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ENR CTIO Blanco 4-m 2026-02-20

Date: 
Friday, February 20, 2026
Telescope: 
CTIO Blanco 4-m
Submitter: 
Eshwar Puvvada
Submitter Email: 
epuvvada@purdue.edu
Observer Support: 
Roberto Aviles
Night Assistant: 
Zenteno
Also Present: 
Arjun Dey, Kathy Vivas, Hernan Tirado
Problems: 

SISPI interlock kept breaking over and over again starting at UT 00:10. Problem was identified as miscomunnication between SISPI and telescope shutter.  After multiple tries, a full system restart was done by telescope operators. We regained control around UT 02:31 and started our exposures again. We lost about 20 minutes of observing time

 

Network issues on the mountain made the remote control via Keeper impossible. So, we had to resort to zoom remote control and remote control via old VNC in Tucson observing room 

Comments: 

None.

Conditions: 
General Conditions
Temperature Max: 
21.00
Temperature Min: 
13.00
Humidity Max: 
70
Humidity Min: 
55
Wind Speed Max: 
1.00
Wind Speed Min: 
5.00
Comment: 
None.
1st Quarter
Clouds: 
Clear
Seeing Value: 
1.30
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky : 
0
2nd Quarter
Clouds: 
Clear
Seeing Value: 
1.10
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
3rd Quarter
Clouds: 
Clear
Seeing Value: 
1.00
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
4th Quarter
Clouds: 
Clear
Seeing Value: 
1.10
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
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Program: 
Proposal: 
2023B-184194
Target of Oportunity: 
No
Time Observed: 
8.0
Time Engineering: 
0.0
Time lost technical: 
0.5
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
Effectively Mapping z>2 Universe with Medium-Band Filters
Primary Investigator: 
Dey, Schlegel
Email: 
arjun.dey@noirlab.edu [1]
Institution: 
NOIRLab
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
8.5
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2026-02-20 8.0 0.0 0.5 0.0 0.0 8.5
Source URL (modified on 02/21/2026 - 06:52): http://www.ctio.noao.edu/noao/node/23695

Links
[1] mailto:arjun.dey@noirlab.edu
[2] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/45052/delete?destination=print/content/enr-ctio-blanco-4-m-2026-02-20
[3] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/45052/edit?destination=print/content/enr-ctio-blanco-4-m-2026-02-20
[4] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/add/node/23695?destination=print/content/enr-ctio-blanco-4-m-2026-02-20