Night Report Sky Conditions

E.g., 07/10/2025
Title Conditions
ENR CTIO Blanco 4-m 2013-01-22
General Conditions
Temperature Max: 
18.60
Temperature Min: 
15.70
Humidity Max: 
63
Humidity Min: 
21
Wind Speed Max: 
6.30
Wind Speed Min: 
0.00
Comment: 
None.
1st Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.10
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky : 
0
2nd Quarter
Clouds: 
Clear
Seeing Value: 
0.80
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
3rd Quarter
Clouds: 
Clear
Wind: 
Low
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
ENR CTIO Blanco 4-m 2013-01-21
General Conditions
Comment: 
Monday, January 21, 2013 Telescope: CTIO Blanco 4-m Submitter: Bob Nichol Submitter Email: bob.nichol@port.ac.uk Observer Support: None Night Assistant: Alberto Alvarez Also Present: Hernan Tirado Gerdes, Old, Hoffmann Problems: In afternoon, exposure queue hung with flats with DECam interface saying TCS was unresponsive. Restarting the TCS solved the problem Comments: Bad seeing and thick cloud came in from roughly 00:15 local time. Much of the data was with seeing > 1.5 and had trouble guiding. Monday, January 21, 2013 (second half of night) Telescope: CTIO Blanco 4-m Submitter: Adam Miller Submitter Email: amiller@astro.berkeley.edu Observer Support: None Night Assistant: Alberto Alvarez Also Present: Chris Klein Problems: The beginning of our observations featured thick clouds and poor seeing, however, the tracking issues that affected our images from two nights ago were gone during an initial sequence of images that were 40 s exposures followed by slewing to another field. However, after ~30 images were taken the tracking issues returned (during a sequence of 20 s exposures followed by slewing). After the tracking issues, namely elongation in the images in the RA direction, persisted for ~1 hour, we paused observations and sent the telescope to zenith. We obtained a sequence of test images at zenith which showed no tracking issues. We returned to our field and continued observations - the elongation issues persisted at this point but the amplitude of elongation was significantly improved relative to the previous sequence. It appears that after a moderate slew (anything between 60 and 5 deg) the image quality is significantly better if several images are taken in a single location prior to initializing the observing sequence. This theory should be tested in greater detail. We would also not recommend exposures shorter than 20 s if they are to be immediately followed by slews. Also, the guider GUI was not updating with guiding information (though the guider did appear to be working throughout the night). Somewhat inexplicably at the very end of the night (after twilight started) the guiding GUI started working again. We performed a configure command with the observer console which may have led to this difference.
1st Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.00
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky : 
1
2nd Quarter
Clouds: 
Cirrus
Wind: 
Low
Seeing Value: 
1.50
Seeing Variability: 
0.6
Seeing Source: 
The Telescope I used
Sky: 
5
3rd Quarter
Clouds: 
Partially cloudy
Wind: 
Low
Seeing Value: 
1.50
Seeing Variability: 
0.4
Seeing Source: 
The Telescope I used
Sky: 
6
4th Quarter
Clouds: 
Cirrus
Wind: 
Low
Seeing Value: 
1.50
Seeing Variability: 
0.4
Seeing Source: 
The Telescope I used
Sky: 
4
ENR CTIO Blanco 4-m 2013-01-20
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Overcast
Wind: 
Low
Seeing Value: 
0.00
Seeing Variability: 
0
Seeing Source: 
CTIO Seeing monitor
Sky : 
8
2nd Quarter
Clouds: 
Overcast
Wind: 
Low
Seeing Value: 
0.00
Seeing Variability: 
0
Seeing Source: 
CTIO Seeing monitor
Sky: 
8
3rd Quarter
Clouds: 
Overcast
Precipitation: 
Rain
Wind: 
Medium
Seeing Value: 
0.00
Seeing Variability: 
0
Sky: 
8
4th Quarter
Clouds: 
Overcast
Precipitation: 
High Humidity
Wind: 
Low
Seeing Value: 
0.00
Seeing Variability: 
0
Sky: 
8
ENR CTIO Blanco 4-m 2013-01-19
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Cirrus
Wind: 
Low
Seeing Value: 
1.00
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky : 
3
2nd Quarter
Clouds: 
Cirrus
Wind: 
Low
Seeing Value: 
1.00
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
4
3rd Quarter
Clouds: 
Clear
Seeing Value: 
1.30
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky: 
1
4th Quarter
Clouds: 
Cirrus
Wind: 
Low
Seeing Value: 
0.00
Seeing Variability: 
0
Seeing Source: 
The Telescope I used
Sky: 
3
ENR CTIO Blanco 4-m 2013-01-18
General Conditions
Temperature Max: 
15.00
Temperature Min: 
12.00
Humidity Max: 
95
Humidity Min: 
65
Wind Speed Max: 
9.00
Wind Speed Min: 
1.00
Comment: 
The sky condition is not safe at all to attempt doing any king of observations or tests.
1st Quarter
Clouds: 
Thin Clouds
Wind: 
Medium
Seeing Value: 
0.80
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky : 
3
2nd Quarter
Clouds: 
Thin Clouds
Wind: 
Medium
Seeing Value: 
0.80
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
2
3rd Quarter
Clouds: 
Thin Clouds
Wind: 
Low
Seeing Value: 
1.50
Seeing Variability: 
0.4
Seeing Source: 
The Telescope I used
Sky: 
2
4th Quarter
Clouds: 
Thin Clouds
Wind: 
Medium
Seeing Value: 
1.00
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
2
ENR CTIO Blanco 4-m 2013-01-17
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Clear
Seeing Value: 
0.00
Seeing Variability: 
0
Seeing Source: 
CTIO Seeing monitor
Sky : 
0
2nd Quarter
Clouds: 
Clear
Seeing Value: 
0.00
Seeing Variability: 
0
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
3rd Quarter
Clouds: 
Clear
Seeing Value: 
0.00
Seeing Variability: 
0
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
4th Quarter
Clouds: 
Clear
Seeing Value: 
0.00
Seeing Variability: 
0
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
ENR CTIO Blanco 4-m 2013-01-16
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Clear
Seeing Value: 
0.00
Seeing Variability: 
0
Seeing Source: 
CTIO Seeing monitor
Sky : 
0
2nd Quarter
Clouds: 
Clear
Seeing Value: 
0.00
Seeing Variability: 
0
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
3rd Quarter
Clouds: 
Cirrus
Seeing Value: 
1.50
Seeing Variability: 
0.4
Seeing Source: 
The Telescope I used
Sky: 
2
4th Quarter
Clouds: 
Cirrus
Seeing Value: 
1.25
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
2
ENR CTIO Blanco 4-m 2013-01-15
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Clear
Seeing Value: 
0.00
Seeing Variability: 
0
Seeing Source: 
CTIO Seeing monitor
Sky : 
0
2nd Quarter
Clouds: 
Clear
Seeing Value: 
0.00
Seeing Variability: 
0
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
3rd Quarter
Clouds: 
Clear
Seeing Value: 
1.40
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
4th Quarter
Clouds: 
Clear
Seeing Value: 
1.35
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
ENR CTIO Blanco 4-m 2013-01-14
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Clear
Seeing Value: 
0.00
Seeing Variability: 
0
Seeing Source: 
CTIO Seeing monitor
Sky : 
0
2nd Quarter
Clouds: 
Clear
Seeing Value: 
0.00
Seeing Variability: 
0
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
3rd Quarter
Clouds: 
Clear
Seeing Value: 
1.50
Seeing Variability: 
0.4
Seeing Source: 
The Telescope I used
Sky: 
0
4th Quarter
Clouds: 
Clear
Seeing Value: 
1.50
Seeing Variability: 
0.4
Seeing Source: 
The Telescope I used
Sky: 
0
ENR CTIO Blanco 4-m 2013-01-13
General Conditions
Comment: 
Guis froze and took 30 minutes to restart properly.
1st Quarter
Clouds: 
Clear
Seeing Value: 
0.00
Seeing Variability: 
0
Seeing Source: 
CTIO Seeing monitor
Sky : 
0
2nd Quarter
Clouds: 
Clear
Seeing Value: 
0.00
Seeing Variability: 
0
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
3rd Quarter
Clouds: 
Clear
Seeing Value: 
1.50
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
4th Quarter
Clouds: 
Clear
Seeing Value: 
1.80
Seeing Variability: 
0.6
Seeing Source: 
The Telescope I used
Sky: 
0

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