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ENR CTIO Blanco 4-m 2025-11-14

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Date: 
Friday, November 14, 2025
Telescope: 
CTIO Blanco 4-m
Submitter: 
Ali Crisp
Submitter Email: 
crisp.92@osu.edu
Observer Support: 
Kathy Vivas
Night Assistant: 
Hernan Tirado
Also Present: 
Rodrigo Hernandez, Alberto Alvarez, Roberto Aviles
Problems: 
4MAP changed its status from 'AIR ON' to 'TCS down > 10s' at 02:05:31.724698 CLT.  As a consequence the file 1435401 shows stars as triangles.
 
In the TCS_tlmy table and there found that there is NO data between 02:01:23 and 02:08:31 which may suggest the problem was in the TCS and then the 4MAP crashed as a result of that condition.
It took 5 minutes to recover the 4 MAP but in all we lost 20 minutes because, even though the queue was in STOP, the integration 1435402 did not stop, so we had to wait.
For the record, as a difference to other 4MAP failures, this time the mount did not crash, this is, the brakes were not activated.
Comments: 

None.

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
0.90
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky : 
0
2nd Quarter
Clouds: 
Clear
Seeing Value: 
0.90
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
3rd Quarter
Clouds: 
Clear
Seeing Value: 
0.90
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
4th Quarter
Clouds: 
Clear
Seeing Value: 
1.00
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
Program: 
Proposal: 
2023B-851374
Target of Oportunity: 
yes
Time Observed: 
3.0
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
GW-MMADS
Primary Investigator: 
Andreoni, Palmese
Email: 
palmese@cmu.edu
Institution: 
UNC/CMU
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
3
Proposal: 
2025B-351167
Target of Oportunity: 
No
Time Observed: 
0.75
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
Monitoring SDSS-RM Fields
Primary Investigator: 
Martinez
Email: 
mmartinez@das.uchile.cl
Institution: 
Universidad de Chile
Instrument: 
CTIO 4m DECam
Organization: 
Chile
Total Program Time: 
0.75
Proposal: 
2025B-285894
Target of Oportunity: 
No
Time Observed: 
4.0
Time Engineering: 
0.0
Time lost technical: 
0.25
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
DECam [OIII] Survey of the Magellanic Clouds
Primary Investigator: 
Sean Points
Email: 
sean.points@noirlab.edu
Institution: 
CTIO
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
4.25
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2025-11-14 7.75 0.0 0.25 0.0 0.0 8