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ENR CTIO Blanco 4-m 2012-12-11

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Date: 
Tuesday, December 11, 2012
Telescope: 
CTIO Blanco 4-m
Submitter: 
Knut Olsen
Observer Support: 
Hernan Tirado
Night Assistant: 
Alberto Alvarez
Problems: 
Throughout the night, Monsoon crate 3 complained about high humidity. We were advised by the experts that the humidity reading of 40% was not something we needed to worry about. At the beginning of the night, the guider failed to engage and reported its status as Error. As the exposures were relatively short, we finished the sequence without guiding. Resetting and reconfiguring the guider got it working again. During the next set of observations, one of the guider images showed that the guider had picked what looked like the diffraction spike of a bright star to guide on. Two of the other chips picked good stars, and these seemed to dominate the guide pulses, so no harm done. The guider indicator light remained off the entire night even while guiding was working.
Comments: 
Good first night with DECam! Please deliver same photometric skies but with better seeing tomorrow. Thanks. Hope the new dryer is installed soon, so sleeping astronomers don't have to live with the high-pitched squeal from the old one.
Conditions: 
General Conditions
Comment: 
This is way too much detail to ask an astronomer to provide when the information exists in the weather database. Please read these values off the weather logs. Thanks.
1st Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.20
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky : 
0
2nd Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.20
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
3rd Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.40
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
4th Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.30
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
Program: 
Proposal: 
2012B-0416
Target of Oportunity: 
No
Time Observed: 
7.0
Time Engineering: 
0.0
Time lost technical: 
0.25
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
Magellanic Clouds Pilot Program
Primary Investigator: 
Nidever
Email: 
dnidever@umich.edu
Institution: 
U. Michigan
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
7.25
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2012-12-11 7.0 0.0 0.25 0.0 0.0 7.25