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ENR CTIO Blanco 4-m 2025-09-28

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Date: 
Sunday, September 28, 2025
Telescope: 
CTIO Blanco 4-m
Submitter: 
Tomas Cabrera
Submitter Email: 
tcabrera@andrew.cmu.edu
Observer Support: 
Manuel Hernandez
Night Assistant: 
Claudio Aguilera
Also Present: 
Kathy Vivas, Rodrigo Hinojosa, Chin Yi Tan, Elliott Burdett, Nicole Firestone, Eshwar Puvvada
Problems: 

Brief issue with TCS at 3:45 local time; next exposure started at 3:51

Comments: 

None.

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
0.90
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky : 
0
2nd Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
0.90
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
3rd Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
0.92
Seeing Variability: 
0
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
4th Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
0.90
Seeing Variability: 
0
Seeing Source: 
The Telescope I used
Sky: 
0
Program: 
Proposal: 
2025B-804689
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: 
DELVE
Primary Investigator: 
Alex Drlica-Wagner
Email: 
kadrlica@uchicago.edu
Institution: 
The University of Chicago
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
5
Proposal: 
2020B-0201
Target of Oportunity: 
No
Time Observed: 
2.0
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
The One-hundred-sqdeg DECam Imaging in Narrowbands
Primary Investigator: 
Kyoung-Soo Lee
Email: 
soolee@purdue.edu
Institution: 
Purdue University
Instrument: 
CTIO 4m DECam
Organization: 
N/A
Total Program Time: 
2
Proposal: 
2023B-851374
Target of Oportunity: 
No
Time Observed: 
3.0
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
GW-MMADS: Gravitational Wave Multi-Messenger Astronomy DECam Survey
Primary Investigator: 
Andreoni and Palmese
Email: 
apalmese@andrew.cmu.edu
Institution: 
Carnegie Mellon University
Instrument: 
CTIO 4m DECam
Total Program Time: 
3
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2025-09-28 10.0 0.0 0.0 0.0 0.0 10