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ENR CTIO Blanco 4-m 2025-12-12

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Date: 
Friday, December 12, 2025
Telescope: 
CTIO Blanco 4-m
Submitter: 
T. Ahumada
Submitter Email: 
tomas.ahumada@noirlab.edu
Observer Support: 
Hernan Tirado
Night Assistant: 
Rodrigo Hernandez
Also Present: 
A. Gouldemans, K. Boutsia , K. Vivas
Problems: 

None.

Comments: 

None.

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.30
Seeing Variability: 
0.4
Seeing Source: 
The Telescope I used
Sky : 
0
2nd Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.10
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
3rd Quarter
Clouds: 
Clear
Seeing Value: 
1.10
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
4th Quarter
Clouds: 
Clear
Seeing Value: 
1.90
Seeing Variability: 
0.4
Seeing Source: 
The Telescope I used
Sky: 
0
Program: 
Proposal: 
2023B-184194
Target of Oportunity: 
No
Time Observed: 
4.0
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
IBIS survey
Primary Investigator: 
Dey, Schlegel
Email: 
arjun.dey@noirlab.edu
Institution: 
NOIRLab
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
4
Proposal: 
2025B-240381
Target of Oportunity: 
No
Time Observed: 
4.0
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
A volumetric increase of ZTF with DECam
Primary Investigator: 
Tomas Ahumada
Email: 
tomas.ahumada@noirlab.edu
Institution: 
NOIRLab
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
4
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2025-12-12 8.0 0.0 0.0 0.0 0.0 8