AuxTel Image out of focus

Overview

This procedure should be used when images appear out of focus due to a WEP failure or other related issues. Users will notice images ranging from slightly out of focus to large donut appearances when ATHexapod offsets are not correctly applied.

Error diagnosis

• The focus script auxtel/latiss_wep_align.py might fail, leaving the system out of focus.

• These out of focus images might vary from slightly out of focus image when the LATISS WEP align script took the system out of focus, to complete out-of-focus images that can appear as large donuts when ATHexapod offsets are left in intra or extra focus positions due to a script failure.

Slightly out-of-focus image.

Extreme out-of-focus image.

Procedure Steps

1. Pause LOVE ATQueue.

1. Clear all ATAOS offsets for the x, y, and z axes. Load and run the standard script auxtel/offset_ataos.py moving the script up in the queue with the following configuration:

   auxtel/offset_ataos.py

   reset_offsets: all
   

2. Run the auxtel/latiss_wep_align.py external script with the configuration below to find a new target in the area of the sky of your choice. Replace az and el.

   auxtel/latiss_wep_align.py

   find_target:
      az: 135
      el: 40
      mag_limit: 8.0
   

3. Keep playing the rest of the scripts in the queue, ensuring the system is now in focus.

4. Complete the procedure by verifying the system is in focus.

Post-Condition

• System is back in focus.

Contingency

If the procedure was not successful, report the issue immediately in the #summit-auxtel channel.

1. If step 2 doesn’t work and you see a large number in the ATAOS offsets values at the AuxTel Monitor LOVE dashboard, it is because offsets had been wrongly accumulated.

   Restart ATAOS: Cycle ATAOS CSC to STANDBY and back to ENABLED state.

2. If ATAOS was restarted, corrections need to be re-enabled.

   Use run_command.py with the following configuration to re-enable ATAOS corrections.

   run_command.py to enable AOS corrections

   component: ATAOS
   cmd: enableCorrection
   parameters:
      hexapod: true
      m1: true
      atspectrograph: true