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ENR CTIO Blanco 4-m 2023-09-03

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Date: 
Sunday, September 3, 2023
Telescope: 
CTIO Blanco 4-m
Submitter: 
Alfredo Zenteno
Submitter Email: 
alfredo.zenteno@noirlab.edu
Observer Support: 
Manuel Hernandez
Night Assistant: 
Claudio Aguilera
Also Present: 
Bernardita Ried
Comments: 
Bernardita Ried wrote for the night:
 

20:11 (EVE -10) - 23:00; We didn't observe because the humidity was oscillating between 78-82%

 
23:00 - 1:45; Humidity was still changing and we lost connection with the weather station. We started to measure the humidity with an instrument on site. At 1 am the humidity stabilized to 76%. We open the telescope at 1:40 am.
 
1:45 - 4:30; We had a lot of issues: at 1:50 am we had an error in the delivery of the image from the camera to the computer. We changed the ID proposal to 2023B-307896 at 2:15 am and the images started to be saved and displayed on our computers. At 2:30 am images were out of focus, the hexapod was not moving due to the low temperature and the high humidity. It was fixed after a restart of the focus. At 2:45 am the script python 2.7 -u dicbot.py --exptime = 80 | tee ... Was not working and no images were taken. Alfredo solved this at 2:55 am when changing the propID back to 2014B-0404 and it worked. The seeing was in 1.4 arcsec. We got the first picture at 3:00 am and St 3:15 am we started to see some cirrus clouds. Seeing continued stable at 1.4.
 
4:30 - 7:15; We took data until 6:30 am, when the clouds appeared and they were too high. The seeing reached the value of 1.33 arcsec to 1.45. We closed the telescope at 6:30 am.
Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Thin Clouds
Precipitation: 
High Humidity
Seeing Value: 
0.00
Seeing Variability: 
0
Seeing Source: 
CTIO Seeing monitor
Sky : 
2
2nd Quarter
Clouds: 
Thin Clouds
Precipitation: 
High Humidity
Seeing Value: 
0.00
Seeing Variability: 
0
Seeing Source: 
CTIO Seeing monitor
Sky: 
2
3rd Quarter
Clouds: 
Thin Clouds
Precipitation: 
High Humidity
Seeing Value: 
1.30
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
1
4th Quarter
Clouds: 
Clear
Seeing Value: 
0.00
Seeing Variability: 
0
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
Program: 
Proposal: 
2023B-307896
Target of Oportunity: 
No
Time Observed: 
2.5
Time Engineering: 
0.0
Time lost technical: 
1.0
Time lost weather: 
6.5
Time lost other: 
0.0
Description: 
DECaLS extension
Primary Investigator: 
Schlegel and Dey
Email: 
arjun.dey@noirlab.edu
Institution: 
NOAO
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
10
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2023-09-03 2.5 0.0 1.0 6.5 0.0 10