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ENR CTIO Blanco 4-m 2017-07-23

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Date: 
Sunday, July 23, 2017
Telescope: 
CTIO Blanco 4-m
Submitter: 
Bob Blum
Submitter Email: 
rblum@noao.edu
Observer Support: 
Rodrigo Hernandez
Night Assistant: 
Claudio Aguilera
Also Present: 
Alistair Walker (phone)
Problems: 

About 19:50 local. Filter error. Third g filter in a row failed. No filter in place. Seems it was related to low pressure in the filter box. Power cycle filters. Pressure back to normal. But don't know cause. See JIRA for details.

21:30 began again. g, g, r, r, g, then second g failed again. Putting block in works. (seeing still >3"). No pressure issue. Moved filters by command. Ok. 

Comments: 

Great time observing remote from Tucson. Thanks all!

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Clear
Wind: 
Medium
Seeing Value: 
2.50
Seeing Variability: 
1.0
Seeing Source: 
The Telescope I used
Sky : 
0
2nd Quarter
Clouds: 
Clear
Wind: 
Medium
Seeing Value: 
2.50
Seeing Variability: 
0.8
Seeing Source: 
The Telescope I used
Sky: 
0
3rd Quarter
Clouds: 
Clear
Wind: 
Medium
Seeing Value: 
2.00
Seeing Variability: 
0.6
Seeing Source: 
The Telescope I used
Sky: 
0
4th Quarter
Clouds: 
Clear
Wind: 
Medium
Seeing Value: 
1.80
Seeing Variability: 
0.8
Seeing Source: 
The Telescope I used
Sky: 
0
Program: 
Proposal: 
2014B-0404
Target of Oportunity: 
No
Time Observed: 
9.75
Time Engineering: 
0.0
Time lost technical: 
1.5
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
DECaLS
Primary Investigator: 
Schlegel
Email: 
dschlegel@lbl.gov
Institution: 
Lawrence Berkeley National Laboratory
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
11.25
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2017-07-23 9.75 0.0 1.5 0.0 0.0 11.25