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ENR CTIO Blanco 4-m 2025-10-10

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Date: 
Friday, October 10, 2025
Telescope: 
CTIO Blanco 4-m
Submitter: 
Guy Stringfellow (1st half), Cristina Andrade (2nd half)
Submitter Email: 
Guy.Stringfellow@colorado.edu
Observer Support: 
Manuel Hernandez
Night Assistant: 
Claudio Aguilera
Problems: 

~3:50UT OCS-Interlock error. 

SEcond half: Ran into a guiding error for ~10?? minutes of exposure. 

Comments: 

None.

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Thin Clouds
Wind: 
Low
Seeing Value: 
1.20
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky : 
2
2nd Quarter
Clouds: 
Cirrus
Wind: 
Low
Seeing Value: 
1.20
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
8
3rd Quarter
Clouds: 
Cirrus
Wind: 
Low
Seeing Value: 
1.20
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
6
4th Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.30
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
2
Program: 
Proposal: 
2025B-804689
Target of Oportunity: 
No
Time Observed: 
4.0
Time Engineering: 
0.0
Time lost technical: 
0.5
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: 
4.5
Proposal: 
2025A-388357
Target of Oportunity: 
No
Time Observed: 
5.0
Time Engineering: 
0.0
Time lost technical: 
0.25
Time lost weather: 
0.0
Time lost other: 
0.0
Primary Investigator: 
G. Narayan, A. Rest
Email: 
arminrest@gmail.com
Institution: 
STSCI
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
5.25
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2025-10-10 9.0 0.0 0.75 0.0 0.0 9.75