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ENR CTIO Blanco 4-m 2012-11-07

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Date: 
Wednesday, November 7, 2012
Telescope: 
CTIO Blanco 4-m
Submitter: 
Blum
Observer Support: 
Mauricio Rojas
Night Assistant: 
Claudio Aguilera
Also Present: 
D Norman, C Kaleida, A Saha, R Blum
Problems: 
DECam. System worked well. A new pointing map was installed which greatly improved pointing accuracy. However E-W tracking errors returned. These seem to be much worse in the North. At -5 deg Declination, the excursions on the guider strip chart were frequent, regular and up to +/- 2 arcsec. Corresponding images were indeed elongated E-W. The behavior got worse as the telescope rose from the E toward the meridian. Behavior improved at or near zenith and then much improved at -75 deg Declination where excursions seemed random and much smaller.
Conditions: 
1st Quarter
Clouds: 
Clear
Seeing Source: 
CTIO Seeing monitor
Sky : 
0
2nd Quarter
Clouds: 
Clear
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
3rd Quarter
Clouds: 
Clear
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
4th Quarter
Clouds: 
Clear
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
Program: 
Proposal: 
DECam SV
Target of Oportunity: 
No
Time Observed: 
3.5
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
Community SV time
Primary Investigator: 
D Norman
Institution: 
CTIO
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
3.5
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2012-11-07 3.5 0.0 0.0 0.0 0.0 3.5