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ENR CTIO Blanco 4-m 2020-02-05

Date: 
Wednesday, February 5, 2020
Telescope: 
CTIO Blanco 4-m
Submitter: 
Knut Olsen
Submitter Email: 
kolsen@noao.edu
Observer Support: 
Manuel Hernandez
Night Assistant: 
Jackie Seron
Also Present: 
Clara Martinez-Vazquez
Problems: 

Active optics failure at 01:14 UT, moved to zenith to recover.  15 minutes lost.

Active optics failure at 02:36 UT, moved to zenith to recover. ~5 minutes lost.

Active optics failure at 06:51 UT, moved to zenith to recover. ~5 minutes lost.

Active optics failure at 07:54 UT, moved to zenith to recover. ~5 minutes lost.

Active optics failure at 08:07 UT, moved to zenith to recover. ~5 minutes lost.

Active optics failure at 08:28 UT, moved to zenith to recover. ~5 minutes lost.

Active optics failure at 09:02 UT, moved to zenith to recover. ~5 minutes lost.

 

Comments: 

We had seven failures of the active optics/mirror air pressure system tonight, resulting in time lost through the need to move to zenith and recover and through the loss of the exposure when the failure happened.  While the problems were caught quickly and the recoveries handled really well by Jackie and by Manuel, the interruptions and lost exposures led to significant loss of time, 45 minutes by my estimate.

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.15
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky : 
0
2nd Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.25
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
3rd Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.50
Seeing Variability: 
0.4
Seeing Source: 
The Telescope I used
Sky: 
0
4th Quarter
Clouds: 
Clear
Wind: 
Medium
Seeing Value: 
1.30
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
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Program: 
Proposal: 
2019A-0305
Target of Oportunity: 
No
Time Observed: 
7.75
Time Engineering: 
0.0
Time lost technical: 
0.75
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
DELVE Survey
Primary Investigator: 
Alex Drlica-Wagner
Email: 
kadrlica@fnal.gov [1]
Institution: 
Fermilab
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
8.5
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2020-02-05 7.75 0.0 0.75 0.0 0.0 8.5
Source URL (modified on 02/06/2020 - 06:24): http://www.ctio.noao.edu/noao/node/16913

Links
[1] mailto:kadrlica@fnal.gov
[2] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/29144/delete?destination=print/content/enr-ctio-blanco-4-m-2020-02-05
[3] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/29144/edit?destination=print/content/enr-ctio-blanco-4-m-2020-02-05
[4] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/add/node/16913?destination=print/content/enr-ctio-blanco-4-m-2020-02-05