Let 2-CCD (S3+FI) observations with less than 300 counts in the sequence go to -109 C

[jzuhone]

Description

This PR enables the checking of 2-CCD observations (S3+FI) with less than 300 counts in the sequence which are allowed to go to -109 C. It does so by expanding the definition of -109 C-capable observations (i.e., leaving open the possibility that S3-only observations would still occur).

On the web page for the focal plane model, expanded information about the "hot ACIS" observations is now reported, and the same observations are also marked with a different color on the thermal plots.

Example:

https://cxc.cfa.harvard.edu/acis/Thermal/tests/fptemp_mar2122/

This also fixes a bug I uncovered in the process of preparing this PR that relates to the counting of all of the obsids in the sequence.

Interface impacts

The web pages now have expanded human-readable information about hot ACIS observations.

Testing

Unit tests

• No unit tests
• Mac
• Linux
• Windows

Functional tests

Several loads were hand-checked to make sure that the correct observations were marked as -109 C-capable.

[jzuhone]

@taldcroft since this fixes a bug as well as implements the 2-CCD "hot ACIS" observations which MP is already using, I'd like to get this into the next skare3 release. ACIS Ops will review, merge, and tag very soon.

[jazan12]

Hi John,

I think it looks good. Because we only care about counts when there is no grating, I believe this is OK, but (as we discussed at the tag-up) I think the EST_CNT_RATE is only capturing the 0th order for grating observations, and not the 1st order. But this doesn't have bearing on the IDing etc so is a very minor thing.

-Jack

[Gregg140]

Looks good to me