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ENR CTIO Blanco 4-m 2025-10-18

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Date: 
Saturday, October 18, 2025
Telescope: 
CTIO Blanco 4-m
Submitter: 
Gautham Narayan
Submitter Email: 
gsn@illinois.edu
Observer Support: 
Rodrigo Hernandez
Night Assistant: 
Alberto Alvarez
Also Present: 
Alfredo Zenteno
Problems: 

Problem with DESIRT 20 20 i 1 json last two exposures - exposure ID was 1426941. Restarted queue at 4:58 AM UTC, but 1426942 also failed.
Problem traced to DECAL machine (that does calibration).
Alberto restarted machine at 5:04 AM UTC and restarted queue at 5:07 AM UTC with exposure 1426944.
Roughly ~10 min lost. 

Comments: 

None.

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Clear
Seeing Value: 
1.00
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky : 
0
2nd Quarter
Clouds: 
Clear
Seeing Value: 
1.10
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
3rd Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.00
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
4th Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.10
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
Program: 
Proposal: 
2025A-729671
Target of Oportunity: 
No
Time Observed: 
8.75
Time Engineering: 
0.0
Time lost technical: 
0.25
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
DESI Transients Survey
Primary Investigator: 
Antonella Palmese
Email: 
apalmese@andrew.cmu.edu
Institution: 
Carnegie-Mellon University
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
9
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2025-10-18 8.75 0.0 0.25 0.0 0.0 9