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ENR CTIO Blanco 4-m 2014-06-15

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Date: 
Sunday, June 15, 2014
Telescope: 
CTIO Blanco 4-m
Submitter: 
Will Clarkson
Submitter Email: 
wiclarks@umich.edu
Observer Support: 
Kathy Vivas
Night Assistant: 
Claudio Aguilera
Problems: 

Fewer than the 14th. 

Still on the order of ten images experienced guiding problems in the same vein as the 14th; either "no active ccd's" or "continuous null centroids limit exceeded.". On one occasion a small dither (by 2 arcminutes) solved the problem after a repeat exposure also failed. This would be tricky to efficiently implement with our six-filter program.

PSF ellipticity was typically 0.09 in i-band. On about half the occasions when the guider had problems the image was noticeably elongated. There were some images however without guider problems that were visibly elongated (e.g. 323593). 

Comments: 

Generally very smooth operation! 

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Thin Clouds
Wind: 
Low
Seeing Value: 
1.20
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky : 
1
2nd Quarter
Clouds: 
Clear
Wind: 
Medium
Seeing Value: 
1.05
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
3rd Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
0.90
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
4th Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.00
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
Program: 
Proposal: 
2014A-0480
Target of Oportunity: 
No
Time Observed: 
11.5
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
Blanco DECam Bulge Survey
Primary Investigator: 
R. Michael Rich
Email: 
rmr@astro.ucla.edu
Institution: 
UCLA
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
11.5
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2014-06-15 11.5 0.0 0.0 0.0 0.0 11.5