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Night Reports 2008

December 2008

DateHours UsedComment
ObservingWeatherTechnical
31 Dec9.30.00.0Non-photometric. 1.6h scheduled shutdown around midnight for leap second reconfiguration.
30 Dec3.77.20.0Non-photometric. High humidity from start of night through to early morning.
29 Dec0.010.90.0Thick cloud and high winds.
28 Dec8.20.02.7Cassegrain axis problems
27 Dec0.010.90.0High Humidity, possible ice.
26 Dec010.90.0High humidity
25 Dec010.90.0Possible ice
24 Dec010.90.0Humidity
23 Dec010.90.0Thick cloud and humidity.
22 Dec10.90.00.0Non-photometric.
21 Dec10.90.00.0Cloud increasing through night. Non-photometric. Oil chiller trip (did not stop observing).
20 Dec9.11.80.0High Humidity. Non-photometric.
19 Dec1.69.30.0High Humidity. Non-photometric
18 Dec8.22.70.0Non-photometric. High humidity at end of night.
17 Dec8.40.02.5Scheduler Problems. Photometric.
16 Dec8.60.02.3Scheduler problems. Photometric? Poorish seeing.
15 Dec0.010.90.0High humidity
14 Dec0.010.90.0High humidity just after startup; no observing
13 Dec6.24.70.0Non-photometric; high humidity & rain in second half of night.
12 Dec0.010.90.0High humidity & rain
11 Dec10.90.00.0Non-photometric
10 Dec10.90.00.0Non-photometric
9 Dec8.91.50.4Non-photometric. High humidity at start of night, followed by Cassegrain torque error causing node reboot
8 Dec9.81.00.0Non-photometric. High humidity at times.
7 Dec10.80.00.0Non-photometric.
6 Dec0.010.80.0Thick Cloud.
5 Dec0.010.80.0Thick Cloud.
4 Dec10.80.00.0Non-photometric. Poor seeing.
3 Dec9.50.01.3Non-photometric. Very poor seeing. AZM node reboot. Cass Torque Errors.
2 Dec8.62.20.0Non-photometric. Thick cloud at times.
1 Dec10.80.00.0Non-photometric.

November 2008

Observing: 164.7 hours
Weather Loss: 131.3 hours
Technical Loss: 9.8 hours

DateHours UsedComment
ObservingWeatherTechnical
30 Nov10.30.00.5Non-photometric; cass node reboot.
29 Nov10.80.00.0Photometric
28 Nov10.70.00.0Non-photometric
27 Nov0.010.70.0Ice on enclosure; no observing
26 Nov0.010.70.0Rain, high humidity, ice
25 Nov7.43.30.0Non-photometric. High humidity/rain from ~0300.
24 Nov6.14.10.5Non-photometric. Cass node reboot, bouts of high humidity & rain.
23 Nov9.40.01.3Non photometric. High humidty at times.
22 Nov0.010.70.0High humidity
21 Nov0.010.70.0High humidity
20 Nov0.010.60.0High humidity
19 Nov2.38.30.0High humidty for most of night.
18 Nov9.70.00.5Non-photometric. 0.4h scheduled downtime for RCS testing; 0.5h AZM node reboot
17 Nov10.60.00.0Non-photometric
16 Nov10.60.00.0Photometric
15 Nov10.10.00.5Cassegrain torque error; non-photometric
14 Nov9.30.01.2Cassegrain torque errors; non-photometric
13 Nov0.010.50.0Thick cloud
12 Nov10.50.00.0Non-photometric
11 Nov10.50.00.0Non-photometric
10 Nov10.50.00.0Non-photometric
9 Nov9.20.01.3Non-photometric; cassegrain torque errors
8 Nov10.40.00.0Non-photometric.
7 Nov10.40.00.0Non-photometric.
6 Nov6.40.04.0Non-photometric. Weather monitoring system problems.
5 Nov0.010.40.0Thick cloud.
4 Nov0.010.40.0Thick cloud.
3 Nov0.010.30.0High humidity
2 Nov0.010.30.0Freezing Fog
1 Nov0.010.30.0Freezing Fog

October 2008

Observing: 134.2 hours
Weather Loss: 129.9 hours
Technical Loss: 13.1 hours

DateHours UsedComment
ObservingWeatherTechnical
31 Oct0.010.30.0Freezing Fog.
30 Oct0.010.30.0High humidity, rain
29 Oct0.010.20.0High humidity, rain, threat of ice
28 Oct0.010.20.0High humidity; rain
27 Oct8.00.81.4High humidity at start of night, cassegrain torque errors during startup
26 Oct0.010.20.0High humidity, rain & wind.
25 Oct5.44.70.0Non-photometric. High humidity, rain, wind
24 Oct7.50.02.6Non-photometric. Enclosure system fault.
23 Oct0.010.10.0High winds.
22 Oct0.00.00.0Scheduled Maintenance (SupIRCam)
21 Oct5.74.30.0Photometric? High humidity at times.
20 Oct8.10.91.0Photometric. High humidty at times. Cass node reboot.
19 Oct0.00.00.0Scheduled maintenance (SupIRCam)
18 Oct0.08.02.0High humidity. Autoguider focus homing failure.
17 Oct4.95.00.0Non-photometric. High humidity second half of night.
16 Oct6.90.03.0Photometric. Cass torque errors.
15 Oct7.42.50.0Photometric. High humidity at times.
14 Oct0.00.00.0Scheduled maintenance (SupIRCam)
13 Oct9.10.00.7Photometric. AZM node reboot.
12 Oct9.10.00.7Cassegrain torque errors
11 Oct0.09.80.0High humidity & rain.
10 Oct4.44.41.0High humidity & rain. Azimuth node reboot, cassegrain axis torque errors.
9 Oct0.09.70.0High humidity & winds; some rain
8 Oct9.00.00.7Non-photometric; cassegrain axis torque errors
7 Oct9.70.00.0Non-photometric.
6 Oct9.70.00.0Photometric (but possible shutter timing problems)
5 Oct9.60.00.0Non-photometric.
4 Oct9.60.00.0Photometric.
3 Oct9.60.00.0Photometric. Poor seeing.
2 Oct0.59.00.0High humidity most of night.
1 Oct0.09.50.0High humidity.

September 2008

Observing: 105.4 hours
Weather Loss: 126.0 hours
Technical Loss: 12.7 hours

DateHours UsedComment
ObservingWeatherTechnical
30 Sep2.57.00.0High humidity most of night.
29 Sep0.39.20.0High humidity almost all of night
28 Sep7.12.30.0High humidity at start of night, non-photometric after
27 Sep0.09.40.0High humidity
26 Sep0.09.40.0High humidity
25 Sep0.09.30.0High humidity & winds
24 Sep0.09.30.0Thick cloud
23 Sep9.30.00.0Photometric
22 Sep9.20.00.0Photometric
21 Sep9.20.00.0Photometric
20 Sep3.16.10.0High humidty at times.
19 Sep9.10.00.0Photometric?
18 Sep0.09.10.0High humidity.
17 Sep0.09.10.0Thick cloud.
16 Sep0.00.00.0Scheduled Maintenance (SupIRCam)
15 Sep0.00.00.0Scheduled Maintenance (SupIRCam)
14 Sep0.09.00.0Thick cloud.
13 Sep7.50.01.5Non-photometric? Chiller Fault.
12 Sep8.90.00.0Photometric?
11 Sep0.08.90.0High humidity.
10 Sep0.00.00.0Scheduled maintenance (mirror cleaning)
9 Sep0.08.80.0High humidity.
8 Sep0.08.80.0High humidity.
7 Sep2.01.65.2Non-photometric. Chiller Fault. High humidity.
6 Sep0.08.70.0Thick cloud.
5 Sep8.70.00.0Non-photometric. Thickish cloud at times.
4 Sep8.70.00.0Photometric. Poor seeing second half of night.
3 Sep8.60.00.0Photometric.
2 Sep8.60.00.0Non-photometric?
1 Sep2.60.06.0Non-photometric. RCS fault following new deployment.

August 2008

Observing: 199.9 hours
Weather Loss: 30.5 hours
Technical Loss: 19.1 hours

DateHours UsedComment
ObservingWeatherTechnical
31 Aug8.50.00.0Non-photometric; some cloud
30 Aug8.50.00.0Non-photometric
29 Aug8.20.00.3Photometric; alt node reboot
28 Aug8.40.00.0Photometric
27 Aug8.40.00.0Photometric
26 Aug8.40.00.0Non-photometric
25 Aug0.00.08.3Oil chiller fault
24 Aug8.30.00.0Non-photometric
23 Aug8.30.00.0Non-photometric
22 Aug8.20.00.0Non-photometric
21 Aug0.08.20.0Thick Cloud.
20 Aug0.08.20.0Thick Cloud.
19 Aug8.10.00.0Photometric.
18 Aug8.10.00.0Photometric.
17 Aug7.60.00.5Non-photometric. Thick cloud at times. Casegrain rotator errors.
16 Aug8.00.00.0Photometric
15 Aug7.80.00.2Photometric. TCS reboot. First half of night used for telescope tests and tuning.
14 Aug8.00.00.0Photometric
13 Aug8.00.00.0Photometric
12 Aug5.52.40.0Photometric; high humidity in middle of night
11 Aug7.90.00.0Photometric
10 Aug7.90.00.0Photometric?
9 Aug7.80.00.0Non-photometric.
8 Aug3.84.00.0Non-photometric. Thick cloud second half of night.
7 Aug6.80.01.0Non-photometric. AMN node reboot.
6 Aug0.07.70.0Heavy Calima.
5 Aug7.70.00.0Non-photometric.
4 Aug7.70.00.0Non-photometric.
3 Aug7.60.00.0Non-photometric.
2 Aug0.00.07.6Incoming power and enclosure problems.
1 Aug6.40.01.2AMN node network problems. Most of the rest of the night used for telescope performance tests and tuning.

July 2008

Observing: 172.2 hours
Weather Loss: 7.0 hours
Technical Loss: 14.9 hours

DateHours UsedComment
ObservingWeatherTechnical
31 Jul7.50.00.0Non-photometric.
30 Jul7.50.00.0Non-photometric.
29 Jul7.50.00.0Photometric.
28 Jul3.50.04.0Network & Cassegrain problems.
27 Jul7.40.00.0Non-photometric
26 Jul7.40.00.0Photometric
25 Jul7.40.00.0Photometric
24 Jul7.40.00.0Non-photometric, SupIRCam offline
23 Jul7.30.00.0Photometric, SupIRCam offline
22 Jul7.30.00.0Photometric? SupIRCam offline.
21 Jul7.30.00.0Photometric? SupIRCam offline.
20 Jul0.00.07.3Chiller Fault, Focus Problem. SupIRCam offline.
19 Jul7.20.00.0Photometric. SupIRCam offline.
18 Jul0.00.00.0Scheduled Maintenance.
17 Jul0.00.00.0Scheduled Maintenance.
16 Jul0.00.00.0Scheduled Maintenance.
15 Jul0.00.00.0Scheduled Maintenance.
14 Jul7.10.00.0Photometric. SupIRCam offline.
13 Jul7.10.00.0Photometric. SupIRCam offline.
12 Jul6.40.00.7Photometric. RATCam computer problems at start of night. SupIRCam offline.
11 Jul7.010.00.0Photometric. SupIRCam offline.
10 Jul7.00.00.0Photometric? SupIRCam offline.
9 Jul5.00.02.0Photometric?. RATCam cooling problems. SupIRCam offline.
8 Jul6.10.00.9Photometric? Cass node reboot and torque problems. SupIRCam offline.
7 Jul7.00.00.0Photometric. SupIRCam offline.
6 Jul0.07.00.0Thick cloud. SupIRCam offline.
5 Jul7.00.00.0Photometric. SupIRCam offline.
4 Jul7.00.00.0Photometric. SupIRCam offline.
3 Jul6.90.00.0Photometric. SupIRCam offline.
2 Jul6.90.00.0Photometric. SupIRCam offline.
1 Jul6.90.00.0Photometric. SupIRCam offline.

June 2008

Observing: 166.0 hours
Weather Loss: 10.7 hours
Technical Loss: 31.0 hours

DateHours UsedComment
ObservingWeatherTechnical
30 Jun2.90.04.0Photometric. Chiller fault. SupIRCam offline.
29 Jun0.06.90.0Calima. SupIRCam offline.
28 Jun5.10.81.0Calima, clearing later. Cass torque errors on startup.SupIRCam offline.
27 Jun6.40.00.5Cass torque errors. Non-photometric. SupIRCam offline part of night.
26 Jun6.60.00.3Alt node reboot, autorecovered. Non-photometric.
25 Jun6.90.00.0Non-photometric.
24 Jun6.90.00.0Photometric. SupIRCam back online. Poor seeing.
23 Jun6.90.00.0Photometric. SupIRCam offline.
22 Jun5.00.01.9Oil chiller tripped. Photometric. SupIRCam offline.
21 Jun6.90.00.0Photometric. SupIRCam offline for part of night.
20 Jun5.20.01.7Cass tracked into limit. Photometric, poor seeing.
19 Jun6.90.00.0Photometric.
18 Jun5.00.01.9Photometric. Cassegrain torque erros.
17 Jun1.10.05.8Photometric. Sitewide mains problems.
16 Jun4.92.00.0Non-photometric. High humidity at end of night.
15 Jun5.91.00.0Photometric; high humidity at end of night
14 Jun6.90.00.0Photometric
13 Jun6.90.00.0Photometric
12 Jun6.90.00.0Photometric
11 Jun6.90.00.0Photometric
10 Jun6.90.00.0Photometric
9 Jun6.90.00.0Photometric
8 Jun0.00.06.9Sitewide mains problems.
7 Jun0.00.07.0Sitewide mains problems.
6 Jun7.00.00.0Photometric. RATCam offline.
5 Jun7.00.00.0Photometric.
4 Jun7.00.00.0Photometric.
3 Jun7.00.00.0Photometric.
2 Jun7.00.00.0Photometric.
1 Jun7.00.00.0Non-photometric

May 2008

Observing: 165.2 hours
Weather Loss: 52.6 hours
Technical Loss: 12.7 hours

DateHours UsedComment
ObservingWeatherTechnical
31 May4.62.50.0High humidity at start of night
30 May0.07.10.0High humidity
29 May4.70.02.4Non-photometric; scattered cloud; altitude node problem in middle of night.
28 May7.10.00.0Non-photometric
27 May6.90.20.0Non-photometric; high humidity at beginning of night
26 May7.20.00.0Non-photometric
25 May7.20.00.0Photometric?
24 May2.15.10.0High humiidty for most of night.
23 May6.50.70.0High humidity at times. Poor seeing.
22 May7.00.00.3Azimuth node failure - recovered. Photometric.
21 May7.30.00.0Photometric.
20 May7.30.00.0Photometric?
19 May7.30.00.0Pointing Test.
18 May7.40.00.0Photometric.
17 May3.44.00.0High humidity at times.
16 May0.05.02.4Autoguider focus and hydraulic faults. Rain and humidity most of the night anyway.
15 May5.02.50.0High humidity until midnight.
14 May7.50.00.0Non-photometric?
13 May6.31.20.0Photometric. High humidity at times.
12 May6.51.00.0Photometric. High humidity at times.
11 May7.60.00.0Photometric.
10 May0.00.07.6Autoguider focus and hydraulics problems.
9 May7.60.00.0Photometric.
8 May0.07.60.0High humidity all night.
7 May0.07.70.0High humidity all night.
6 May7.50.20.0Non-photometric. High humidity at end of night.
5 May7.70.00.0Non-photometric, thick patchy cloud.
4 May7.80.00.0Non-photometric. SupIRCam offline.
3 May7.80.00.0Non-photometric. SupIRCam offline.
2 May0.07.80.0Thick cloud.
1 May7.90.00.0Non-photometic, with thick cloud at times.

April 2008

Observing: 123.1 hours
Weather Loss: 108.8 hours
Technical Loss: 19.2 hours

DateHours UsedComment
ObservingWeatherTechnical
30 Apr0.07.90.0Thick cloud.
29 Apr7.90.00.0Non-photometric. SupIRCam offline.
28 Apr0.08.00.0Heavy Calima (dust in air).
27 Apr0.08.00.0Heavy Calima (dust in air).
26 Apr0.08.00.0Heavy Calima (dust in air) and high winds.
25 Apr0.08.10.0Heavy Calima (dust in air) and high winds.
24 Apr7.70.00.4Non-photometric?. Cass node reboot.
23 Apr8.10.00.0Non-photometric?
22 Apr6.60.01.6Photometric. Cass axis torque errors.
21 Apr8.20.00.0Photometric.
20 Apr8.20.00.0Photometric.
19 Apr7.90.00.4Photometric; altitude node reboot.
18 Apr8.30.00.0Photometric.
17 Apr0.00.08.3Router failure.
16 Apr8.40.00.0Non-photometric.
15 Apr8.00.00.4Non-photometric. Cass node reboot.
14 Apr8.40.00.0Photometric.
13 Apr0.00.08.5Altitude node computer failing to boot.
12 Apr8.50.00.0Non-photometric, with cloud thickening over course of night.
11 Apr0.08.50.0Humidity and ice.
10 Apr0.08.60.0Freezing fog.
9 Apr0.08.60.0Freezing fog.
8 Apr0.08.60.0Rain, high humidity, high winds.
7 Apr0.08.70.0Rain, high humidity, high winds.
6 Apr0.08.70.0Rain, high humidity, high winds.
5 Apr0.08.70.0Rain & high humidity. Some observations during twilight before the weather closed in.
4 Apr3.94.90.0Rain & high humidity at start of night; windy rest of night.
3 Apr6.22.60.0Non-photometric. High winds and high humidity; poor seeing at times.
2 Apr7.90.90.0Non-photometric, high winds.
1 Apr8.90.00.0Non-photometric.

March 2008

Observing: 178.7 hours
Weather Loss: 108.3 hours
Technical Loss: 3.0 hours

DateHours UsedComment
ObservingWeatherTechnical
31 Mar8.90.00.0Photometric
30 Mar6.90.02.0Photometric. SupIRCam control computer stopped responding.
29 Mar7.71.30.0Photometric. High winds around midnight.
28 Mar7.70.80.5Photometric. Humidity spike around midnight; AMN node reboot at 05hUT.
27 Mar9.00.00.0Five arcsecond seeing
26 Mar0.09.00.0Rain, wind, possible ice
25 Mar0.09.10.0Rain, ice
24 Mar0.09.10.0Fog, possible ice.
23 Mar0.09.10.0Fog, rain.
22 Mar0.09.20.0Thick cloud.
21 Mar9.20.00.0Non-photometric
20 Mar0.09.20.0Some observing in twilight only. After that freezing fog.
19 Mar4.05.30.0High humidity at times.
18 Mar9.30.00.0Photometric.
17 Mar6.03.00.3Non-photometric. Pointing test. 2xTCS reboot. Thick cloud at times.
16 Mar0.09.40.0Thick Cloud.
15 Mar9.40.00.0Non-photometric.
14 Mar9.40.00.0Non-photometric.
13 Mar9.40.00.0Non-photometric?
12 Mar0.09.50.0Thick cloud.
11 Mar4.55.00.0Non-photometric. Thick cloud.
10 Mar9.30.00.2Photometric but very poor seeing. TCS reboot.
9 Mar4.94.70.0Photometric; poor seeing at times; high humidity
8 Mar9.60.00.0Photometric
7 Mar9.70.00.0Photometric
6 Mar9.70.00.0Photometric; poor seeing at times
5 Mar4.94.80.0Cloud; non-photometric.
4 Mar9.70.00.0Non-photometric.
3 Mar9.70.00.0Non-photometric.
2 Mar0.09.80.0Cloud
1 Mar9.80.00.0Non-photometric.

February 2008

Observing: 101.7 hours
Weather Loss: 178.0 hours
Technical Loss: 4.1 hours

DateHours UsedComment
ObservingWeatherTechnical
29 Feb7.82.00.0Dust at start of night? Non-photometric.
28 Feb9.20.00.6Non-photometric. Cass node reboot.
27 Feb9.80.00.0Poor seeing. Non-photometric.
26 Feb9.50.00.4Poor seeing. Cass node reboot.
25 Feb1.38.60.0Non-photometric; high winds.
24 Feb0.09.90.0High humidity and ice.
23 Feb0.59.50.0High humidity and ice.
22 Feb1.09.00.0High humidity for most of night.
21 Feb0.010.00.0Cloud, wind, fog
20 Feb0.010.00.0Cloud, wind, fog
19 Feb0.00.00.0Scheduled Maintenance (fitting RISE).
18 Feb9.70.00.4Photometric. AZM node reboot
17 Feb0.010.10.0Wind, rain, fog.
16 Feb0.010.10.0Wind, rain, fog.
15 Feb0.010.10.0Wind, humidity, fog
14 Feb1.48.20.6Chiller problem, then wind and humidity.
13 Feb0.010.20.0Fog & rain
12 Feb0.010.20.0Freezing Fog, Rain, Ice.
11 Feb0.89.40.0High Humidity.
10 Feb0.010.30.0High humidity.
9 Feb0.010.30.0High humidity, wind and rain.
8 Feb0.010.30.0High humidity, wind and rain.
7 Feb10.30.00.0Non-photometric.
6 Feb10.30.00.0Non-photometric; poor seeing.
5 Feb8.30.02.1Non-photometric; scheduler fault.
4 Feb10.40.00.0Non-photometric.
3 Feb0.010.40.0High humidity, risk of ice.
2 Feb1.09.40.0High humidity for most of night.
1 Feb10.40.00.0Non-photometric.

January 2008

Observing: 207.6 hours
Weather Loss: 120.0 hours
Technical Loss: 4.9 hours

DateHours UsedComment
ObservingWeatherTechnical
31 January10.50.00.0Non-photometric.
30 January0.010.50.0Cloud & seeing over 4 arcsec.
29 January10.50.00.0Non-photometric. Poor seeing.
28 January10.60.00.0Non-photometric.
27 January0.010.60.0Cloud.
26 January0.010.60.0Cloud.
25 January10.30.00.3Non-photometric; azimuth node reboot, autorecovered.
24 January0.010.60.0Cloud.
23 January0.010.60.0Cloud.
22 January0.010.60.0Cloud.
21 January0.010.60.0Cloud; calima.
20 January0.010.70.0High winds.
19 January10.70.00.0Non-photometric. Poor seeing.
18 January0.010.70.0Thick cloud.
17 January10.70.00.0Non-photometric.
16 January10.70.00.0Non-photometric. Poor seeing.
15 January10.70.00.0Photometric.
14 January10.70.00.0Photometric.
13 January4.12.93.7Non-photometric; high humidity; autoguider focus mechanism stalled in early morning.
12 January10.80.00.0Non-photometric.
11 January10.80.00.0Non-photometric.
10 January3.67.20.1Non-photometric. High humidity patches through night & aux mech node reboot.
9 January10.90.00.0Non-photometric.
8 January10.90.00.0Non-photometric.
7 January10.10.50.3Non-photometric; some cloud patches. Alt node reboot.
6 January10.90.00.0Non-photometric; some cloud patches.
5 January10.40.00.5Photometric; aux mech node reboot.
4 January9.21.70.0High humidity. Non-photometric. Poor seeing.
3 January4.96.00.0High Wind, High Humidity. Non-photometric.
2 January4.76.20.0High Humidity.
1 January10.90.00.0Photometric. Poor seeing.