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Daily Reports

Jan 10th, Monday

~19:00-22:00; Angel: we took advantage of technical time (T06-21) yielded by Manuel Castillo for NIKA2 general checks and calibrations. Acquisition restarted at ~19:10 after cooling down checks by Dave John and Santiago Navarro. Tau(225 GHz) about 0.25, and quite a stable atmosphere with baseline variations between 1 and 3 Jy/beam (2 mm) during this special shift. After checking the right imbfits file creation, we pointed and focused on Uranus. We got FWHMs 17.2"x17.8" (2 mm); 11.0"x11.6" (1 mm); the antenna seems to be a bit unrelaxed according to the maps. Meanwhile, we checked pointing corrections in the ~150 < Az. < 300 deg and ~20 < El. < 65 deg. ranges. Mean corrections from 11 pointing scans are 6.37" (rms 1.17") in Az. and 2.55" (rms 2.38") in El. according to a report of Robert Zylka. For focus we got -0.6 +/- 0.6 mm (stable and close to the expected values after the intervention of PT100 sensors by Salvador Sánchez in the afternoon). Pointing and focus correction on NGC7027. A set of calib_1scan maps were obtained on that source (20220110s181), MWC349 (s182), and CRL2688 (s183). Very stable at the end of the shift. Coming back to Uranus. Resonances were reworked before pointing and a new focus correction. Beam map (h option) on Uranus (s198).

Jan 11th, Tuesday

[AB] Provisional note: The parameters of a pointing model based on the idem session of early December will be installed by Manuel asap. On the other hand, during the maintenance slot, the telescope engineers have checked in deep the temperature sensors of the antenna back-structure. In the past week, the automatic compensation of temperature gradients was turned off several days due to sensor bad readings and the observers had to increase the frequency of pointing and focus corrections (see the AoD report of Gabriel Paubert). In principle, the system should work appropriately. Otherwise, I will ask you for increasing the frequency of such corrections.

16:00-21:00; Ángel, Matt: Tau(225 GHz) between ~0.20 and 0.25 and very stable (baseline variations between 2 and 5 Jy/beam at 2 mm) all the shift, except from 19:40 to ~20:00 when both parameters triggered (telescope inside the cloud). Three maps (1.5 reps.) on NGC628 (project 160-16) were obtained. After 20:00 we started the observation of source WB89-380 (project 137-21). Calibrations: a skydip (s169) and a calib_1scan on NGC7027 (s186).

~20:45-03:00; Alex : continuing on 137-21 / WB89-380 - WB89-399 - WB89-437 ; nikaw-21 / @skydip + focus on 0355+508 ; switching to 192-16 / COSMOS (2 rounds). Time between the end of '@nkpoint f' and the start of PIIC processing: 1min46s, 1min 54, 2min, 4min 16, 31s, 1min14, 5min49.

Jan 12th, Wednesday

3:00 - 5:00; Emmanuel, Juan, Corentin : Tau(225 GHz) between ~0.20 and 0.25 and very stable, during the first hour we did one pointing on 1156+285 and we launched a scan of PSZ2-G228 but an electronic issue came up with the second matrix --> impossible to proceed the observations. Last scans (20220112s25 and s26) likely corrupted.

05:20- ; Frédéric, Angel. Switching to EMIR backup project 170-21. Targets observed: 38659-low (lines detected after 3 reps.); 54706-low (lines detected after 2 reps.); 53609-low (lines detected, 3 reps.). Arr2 crate issue fixed by Dave John after restarting the corresponding crate by software. Acquisition/imbfits creation restarted after that. Very large (~25"!) pointing corrections after first attempts. Inclinometers updated. Right positioning of the mirrors checked. Wobbler system deactivation verified. Expected pointing corrections recovered. So, scans 20220112s69 to s79 are useless. Karyne Demyk took over at 10:45.

Jan 13th, Thursday

Jan 14th, Friday

Jan 15th, Saturday

Jan 16th, Sunday

Jan 17th, Monday

Jan 18th, Tuesday