P60 ugri exposure times

[janvanroestel]

Feature Summary
Change the exposure time per filter for a ugri imaging request.
For some sources, the u-band exposure time is insufficient. There is an option to change the exposure time for all filters, but it would be good to increase the u-band exposure time by default given the lower efficiency.

Usage / behavior
There are two options:

1. allow the exposure time for each filter to be set individually
2. increase the u-band exposure time to 3(?) times the g-band exposure time by default.

Implementation details
There is already an option to change the exposure time. Option 1 would require adding more options to the SEDM request menu.
Option 2 is simply changing the default values. (requires communication with other users).

[scizen9]

This requires some updates to the SEDM watcher code (the processes that reads requests from fritz), but there is no reason this can't be done. I will update the default times for the u-band to be three times the other filters for now. Let me know how fritz will submit a request with per-filter exposure times and I will alter the code to parse it.

Currently, the photometry exposure times are based on the most recent magnitude of the target and cannot be specified. The IFU exposure time can be specified, but also defaults to being based on the most recent magnitude of the target. Jan's target appears to have no prior photometry on fritz. Not sure if this is a bug or not, but it causes the watcher to use the default exposure times which were previously all set to 90s. I have updated that to be 270s for u-band and 90s for the other filters.

Let me know how you want this implemented in fritz and we can accommodate it in the watcher script.

[janvanroestel]

There is of course the option of submitting multiple 'Mix-and-Match' requests (one for each filter) and specifying the exposure time there.

I guess if I'm the only one it might not be worth the effort to implement this feature, and just set the exposure times manually.