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ENR CTIO Blanco 4-m 2015-07-20

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Date: 
Monday, July 20, 2015
Telescope: 
CTIO Blanco 4-m
Submitter: 
Eduard Rusu
Submitter Email: 
cerusu@ucdavis.edu
Observer Support: 
Leonardo Paredes
Night Assistant: 
Alberto Alvarez
Problems: 

Telescope mirror lost focus around 02:00 UT.  We lost one frame of data (frame 458608).  After the frame finished, it took about 9 minutes to recover.

Comments: 

While the seeing in the first two quarters is high, we were observing in u-band and at high airmass so those numbers should be taken with a grain of salt.  At the beginning of the night when we observed in g, r, i, the seeing was more like 1.0-1.5 arcsec.

Conditions: 
General Conditions
Temperature Max: 
12.00
Temperature Min: 
10.00
Humidity Max: 
20
Humidity Min: 
15
Wind Speed Max: 
28.00
Wind Speed Min: 
10.00
Comment: 
None.
1st Quarter
Clouds: 
Clear
Wind: 
Medium
Seeing Value: 
2.00
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky : 
0
2nd Quarter
Clouds: 
Clear
Wind: 
Medium
Seeing Value: 
1.80
Seeing Variability: 
0.4
Seeing Source: 
The Telescope I used
Sky: 
0
3rd Quarter
Clouds: 
Clear
Wind: 
Medium
Seeing Value: 
1.30
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
4th Quarter
Clouds: 
Clear
Wind: 
Medium
Seeing Value: 
1.20
Seeing Variability: 
0.2
Seeing Source: 
Pachon Seeing Monitor
Sky: 
0
Program: 
Proposal: 
N2015A-0177
Target of Oportunity: 
No
Time Observed: 
10.5
Time Engineering: 
0.0
Time lost technical: 
0.25
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
Deep u-band imaging of a gravitational lens field
Primary Investigator: 
Eduard Rusu
Email: 
cerusu@ucdavis.edu
Institution: 
UC Davis
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
10.75
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2015-07-20 10.5 0.0 0.25 0.0 0.0 10.75