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ENR CTIO Blanco 4-m 2025-09-27

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Date: 
Saturday, September 27, 2025
Telescope: 
CTIO Blanco 4-m
Submitter: 
Hyunmi Song
Submitter Email: 
hmsong@cnu.ac.kr
Observer Support: 
Manuel Hernandez
Night Assistant: 
Claudio Aguilera
Also Present: 
Rodrigo Hinojosa, Alfredo Zenteno
Problems: 

Telescope stopped at 21:23CLT for issues; resolved at 21:31CLT. Issue with program json files resulted in lost observing time however not related to the telescope.

Telescope mount problem at 1:34 CLT; resolved at 1:45 CLT; 10 mins lost

Comments: 

None.

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Clear
Seeing Value: 
1.10
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky : 
0
2nd Quarter
Clouds: 
Clear
Seeing Value: 
1.00
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
3rd Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.15
Seeing Variability: 
0
Seeing Source: 
The Telescope I used
Sky: 
0
4th Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.06
Seeing Variability: 
0
Seeing Source: 
The Telescope I used
Sky: 
0
Program: 
Proposal: 
2025A-388357
Target of Oportunity: 
No
Time Observed: 
10.0
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
DECAT
Primary Investigator: 
Gautham Narayan, Armin Rest
Institution: 
STSCI
Instrument: 
CTIO 4m DECam
Total Program Time: 
10
Proposal: 
2020B-0201
Target of Oportunity: 
No
Time Observed: 
4.5
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: 
NOAO
Total Program Time: 
4.5
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2025-09-27 14.5 0.0 0.0 0.0 0.0 14.5