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| We performed another skydip and at 06:36 we switched to project 160-16, performing firstly a pointing/focus and then going to target NGC4254. High variability of ~10Jy/b at 2mm, we repeat the data acquisition and repeat the scans to test the variability (the Sun is rising which might have caused the effect). Tau is increasing so we move to the more relaxed project 089-22. We took good pointing/focus and we tried one scan on the source J0842-0157 however the tau is increasing, therefore we wait and possibly change to EMIR. | We performed another skydip and at 06:36 we switched to project 160-16, performing firstly a pointing/focus and then going to target NGC4254. High variability of ~10Jy/b at 2mm, we repeat the data acquisition and repeat the scans to test the variability (the Sun is rising which might have caused the effect). Tau is increasing so we move to the more relaxed project 089-22. We took good pointing/focus and we tried one scan on the source J0842-0157 however the tau is increasing, therefore we wait and possibly change to EMIR. [CK: the tau may be jumping up and down only in the Azimuth direction in which the taumeter is pointing ?] |
Daily Reports
Contents
Nov 15th, Tuesday
16:36-21:00; Stergios: No NIKA2 neither EMIR observations were conducted during due to high tau values (see following plot depicting the corresponding tau values for this time window). We performed a quick system check that started at 16:36 (after maintenance) checking only the tuning since we could not perform a pointing or focus due to the weather conditions. For training purposes of the current observers we initiated the data acquisition for NIKA2.
21:00-03:00; Lara: High tau values. No observations.
Nov 16th, Wednesday
03:00-09:00; Stergios: High tau values and rain during the whole shift with increase of the wind velocity. No observations.
09:00-15:00; Rodrigo: Very unstable tau measurements (0.2 < tau < 8.8). Rain and light snow for most part of the shift. No observations.
15:00-21:00; Israel: No observations carried at the telescope due to high values of tau (~5-8) and periodic rains. I attach a picture of the site during the late afternoon
21:00-03:00; Lara: It was not possible to observe with either NIKA2 (tau>0.4) or EMIR (high tau + highly unstable weather conditions).
Nov 17th, Thursday
03:00-09:00; Stergios: Started observations with EMIR at 5:32 under the project 079-22. We tried a couple of pointings which showed high variability in the atmosphere. We stopped around 6:00 due to rain. We started again the observations with EMIR at 7:46, trying pointing under the same project and stopped again at 8:09 due to high values of tau and the fact that we could not obtain a stable pointing. We repeated another data acquisition with NIKA for training purposes. No observations on science targets.
09:00-15:00; Rodrigo: Fog and light rain. High and unstable tau values. Telescope was parked. No observations.
15:00-21:00; Israel: No observations performed due to the foggy weather -high and unstable values of tau (~1-3)-. The whole shift was accompanied by periodic rains.
21:00-03:00; Lara: Due to highly unstable weather conditions and large tau values, it was not possible to observe.
Nov 18th, Friday
03:00-09:00; Stergios: High tau values, rain, fog, no observations.
09:00-15:00; Rodrigo: Heavy snow and high tau values. No observation.
15:00-21:00; Israel: High tau values, snowing, no observations.
21:00-03:00; Lara: Starting pointing test with EMIR at 22:30 pointing to Mars since tau values dropped to ~0.4 with more or less stable weather. We checked some pointings and focus, tau decreasing to 0.1 but there was a bit of instability still. Good pointing after focus, more stable weather, we decided to switch to NIKA2 at 00:30 (Local time). We performed three data acquisitions with the following number of bad pixels (i.e., Ar1, Ar2, Ar3, respectively): 41, 7, 63 | 38, 6, 63 | 43, 7, 61. Very stable atmosphere with tau values around 0.2. We performed a pointing and focus with Mars. At 1:51 am we moved to project 093-22 (higher priority projects not visible at the moment, or with not so great elevation for being observed). Pointing at 0851+202 (focus was done with Mars) go to the source PSZ2G186 (no need for another focus since FWHM 17.2x19). We performed a skydeep at 2:46. We started a flux calibration at ALFORI and moved after back to a pointing at 0851+202.
Nov 19th, Saturday
03:00-09:00; Stergios: We continue with the observations of PSZ2G186 (project 093-22) with excellent weather conditions (tau~0.2, quite stable) until 04:04. We decided to move to COSMOS (project 192-16) performing a pointing/focus on 0851+202 again. The histograms from the data acquisition seem to deviate a bit far from the zero values with the histograms being a bit broad, although this drift should be attributed due to the long COSMOS scan (~52min):
We performed another skydip and at 06:36 we switched to project 160-16, performing firstly a pointing/focus and then going to target NGC4254. High variability of ~10Jy/b at 2mm, we repeat the data acquisition and repeat the scans to test the variability (the Sun is rising which might have caused the effect). Tau is increasing so we move to the more relaxed project 089-22. We took good pointing/focus and we tried one scan on the source J0842-0157 however the tau is increasing, therefore we wait and possibly change to EMIR. [CK: the tau may be jumping up and down only in the Azimuth direction in which the taumeter is pointing ?]
09:00-15:00; Rodrigo:
15:00-21:00; Israel:
21:00-03:00; Lara:
Nov 20th, Sunday
03:00-09:00; Stergios:
09:00-15:00; Rodrigo:
15:00-21:00; Israel:
21:00-03:00; Lara:
Nov 21st, Monday