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CTIO Home > ENR CTIO Blanco 4-m 2022-04-20

ENR CTIO Blanco 4-m 2022-04-20

Date: 
Wednesday, April 20, 2022
Telescope: 
CTIO Blanco 4-m
Submitter: 
Antonella Palmese
Submitter Email: 
palmese@berkeley.edu
Observer Support: 
Hernan Tirado
Night Assistant: 
Alberto Alvarez
Also Present: 
Alfredo Zenteno, Humberto Orrego
Problems: 
r and Y have  particularly low zero points based on afternoon calibrations. We are not sure this is OK.
Environment seeing monitor does not work.
We lost about 5 minutes due to bad pointing at the beginning of the night.
20:50 Local time: The telescope operators realized the F/8 chimney cover was missing and went to put it on. 30 minutes were lost because of this. Putting the cover on seems to have improved on the seeing, which went from 3-4 to <2 arcsec. The lack of cover may have been causing heating and turbulence, and in fact Gemini was recording a much lower seeing. CTIO site monitoring is not working for the seeing, so we cannot compare with CTIO environmental seeing to confirm that the lack of cover was the cause.
3:50 Local time: Pointing off by ~40 arcsec for the past few hours, correcting it now.
Comments: 

Exposures from 107293 are affected by the alert “Time stamps out of sync”, difference 31 second. It may be a result of today’s power outage that affected exactly that card. It should not be a problem for these exposures though.

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
2.00
Seeing Variability: 
1.0
Seeing Source: 
Other
Sky : 
1
2nd Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.20
Seeing Variability: 
0.6
Seeing Source: 
Other
Sky: 
0
3rd Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.20
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
4th Quarter
Clouds: 
Clear
Seeing Value: 
1.20
Seeing Variability: 
0.4
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
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Program: 
Proposal: 
2020B-0053
Target of Oportunity: 
No
Time Observed: 
11.25
Time Engineering: 
0.0
Time lost technical: 
0.75
Time lost weather: 
0.0
Time lost other: 
0.0
Primary Investigator: 
Brout
Instrument: 
CTIO 4m DECam
Total Program Time: 
12
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2022-04-20 11.25 0.0 0.75 0.0 0.0 12
Source URL (modified on 04/21/2022 - 07:22): http://www.ctio.noao.edu/noao/node/18863

Links
[1] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/40911/delete?destination=print/content/enr-ctio-blanco-4-m-2022-04-20
[2] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/40911/edit?destination=print/content/enr-ctio-blanco-4-m-2022-04-20
[3] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/add/node/18863?destination=print/content/enr-ctio-blanco-4-m-2022-04-20