General Principles

• DO NOT use control-c to stop a script, this can leave the instrument in an unsafe state. Use kpfconfig.SCRIPTSTOP to request a stop (also available as a button in the KPF OB GUI).

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Setting SCRIPTSTOP to “Yes” will request that the running script terminate in an orderly fashion. This may take several minutes depending on when the running script reaches a sensible breakpoint. It is important to use SCRIPTSTOP to halt a script (instead of hitting ctrl-c) because cleanup actions will be performed after a SCRIPTSTOP (e.g. turning off laps to preserve their lifetime).

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The agitator can be reenabled by simply setting the keyword to “Yes”. This should only be done by WMKO staff and should only be done if the agitator is fully functional. A broken or misbehaving agitator mechanism presents a significant danger to the science fibers.

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The cal source has likely been disabled for a reason. Reenabling it should only be done by WMKO staff with knowledge of why it was disabled in the first place.

SlewCal or Simultaneous Calibration Source is Wrong

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These two sources are set from the same place and are always kept to the same value using the kpfconfig.SIMULCALSOURCE keyword.

Solution

This value should only be changed by WMKO staff. The choice of calibration source is influenced by our desire to maintain the lifetime of the various lamps and calibration sources and by the need for warmup times on certain sources. This is not something the user should adjust, contact a WMKO Staff Astronomer if you feel it is set incorrectly.

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The detector has likely been disabled for a reason. Reenabling it should only be done by WMKO staff with knowledge of why it was disabled in the first place.

Detector Fails to Trigger Without Error

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The correct values are checked in testall.py, so you can always run that to verify values are ok.

L0 Generation

Deprecated L0 files

L0 files are generated by gathering the “sub-FITS” files from the Green, Red, CaHK, EM, and guide cameras, processing some of them (EM and guide camera), adding telemetry drawn from KTL keywords and the sub-FITS headers to the new L0 FITS header, and writing the L0 file. This process happens automatically by using keywords to notify a dispatcher that a recent exposure is ready for L0 file creation. If this dispatcher is stopped or dies, it can be restarted with the command kpf restart assemble. If L0 files need to be generated manually (e.g., because the dispatcher stopped or L0 files need to be regenerated), it can be done with the command

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