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ENR CTIO Blanco 4-m 2025-09-24

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Date: 
Wednesday, September 24, 2025
Telescope: 
CTIO Blanco 4-m
Submitter: 
Chris Lidman
Submitter Email: 
christopher.lidman@anu.edu.au
Observer Support: 
Manuel Hernandez
Night Assistant: 
Claudio Aguilera
Also Present: 
Rodrigo Hinojosa, K. Boutsia, Ting Li, Sean Mac Bride, Lillian Joseph
Problems: 

None.

Comments: 

None.

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.50
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky : 
0
2nd Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.30
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
3rd Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.20
Seeing Variability: 
0.4
Seeing Source: 
The Telescope I used
Sky: 
0
4th Quarter
Clouds: 
Clear
Wind: 
Medium
Seeing Value: 
1.00
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
Program: 
Proposal: 
2023B-184194
Target of Oportunity: 
No
Time Observed: 
4.25
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
IBIS
Primary Investigator: 
Dey-Schlegel
Email: 
arjun.dey@noirlab.edu
Institution: 
NOAO
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
4.25
Proposal: 
2025B-485252
Target of Oportunity: 
yes
Time Observed: 
0.75
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
ToO followup of LVK trigger S250830bp
Primary Investigator: 
Soares-Santos
Email: 
marcelle@physik.uzh.ch
Institution: 
University of Zurich
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
0.75
Proposal: 
2025A-388357
Target of Oportunity: 
No
Time Observed: 
5.0
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
Chasing Extremely Young Transients
Primary Investigator: 
Narayan-Rest
Email: 
gsn@illinois.edu
Institution: 
University of Illinois at Urbana-Champaign
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
5
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2025-09-24 10.0 0.0 0.0 0.0 0.0 10