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ENR CTIO Blanco 4-m 2025-09-07

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Date: 
Sunday, September 7, 2025
Telescope: 
CTIO Blanco 4-m
Submitter: 
Jan Kleyna
Submitter Email: 
kleyna@hawaii.edu
Observer Support: 
Hernan Tirado
Night Assistant: 
Alberto Alvarez
Also Present: 
Rodrigo Hernandez, Roberto Aviles
Problems: 

Humidity prevented observing.

Comments: 

High humidity.   Entire night lost except for short period at start.  Abandoned at 08:20 UT.   All other telescopes closed. 

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Partially cloudy
Precipitation: 
High Humidity
Wind: 
Low
Seeing Value: 
0.00
Seeing Variability: 
0
Seeing Source: 
CTIO Seeing monitor
Sky : 
8
2nd Quarter
Clouds: 
Partially cloudy
Precipitation: 
High Humidity
Wind: 
Low
Seeing Value: 
3.00
Seeing Variability: 
0.6
Seeing Source: 
CTIO Seeing monitor
Sky: 
6
3rd Quarter
Clouds: 
Clear
Precipitation: 
High Humidity
Seeing Value: 
0.00
Seeing Variability: 
0
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
4th Quarter
Clouds: 
Clear
Precipitation: 
High Humidity
Seeing Value: 
0.00
Seeing Variability: 
0
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
Program: 
Proposal: 
2025B-560332
Target of Oportunity: 
No
Time Observed: 
1.25
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
9.0
Time lost other: 
0.0
Description: 
DREAMS
Primary Investigator: 
Zang
Email: 
weicheng.zang@cfa.harvard.edu
Institution: 
Harvard
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
10.25
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2025-09-07 1.25 0.0 0.0 9.0 0.0 10.25