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ENR CTIO Blanco 4-m 2026-02-19

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Date: 
Thursday, February 19, 2026
Telescope: 
CTIO Blanco 4-m
Submitter: 
Eshwar Puvvada
Submitter Email: 
epuvvada@purdue.edu
Observer Support: 
Alfredo Zenteno
Night Assistant: 
Hernan Tirado
Also Present: 
Brendan O'Connor, Tomas Ahumada, Roberto Aviles, John Franklin Crenshaw
Problems: 

None.

Comments: 

SISPI interlock was broken at the end of night. TO on site, Robert Aviles fixed it immediately. 

Conditions: 
General Conditions
Temperature Max: 
22.00
Humidity Max: 
40
Humidity Min: 
18
Wind Speed Max: 
6.00
Wind Speed Min: 
2.00
Comment: 
None.
1st Quarter
Clouds: 
Clear
Seeing Value: 
1.20
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky : 
0
2nd Quarter
Clouds: 
Clear
Seeing Value: 
1.00
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
3rd Quarter
Clouds: 
Thin Clouds
Wind: 
Low
Seeing Value: 
0.90
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky: 
3
4th Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.00
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky: 
3
Program: 
Proposal: 
2025A-388357
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
Primary Investigator: 
Narayan-Rest
Email: 
gsn@illinois.edu
Institution: 
University of Illinois Urbana-Champaign
Instrument: 
CTIO 4m DECam
Organization: 
N/A
Total Program Time: 
4.5
Proposal: 
2023B-184194
Target of Oportunity: 
No
Time Observed: 
4.0
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
Efficiently mapping the z>2 galaxies
Primary Investigator: 
Arjun Dey, David Schlegel
Email: 
arjun.dey@noirlab.edu
Institution: 
NOIRLab
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
4
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2026-02-19 8.5 0.0 0.0 0.0 0.0 8.5