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Processing of the June 2025 NIKA2 Re-Commissioning
PIIC reduction of the 20250612s43 beam-map
SB, 2025/06/12 @18:20 LT: The beam map is scan 20250612s43. Results of a quick analysis of the beam map: the quality of the beam map (sky, telescope, focus, etc.) is unfortunately not good enough for making new (preliminary) Ar1 and Ar3 DAFs. Below you see the classic FOV beam-map figure. Ar3 is much worse than Ar1 likely because the best focus difference that affects it. Nevertheless, also Ar1 is unusable.
On the bright side: the central KID (Ar2, KC016, PIIC id 363) is definitely back! Yay!
PIIC reduction of the 20250616-18 beam-maps
During the second half of run 73, six beam maps have been taken, namely:
| 20250616s179 | focus Ar2-1 | 3C273 | | 20250616s181 | focus Ar3 | 3C273 | | 20250617s49 | focus Ar2-1 | 2251+158 | | 20250617s51 | focus Ar3 | 2251+158 | | 20250618s83 | focus Ar2-1 | 2251+158 | | 20250618s90 | focus Ar3 | 2251+158 |
SB reduces them of 2025/06/24.
Impressions:
- overall the conditions were better than during the first half of run 73 (2025/06/12), but still sub-optimal
- s51 does not seem very well focused on Ar3. As a matter of fact it is pretty decent also for Ar1.
- s181 and s179 seem to have a similar focus (both are extremely bad for Ar3)
- Ar3 seems to have problems. I don;t know if it's a problem of focus or a problem of boxes noise. The feeling is that its behavious is now different in run 73, with respect to run 72, in terms of either focus, boxes noise, or bpth. Many Ar3 KIDs are lost even in the Ar3 best beam map (20250617s51)
- best beam maps of run 73: Ar2 20250618s83; Ar1 20250618s83; Ar3 20250617s51.