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ENR CTIO Blanco 4-m 2017-10-24

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Date: 
Tuesday, October 24, 2017
Telescope: 
CTIO Blanco 4-m
Submitter: 
Bob Blum
Submitter Email: 
rblum@noao.edu
Observer Support: 
Hernan Tirado
Night Assistant: 
Rodrigo Hernandez
Problems: 

At 10:40, we raised the shutter a little and closed the later vents to avoid wind shake. The images were a bit high in ellipticity (PA -75).

The ellipticity seems worse at high secz; this may be expected. 

Comments: 

None.

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Thin Clouds
Wind: 
Low
Seeing Value: 
1.30
Seeing Variability: 
0.4
Seeing Source: 
The Telescope I used
Sky : 
3
2nd Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.40
Seeing Variability: 
0.4
Seeing Source: 
The Telescope I used
Sky: 
0
3rd Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.00
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
4th Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
0.90
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
Program: 
Proposal: 
2014B-0404
Target of Oportunity: 
No
Time Observed: 
9.5
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
DECaLS
Primary Investigator: 
Schlegel/Dey
Email: 
dschlegel@lbl.gov
Institution: 
Lawrence Berkeley National Laboratory
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
9.5
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2017-10-24 9.5 0.0 0.0 0.0 0.0 9.5