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| == Nov 15th, Monday == 19:30-24:00, 10th IRAM 30m School - Observing slot of Working Group IV. Observers: Ioannis & Carsten. Aside from observing a nearby galaxy, we did several calib1 scans on Uranus and a Skydip. Weather conditions were good, stable (tau225~0.15). |
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| 15:00-00:25, 10th IRAM 30m School - Observing slots of Working Groups III (4.5h lost: sub-reflector mounted without servo-amplifiers; then, a failure appeared in the local oscillator box of EMIR-E0: solved by SN) & II (observing OK with NIKA2). | 19:30-24:00, 10th IRAM 30m School - Observing slot of Working Groups II; Juan and Albrecht: observing OK with NIKA2 with tau225 < 0.2, stable; several maps on the Horsehead and W3OH; we got a calib_1scan on Uranus (s179) and a skydip (s181), project s02-21. |
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| 15:00-00:00, 10th IRAM 30m School - Observing slots of Working Groups I and V (everything OK). At the end of the 2nd slot, Working Group V (orange) obtained calib_1scan on NGC7027 (20211117s232), CRL2688 (s233), MWC349 (235) after pointing/focusing on the first source. Then, a beam map on 2251+158 (s244). | 17:30-24:00, 10th IRAM 30m School - Working Group V (orange) observing on the Eyelash (project s05-21); got a calib_1scan on NGC7027 (20211117s232), CRL2688 (s233), MWC349 (s235) after pointing/focusing on the first source. Then, we did a beam map on 2251+158 (s244). |
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| 03:00-09:00, Still stopped. Wind speed has dropped dramatically over the last night, as cloudiness has increased. Snowing. Below is the evolution of the tau225 records and the forecast for the next hours: <<BR>> | Telescope stopped. Dense fog, snow. |
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| [[attachment:attachment:taupred_20211120.png|{{attachment:taupred_20211120.png||width=600}}|target="_blank"]] | [[attachment:attachment:iram30m_20211120.jpg|{{attachment:iram30m_20211120.jpg||width=400}}|target="_blank"]]<<BR>> |
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| 00:00-09:00, telescope stopped. Foggy. Thick clouds. 09:00-15:00, Gianluca, Angel: the deicing system was switched off at ~08:30. Resuming telescope operations at 09:40. Crate 2 and 4 boards of Crate 2 were missing when the acquisition was started. Rebooting crates without effect. Fixed with a complete restart of the crates (power cycle). SN (standby) is aware. Acquisition restarted at 24 Hz, 0.3 < tau225 < 0.4 at the first attempt for pointing/focus on 1253-055. First focus corrections about +1 mm or a bit more, probably as an effect of temperature gradients in the quadrupod (spider). Focus corrections did move to values around zero in about 1 hour. In the meantime, instability and mean opacity values skyrocketed. Telescope stopped at 11:30. Vertex closed. Snowing again at ~12:30. 15:00-20:30, Suzanne and Lara on hold. Telescope stopped. 20:30-21:00, Angel: weather brings an opportunity, tau225 ~0.4, main dish and sub-reflector OK; starting acquisition at 45 Hz. Pointing/focus on 2037+511. Relatively stable. Started one repetition (=4 scans) on A2218 (086-21). 21:00-03:00, Antonio Ferragamo, Aurore Bacmann, and Aishwarya Paliwal: The opacity was extremely unstable and above tau225>0.4. Due to the bad tau225 conditions, we decided to observe the filler project 045-21 throughout the entire shift. As planned by Angel, at the beginning of the night we performed a skydip [20211121s67], then we made three calib_1scan on NGC7027 [20211121s80], CRL2688 [20211121s81], MWC34 [20211121s82]. |
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| 03:00-04:10, Ankur: continuing observations of project 045-21, starting with the field GP233*. Opacity increased suddenly above 1.6. Dense fog. Cancelling observations. Telescope stopped at 04:10. It starts to snow at ~04:30. 04:30-03:00, Matteo, Gianluca, Stavroula, Lara, Marco, and Antonio on-hold. Telescope stopped due to snow and light hail. Taumeter readings apparently stuck between 12:16 and 19:30. |
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04:45, Angel: Opacity < 0.3 and wind gusts speed dropping to ~10 m/s. Checking the antenna. Sergio cleaned as much as possible the sub-reflector and quadrupod from icicles. Starting acquisition with a sampling frequency of 24 Hz. Pointing and focus on 0823+033, pretty stable (baseline variations +/- 1.5 Jy/beam (2 mm). Best focus is about +0.3 mm; a whole day of de-icing power cycles. 06:00-10:30, Ankur: After satisfactory pointing/focus, at 06:40 science observations started with project 085-21 and did 4 reps on source eFEDS3M. Then, did a couple of calib_1scan on Mars (s56, s64) and a skydip (s66). Tau ~ 0.12 all morning. Overall very stable conditions. |
Daily Reports
Because of COVID-19, only IRAM staff is allowed to observe on-site until new notice.
Contents
Nov 15th, Monday
19:30-24:00, 10th IRAM 30m School - Observing slot of Working Group IV. Observers: Ioannis & Carsten. Aside from observing a nearby galaxy, we did several calib1 scans on Uranus and a Skydip. Weather conditions were good, stable (tau225~0.15).
Nov 16th, Tuesday
19:30-24:00, 10th IRAM 30m School - Observing slot of Working Groups II; Juan and Albrecht: observing OK with NIKA2 with tau225 < 0.2, stable; several maps on the Horsehead and W3OH; we got a calib_1scan on Uranus (s179) and a skydip (s181), project s02-21.
Nov 17th, Wednesday
00:35-03:00, Angel: Restarting acquisition, cryo run 68. Opacity below 0.2. Stable. Imbfits creation restarted twice: OK. Pointing/focus on W3OH. Three repetitions on PSZ2G141 (project 199-16).
A timelapse of Manuel Castillo Fraile from this morning:
03:00-09:00, Nicolas Ponthieu on shift. Starting with Angel and Sergio, telescope focused, pointing on Uranus, beam map (20211117s28), calib_1scan (s29), skydip (s30), then one rep of 199-16/PSZ2G141 to complete, then 192-16/cosmos until 9am with focus/pointing around 5h50 and 8h10. The night went smoothly.
09:00-15:00, Angel, Gianluca (invited for further observing training): Opacity around 0.2 about the first third of the shift. 192-16/cosmos continued for ~1h. Then, we got 1.5 reps. on AK4-224 cluster (084-21) with tau225 = 0.20 to 0.25. Some instabilities appeared after that, with opacity increasing from 0.3 to 0.4. Acquisition restarted at 48 Hz at 12h (UT; starting from scan 20211117s124) and 2 reps. were obtained on cluster A1835 of ARSENAL sample (086-21). A broadening of about 1-2 arcsec in the beam size with the best focus correction was observed at the last part of the shift. NIKA2 observations stopped after a calib_1scan on Mars (20211117s141; broadened beam) skydip (s143).
17:30-24:00, 10th IRAM 30m School - Working Group V (orange) observing on the Eyelash (project s05-21); got a calib_1scan on NGC7027 (20211117s232), CRL2688 (s233), MWC349 (s235) after pointing/focusing on the first source. Then, we did a beam map on 2251+158 (s244).
Nov 18th, Thursday
00:00-03:00, Angel: Starting the mini-shift with opacity about 0.2, stable. Two reps. done on pre-stellar core 1390 (007-21). Then, 2 reps. on NGC1333-C2 (010-21); <tau225> about 0.3 at the end.
03:00-09:00, Alexandre Beelen on shift, starting with Angel, telescope focused and pointed, one repetition on NGC1333-C2, pointing, 3 rep on NGC1333-C2, switched to 045-21, weather to variable tau not well fitted, pointing, bloc on GP212_3*, stop after 3 scans due to high wind, restarted, pointing 1 scan on GP212_3*, stop because of snow at 07h (LT).
09:00-15:00, Angel: Observations resumed at 12:40 (LT). Opacity about 0.25, but unstable sometimes according to the variations of pointing/focus baselines at 2 mm. More stable after 13:00. Two repetitions (= 4 scans) on NGC3938 (IMEGIN) before opacity increasing. Acquisition restarted at 48 Hz at 14:10 for changing to ARSENAL targets. Very unstable around 14:30, according to several pointing attempts. Stopped at 14:45, looking at the beginning of the first backup observing slot (with EMIR) on behalf of the 10th IRAM School.
15:00-00:00, 10th IRAM School - Observing slot of Working Group III (conducted by Mónica). Observing until 22:20. Telescope parked. Wind gusts (20-21 m/s) and light hail.
Nov 19th, Friday
Telescope stopped. Strong wind, hail.
Nov 20th, Saturday
Telescope stopped. Dense fog, snow.
Nov 21st, Sunday
00:00-09:00, telescope stopped. Foggy. Thick clouds.
09:00-15:00, Gianluca, Angel: the deicing system was switched off at ~08:30. Resuming telescope operations at 09:40. Crate 2 and 4 boards of Crate 2 were missing when the acquisition was started. Rebooting crates without effect. Fixed with a complete restart of the crates (power cycle). SN (standby) is aware. Acquisition restarted at 24 Hz, 0.3 < tau225 < 0.4 at the first attempt for pointing/focus on 1253-055. First focus corrections about +1 mm or a bit more, probably as an effect of temperature gradients in the quadrupod (spider). Focus corrections did move to values around zero in about 1 hour. In the meantime, instability and mean opacity values skyrocketed. Telescope stopped at 11:30. Vertex closed. Snowing again at ~12:30.
15:00-20:30, Suzanne and Lara on hold. Telescope stopped.
20:30-21:00, Angel: weather brings an opportunity, tau225 ~0.4, main dish and sub-reflector OK; starting acquisition at 45 Hz. Pointing/focus on 2037+511. Relatively stable. Started one repetition (=4 scans) on A2218 (086-21).
21:00-03:00, Antonio Ferragamo, Aurore Bacmann, and Aishwarya Paliwal: The opacity was extremely unstable and above tau225>0.4. Due to the bad tau225 conditions, we decided to observe the filler project 045-21 throughout the entire shift. As planned by Angel, at the beginning of the night we performed a skydip [20211121s67], then we made three calib_1scan on NGC7027 [20211121s80], CRL2688 [20211121s81], MWC34 [20211121s82].
Nov 22nd, Monday
03:00-04:10, Ankur: continuing observations of project 045-21, starting with the field GP233*. Opacity increased suddenly above 1.6. Dense fog. Cancelling observations. Telescope stopped at 04:10. It starts to snow at ~04:30.
04:30-03:00, Matteo, Gianluca, Stavroula, Lara, Marco, and Antonio on-hold. Telescope stopped due to snow and light hail. Taumeter readings apparently stuck between 12:16 and 19:30.
Nov 23rd, Tuesday
04:45, Angel: Opacity < 0.3 and wind gusts speed dropping to ~10 m/s. Checking the antenna. Sergio cleaned as much as possible the sub-reflector and quadrupod from icicles. Starting acquisition with a sampling frequency of 24 Hz. Pointing and focus on 0823+033, pretty stable (baseline variations +/- 1.5 Jy/beam (2 mm). Best focus is about +0.3 mm; a whole day of de-icing power cycles.
06:00-10:30, Ankur: After satisfactory pointing/focus, at 06:40 science observations started with project 085-21 and did 4 reps on source eFEDS3M. Then, did a couple of calib_1scan on Mars (s56, s64) and a skydip (s66). Tau ~ 0.12 all morning. Overall very stable conditions.