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ENR CTIO Blanco 4-m 2019-12-27

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Date: 
Friday, December 27, 2019
Telescope: 
CTIO Blanco 4-m
Submitter: 
William Dawson
Submitter Email: 
willdawson@llnl.gov
Observer Support: 
Kathy Vivas
Night Assistant: 
Alberto Alvarez
Also Present: 
Rodrigo Hernandez
Problems: 

None really. Only minor issue was that there were clouds at the start of the night which interfered with the pointing/centering operation. At one point the center command suggested an offset of ~300 (vs the typical value of a few). It is believed that this is because there were too few stars to reach a valid solution. So we reobserved another 30 second exposure since the clouds were patchy and moving rapidly. After two more 30 second exposures we converged to a solution.

Comments: 

None.

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Partially cloudy
Wind: 
Low
Seeing Value: 
0.90
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky : 
6
2nd Quarter
Clouds: 
Partially cloudy
Wind: 
Low
Seeing Value: 
0.90
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
6
3rd Quarter
Clouds: 
Cirrus
Wind: 
Low
Seeing Value: 
0.90
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
6
4th Quarter
Clouds: 
Cirrus
Wind: 
Low
Seeing Value: 
0.90
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
4
Program: 
Proposal: 
2018A-0273
Target of Oportunity: 
No
Time Observed: 
7.25
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
PALS microlensing survey of black holes
Primary Investigator: 
William Dawson
Email: 
willdawson@llnl.gov
Institution: 
Lawrence Livermore National Lab
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
2019-12-27 7.25 0.0 0.0 0.0 0.0 7.25