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ENR CTIO Blanco 4-m 2025-09-21

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Date: 
Sunday, September 21, 2025
Telescope: 
CTIO Blanco 4-m
Submitter: 
Conor Ransome
Submitter Email: 
cransome@arizona.edu
Observer Support: 
Hernan Tirado
Night Assistant: 
Alberto Alvarez
Also Present: 
Rodrigo Angulo, Conor Ransome, Bhagya Subrayan, Roberto Aviles
Problems: 

At 1219 MST, there was a problem with the telescope mount. Observing was paused and the telescope moved to zenith. The issue was resolved at around 1224, and we restarted observations. This resulted in us being around 6/7 minutes behind the ideal schedule. Effected frames are around DECam_01419266.  As a result, not all of the morning twilight fields were observed. 

Comments: 

None.

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Clear
Seeing Value: 
1.60
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky : 
0
2nd Quarter
Clouds: 
Clear
Seeing Value: 
2.00
Seeing Variability: 
0.4
Seeing Source: 
CTIO Seeing monitor
Sky: 
1
3rd Quarter
Clouds: 
Clear
Seeing Value: 
1.50
Seeing Variability: 
0.4
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
4th Quarter
Clouds: 
Clear
Seeing Value: 
1.50
Seeing Variability: 
0.4
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
Program: 
Proposal: 
2025A-388357
Target of Oportunity: 
No
Time Observed: 
9.75
Time Engineering: 
0.0
Time lost technical: 
0.25
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
Chasing Extremely Young Transients
Primary Investigator: 
Gautham Narayam, Armin Rest
Email: 
gsn@illinois.edu
Institution: 
University of Illinois at Urbana-Champaign
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
10
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2025-09-21 9.75 0.0 0.25 0.0 0.0 10