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ENR CTIO Blanco 4-m 2025-10-31

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Date: 
Friday, October 31, 2025
Telescope: 
CTIO Blanco 4-m
Submitter: 
Felipe Fontinele Nunes
Submitter Email: 
fonti007@umn.edu
Observer Support: 
Rodrigo Hernandez
Night Assistant: 
Alberto Alvarez
Also Present: 
Kathy Vivas, Roberto Avilés
Problems: 

Dome closed for ~3h, starting around 00h local time.

Comments: 

None.

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Cirrus
Seeing Value: 
1.80
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky : 
2
2nd Quarter
Clouds: 
Overcast
Seeing Value: 
2.00
Seeing Variability: 
0.4
Seeing Source: 
The Telescope I used
Sky: 
8
3rd Quarter
Clouds: 
Partially cloudy
Seeing Value: 
2.60
Seeing Variability: 
0.4
Seeing Source: 
The Telescope I used
Sky: 
6
4th Quarter
Clouds: 
Clear
Seeing Value: 
2.90
Seeing Variability: 
0.6
Seeing Source: 
The Telescope I used
Sky: 
3
Program: 
Proposal: 
2025B-240381
Target of Oportunity: 
No
Time Observed: 
7.5
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
3.0
Time lost other: 
0.0
Primary Investigator: 
Ahumada
Email: 
tahumada@astro.caltech.edu
Institution: 
California Institute of Technology
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
10.5
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2025-10-31 7.5 0.0 0.0 3.0 0.0 10.5