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ENR CTIO Blanco 4-m 2021-07-04

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Date: 
Sunday, July 4, 2021
Telescope: 
CTIO Blanco 4-m
Submitter: 
Ian Dell'Antonio
Submitter Email: 
ian_dellantonio@brown.edu
Observer Support: 
Kathy Vivas
Night Assistant: 
Alberto Alvarez
Also Present: 
Fernando Cortez, Shenming Fu
Problems: 

The focus setting at the beginning was bad again--it was fixed by taking a sequence of junk exposures in twilight.

Comments: 

Thick cirrus all night.  0.5-2 magnitudes of extinction.  Seeing started o.k. and then deteriorated. 

Conditions: 
General Conditions
Comment: 
Lots of thick cirrus. All observations about 20% efficient.
1st Quarter
Clouds: 
Overcast
Wind: 
Low
Seeing Value: 
1.10
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky : 
6
2nd Quarter
Clouds: 
Overcast
Wind: 
Low
Seeing Value: 
1.40
Seeing Variability: 
0.4
Seeing Source: 
The Telescope I used
Sky: 
7
3rd Quarter
Clouds: 
Overcast
Seeing Value: 
1.40
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
6
4th Quarter
Clouds: 
Partially cloudy
Seeing Value: 
1.40
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
5
Program: 
Proposal: 
2019A-0308
Target of Oportunity: 
No
Time Observed: 
11.25
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
LoVoCCS, The Local Volume Complete Cluster Survey
Primary Investigator: 
Dell'Antonio
Email: 
ian_dellantonio@brown.edu
Institution: 
Brown University
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
2021-07-04 11.25 0.0 0.0 0.0 0.0 11.25