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ENR CTIO Blanco 4-m 2025-10-17

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Date: 
Friday, October 17, 2025
Telescope: 
CTIO Blanco 4-m
Submitter: 
Yuanyuan Zhang
Submitter Email: 
yuanyuan.zhang@noirlab.edu
Observer Support: 
Alfredo Zenteno
Night Assistant: 
Rodrigo Hernandez
Problems: 

Brief power outage at 4:19 local time.

Comments: 

None.

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.00
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky : 
0
2nd Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.00
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
3rd Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
0.90
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
4th Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
0.70
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
Program: 
Proposal: 
2023B-184194
Target of Oportunity: 
No
Time Observed: 
8.5
Time Engineering: 
0.0
Time lost technical: 
0.25
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
IBIS
Primary Investigator: 
Dey, Schlegel
Institution: 
NOAO
Instrument: 
CTIO 4m DECam
Total Program Time: 
8.75
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2025-10-17 8.5 0.0 0.25 0.0 0.0 8.75