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ENR CTIO Blanco 4-m 2017-09-14

Date: 
Thursday, September 14, 2017
Telescope: 
CTIO Blanco 4-m
Submitter: 
Arjun Dey
Submitter Email: 
dey@noao.edu
Observer Support: 
Alistair Walker
Night Assistant: 
Claudio Aguilera
Also Present: 
Hernan Tirado
Problems: 

We had two minor problems:

[1] The Observer Console screen froze and caused the exposure queue to stop. Alistair suggested that this could have been caused by the system was not responding, resulting in the queue (which for DECaLS only has 2 exposures in it at any given time) running out without being re-filled by the decbot observing script. This was compounded by the observer not paying close attention, and we lost a total of 13 min before we reloaded the Observer Console window, restarted the queue and were exposing again.

[2] At 01:40ut the telescope beam was occulted by the dome during exposure # 677659. The alarm went off, but observing was not interrupted.

 

Comments: 

No significant instrument or telescope problems. Clear skies, but the seeing was terrible (1.6-3.5") for most of the night. The median value was 2.2"

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Clear
Wind: 
Medium
Seeing Value: 
3.00
Seeing Variability: 
0.6
Seeing Source: 
The Telescope I used
Sky : 
0
2nd Quarter
Clouds: 
Clear
Wind: 
Medium
Seeing Value: 
2.50
Seeing Variability: 
0.6
Seeing Source: 
The Telescope I used
Sky: 
0
3rd Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.90
Seeing Variability: 
0.6
Seeing Source: 
The Telescope I used
Sky: 
0
4th Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.90
Seeing Variability: 
0.6
Seeing Source: 
The Telescope I used
Sky: 
0
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Program: 
Proposal: 
2014B-0404
Target of Oportunity: 
No
Time Observed: 
9.75
Time Engineering: 
0.0
Time lost technical: 
0.25
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
DECaLS
Primary Investigator: 
David Schlegel
Email: 
djschlegel@lbl.gov [1]
Institution: 
Lawrence Berkeley National Laboratory
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
10
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2017-09-14 9.75 0.0 0.25 0.0 0.0 10
Source URL (modified on 09/15/2017 - 07:08): http://www.ctio.noao.edu/noao/content/ENR-CTIO-Blanco-4-m-2017-09-14

Links
[1] mailto:djschlegel@lbl.gov
[2] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/4213/delete?destination=print/node/12552
[3] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/4213/edit?destination=print/node/12552
[4] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/add/node/12552?destination=print/node/12552