the content explained in the Observatory section: Introduction to the combined calibrations generation procedure.

Warning

This procedure does not involves telescope motion with AuxTel. Announce that you are about to run the calibrations without telescope or dome movement on the #summit-announce and #summit-auxtel channels before you run the following steps. The Daytime calibrations can be taken at any time or under any conditions when convenient and they by default do not include the use of the Electrometer, Monochromator, or FiberSpectrograph CSCs, these can remain in STANDBY while running.

Post-Condition

  • Individual BIAS and DARK calibration images will be taken and verified using the cp_verify framework.

  • If generate_calibrations is True, a (daily) combined calibration image per detector will be certified in a butler CALIBRATION collection.

Procedure Steps

  1. Enable ATCS and LATISS using the standard scripts enable_atcs.py and enable_latiss.py with no configuration.

  2. Enable the OCPS:1 CSC which is used to run automatic verification pipelines on the data. The set_summary_state.py script will enable the OCPS:1 CSC.
    set_summary_state.py
    data:
  -
    - OCPS:1
    - ENABLED

  3. Enable the Scheduler:2 scheduler using the standard script auxtel/scheduler/enable.py.

  4. Run the script auxtel/make_latiss_calibrations.py on the ATQueue with the following configuration:
    auxtel/make_latiss_calibrations.py
      script_mode: BIAS_DARK

  5. The script takes the default number of BIAS (20) and DARK (22 with different exposure times 5, 15 and 30 seconds) calibration images. The process will take about 15 minutes to complete.

Once the script finishes, announce that the calibrations are complete on #summit-announce and #summit-auxtel channels. Use the standby_latiss.py standard script to leave LATISS in STANDBY state.

Contingency

In cases with not enough time available for calibrations, skip this procedure.

This procedure was last modified Oct 24, 2025.