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Daily Reports (2025/11/18-25, NIKA2 run 76, Cryo run 88)

Observers on-site: Tuan-Anh Duong, Fengwei Xu, Benedetta Kalemi, Sihan Jiao

Astronomer-of-Duty, Pool Manager: Ioannis Myserlis

Operators: Joaquín Santiago, Mario Cervera

Preparatory notes

Please, remember to use the focus value of Ar1 (roughly Ar2 + 0.65 mm, but use directly the focus Ar1 monitor if possible).

Please fill the Table with the Ar1,2,3 focus values as follows. At best, make one table per day.

• Focus sequences
  Scan nr	Target	Ar2	Ar1	Ar3	Polarized?	Notes

Similarly, if any beam maps are taken:

• Beam maps (99 sub-scans)
  Scan Nr	Target	Focus	Notes

November 18th, 2025, Tuesday

• Focus sequences
  Scan nr	Target	Ar2	Ar1	Ar3	Polarized?	Notes
  70 -74	MWC349	0.22	0.87	1.08	No	Custom script. Start at 1mm. good fitting for ar1, ar 2 and ar3
  75 -79	MWC349	0.10	0.72	1.00	No	Custom script. Start at 1mm. good fitting for ar1, ar 2 and ar3
  81 -85	2251+158	0.05	0.80	1.00	Yes	Custom script. Start at 1mm. good fitting for ar1, ar 2 and ar3

15:30-18:00 Ioannis : Maintenance finished on time and start directly with NIKA2 observations. ~ 1hr of NIKA2 observations training with new observers (and the ones that want to refresh their memory). Started with NIKA2 total power to check stability. Tuning looks good (12/5/21 bad kids for Ar1/2/3) and pointing plus focus look consistent and stable. Sky looks stable (~ 1.5 - 2 Jy/beam at 2mm) and we decide to change to NIKA2-Pol (8/4/39 bad kids on Ar1/2/3). Start of project 084-25. Pointing, focus and calib_1scan (20251118s88) on 3C454 (2251+158), which has similar elevation with selected target (IRAS23151). Tried to do 1 rep on IRAS23151 but fog came fast and light snow started as well, so we stopped until weather gets better.

18:00-00:00 Sihan : @ 19:10 the weather is better, have a try.

November 19th, 2025, Wednesday

00:00-06:00 Tuan-Anh :

06:00-12:00 Fengwei :