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ENR CTIO Blanco 4-m 2015-10-25

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Date: 
Sunday, October 25, 2015
Telescope: 
CTIO Blanco 4-m
Submitter: 
Kathy Vivas
Submitter Email: 
kvivas@ctio.noao.edu
Observer Support: 
Manuel Hernandez
Night Assistant: 
Alberto Alvarez
Problems: 

Three images look like having readout problems. In images 487537 and 487538, stars appear quite elongated and with a funny shape (it is not the elongation one gets with no guiding). Sky was quite cloudy at that time but guider had stars and seemed to be working properly. Image 487539 is just readout noise (I think). 

I stopped the queue and took three bias (540-542). They looked normal. Next, I did a test image (543) with 15s exposure, and it was ok again (round stars).

That was the last image taken before the sky got completely overcast.

Comments: 

Only 1 hour of data at the start of the night. Overcast after that.

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Partially cloudy
Wind: 
Low
Seeing Value: 
1.50
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky : 
2
2nd Quarter
Clouds: 
Overcast
Wind: 
Low
Seeing Value: 
0.00
Seeing Variability: 
0
Seeing Source: 
CTIO Seeing monitor
Sky: 
8
3rd Quarter
Clouds: 
Overcast
Wind: 
Medium
Seeing Value: 
0.00
Seeing Variability: 
0
Seeing Source: 
CTIO Seeing monitor
Sky: 
8
4th Quarter
Clouds: 
Overcast
Wind: 
Medium
Seeing Value: 
0.00
Seeing Variability: 
0
Seeing Source: 
CTIO Seeing monitor
Sky: 
8
Program: 
Proposal: 
2013B-0440
Target of Oportunity: 
No
Time Observed: 
1.0
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
7.75
Time lost other: 
0.0
Description: 
SMASH
Primary Investigator: 
David Nidever
Email: 
dnidever@umich.edu
Institution: 
U. Michigan
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
8.75
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2015-10-25 1.0 0.0 0.0 7.75 0.0 8.75