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ENR CTIO Blanco 4-m 2025-05-15

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Date: 
Thursday, May 15, 2025
Telescope: 
CTIO Blanco 4-m
Submitter: 
Himanshu Verma
Submitter Email: 
hverma@lsu.edu
Observer Support: 
Hernan Tirado
Night Assistant: 
Alberto Alvarez
Also Present: 
Tomás Cabrera, Roberto Aviles, Matthew Penny
Problems: 

SISPI broke at 23:44 local time due to a mounting error.  Resolved in 6 minutes.

Comments: 

The clouds for most of the second half of the night

Conditions: 
General Conditions
Temperature Max: 
16.00
Temperature Min: 
11.00
Humidity Max: 
21
Humidity Min: 
9
Wind Speed Max: 
10.00
Wind Speed Min: 
3.00
Comment: 
None.
1st Quarter
Clouds: 
Cirrus
Wind: 
Low
Seeing Value: 
1.50
Seeing Variability: 
0.8
Seeing Source: 
The Telescope I used
Sky : 
4
2nd Quarter
Clouds: 
Overcast
Wind: 
Medium
Seeing Value: 
2.00
Seeing Variability: 
1.0
Seeing Source: 
The Telescope I used
Sky: 
7
3rd Quarter
Clouds: 
Overcast
Wind: 
Medium
Seeing Value: 
0.00
Seeing Variability: 
0
Seeing Source: 
CTIO Seeing monitor
Sky: 
8
4th Quarter
Clouds: 
Partially cloudy
Wind: 
Low
Seeing Value: 
1.40
Seeing Variability: 
0.4
Seeing Source: 
CTIO Seeing monitor
Sky: 
1
Program: 
Proposal: 
2025A-603790
Target of Oportunity: 
No
Time Observed: 
6.0
Time Engineering: 
0.0
Time lost technical: 
0.25
Time lost weather: 
5.0
Time lost other: 
0.0
Description: 
DECam Follow-up on Newly Discovered Ultra-Faint Dwarf Galaxies
Primary Investigator: 
Chin Yi Tan
Email: 
chinyi@uchicago.edu
Institution: 
The University of Chicago
Instrument: 
CTIO 4m DECam
Total Program Time: 
11.25
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2025-05-15 6.0 0.0 0.25 5.0 0.0 11.25