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| 19 - 1 LT, Jean-François: | 19 - 1 LT, Jean-François: Now opacity around 0.35 and statble with p2p atmo fluctuations less than +/- 2Jy but 3 spikes on the taumeter during the session although sky fairly clear. Move to NIKA2 and project 093-26 and did 9 targets (cal_1scan). Then Observe secondary calibrator MWC349. Then Miren switch to polarimetry with HWP for project 085-25 : source G094.6028 with calibration scan on 3C454 before and after, we add a calibration scan on Uranus that is now above 40deg. Focus did not change significantly during the session (1.04-1.13). Pointing offsets are large (15") but consistent thru the run. |
Daily Reports (2026/10/20-27, NIKA2 run 81, Cryo run 93)
Observers on-site: Philippe André, Samuel Crowe, Jean-François Lestrade, Kaiyi Du
AoD: Miren
Operators: Sergio, Mario
Important
Focus offsets shall be measured on Ar1
Pointing offsets shall be measured on Ar2
Pool-Account usage: Accounting of observing times
Calibration observations like pointing, focus, and calib_1scan (the latter in case of NIKA2-Pol only, aimed at characterizing the instrumental polarization) which are conducted before and during project observations are part of the project time. Note that all proposals include such overheads in the time and sensitivity estimates. This holds for total power and polarimetry observations.
Other calibration observations which are important for all projects like beam maps, skydips, or calib_1scan for absolute flux calibration may be accounted under the pool account (nikaX-YY, where X = s,w and YY = year).
- When conditions are unstable and it is unclear whether project observations make sense at all, calibrations may be accounted to the pool account.
Book-keeping of important scans
We ask you to please keep track of focus sequences (as much as possible) and beam maps (always). Thanks.
Focus sequences
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
20261020s 44-48
1830-211
1.35
1.04
1.02
no
starting at 1mm
20261020s 74-78
K3-50A
1.40
1.13
1.13
no
scatter A2
20261020s 101-105
Uranus
1.51
1.03
1.03
yes
20261021s 9-13
3C454
1.64
1.14
1.17
yes
20261021s 28-32
Uranus
1.48
1.17
1.2
yes
20261021s 59-63
0316+413
bad
1.05
1.03
no
started 1.14mm
20261021s 77-81
1226+023
bad
bad
bad
no
started 1.05 mm; realized we were very far out of focus
20261021s 82-86
1226+023
0.7
0.51
0.51
no
started 0.5 mm
Beam maps
Similarly, if any beam maps (total power) are taken:
Beam maps (99 sub-scans)
Scan Nr
Target
Focus
Notes
Similarly, if any beam maps (polar) are taken:
Beam maps (95 sub-scans)
Scan Nr
Target
Focus
Notes
October 20th, 2026, Tuesday
All observers arrive at the telescope.
16h20 - 19 LT, Miren & Kaiyi:
- 16h20 LT: end of maintenance. Very cloudy and opacity around 0.44, doing system check with EMIR.
- 17h27 LT: We did some repetitions on 030-26 (EMIR).
19 - 1 LT, Jean-François: Now opacity around 0.35 and statble with p2p atmo fluctuations less than +/- 2Jy but 3 spikes on the taumeter during the session although sky fairly clear. Move to NIKA2 and project 093-26 and did 9 targets (cal_1scan). Then Observe secondary calibrator MWC349. Then Miren switch to polarimetry with HWP for project 085-25 : source G094.6028 with calibration scan on 3C454 before and after, we add a calibration scan on Uranus that is now above 40deg.
Focus did not change significantly during the session (1.04-1.13). Pointing offsets are large (15") but consistent thru the run.
October 21st, 2026, Wednesday
1 - 7 LT, Philippe: Opacity (tau225) fluctuating between ~0.4 and ~0.3. Observed 1 repetition on G094.6028 and 1 repetition on G100.38 for project 084-25. Did a calibration on Uranus (calib_1scan: 20261021s33) in polarized mode. Took 1 full repetition plus 2 of 3 scans of observe_G111a for 031-26 (stopped after 2 scans as elevation was getting quite low for polarimetry). Switched to TP (47Hz) at 6:45 LT. Did another calibration on Uranus (calib_1scan: 20261021s45) in total power (47Hz) and a skydip (20261021s46)
7 - 13 LT, Samuel: Opacity (tau225) started around 0.3 but steadily dropped throughout the morning to around 0.2. Started with project 082-26 observing NGC4449. Took 4 full repetitions of 2 scans each on NGC4449, then switched to observing IC0342 for project 083-26 because the opacity was so low. Finished one full repetition of 5 scans on IC0342. Project 083-26 is now completed.
13 - 19 LT, Kaiyi:
19 - 1 LT, Jean-François:
October 22nd, 2026, Thursday
October 23rd, 2026, Friday
October 24th, 2026, Saturday
October 25th, 2026, Sunday
October 26th, 2026, Monday