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CTIO Home > ENR CTIO Blanco 4-m 2013-03-18

ENR CTIO Blanco 4-m 2013-03-18

Date: 
Monday, March 18, 2013
Telescope: 
CTIO Blanco 4-m
Submitter: 
Ricardo Munoz
Submitter Email: 
rmunoz@das.uchile.cl
Observer Support: 
Hernan Tirado
Night Assistant: 
Alberto Alvarez
Also Present: 
Ricardo Muñoz, Andrea Kunder
Problems: 

We had bad weather at the beginning of the night. During the second half of the night we had problems with the guider. It would suddenly stop guiding. After pausing and resuming the exposure it would restart again. Toward the end of the night though, it just stopped working completely.

We got the following alarms when the guider stopped: "GUIDER GUIDER continnous null" and "GUIDER GUIDER no active CCDs". 

Comments: 

Seeing got progressively worse during the night. Also, the ellipticity values got higher and close to 0.2 during the second half of the night. In some frames it looked like the telescope had jumped judging by the appearance of the stars.

Conditions: 
General Conditions
Temperature Max: 
12.00
Temperature Min: 
10.30
Humidity Max: 
40
Humidity Min: 
25
Wind Speed Max: 
11.00
Wind Speed Min: 
1.50
Comment: 
None.
1st Quarter
Clouds: 
Partially cloudy
Wind: 
Low
Seeing Value: 
1.40
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky : 
6
2nd Quarter
Clouds: 
Cirrus
Wind: 
Medium
Seeing Value: 
0.80
Seeing Variability: 
0.4
Seeing Source: 
The Telescope I used
Sky: 
3
3rd Quarter
Clouds: 
Clear
Wind: 
Medium
Seeing Value: 
1.40
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
4th Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.60
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
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Program: 
Proposal: 
0411
Target of Oportunity: 
No
Time Observed: 
6.0
Time Engineering: 
0.0
Time lost technical: 
0.75
Time lost weather: 
2.75
Time lost other: 
0.0
Primary Investigator: 
David Nidever
Institution: 
U. Michigan
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
9.5
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2013-03-18 6.0 0.0 0.75 2.75 0.0 9.5
Source URL (modified on 03/19/2013 - 06:44): http://www.ctio.noao.edu/noao/node/3355

Links
[1] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/792/delete?destination=print/content/enr-ctio-blanco-4-m-2013-03-18
[2] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/792/edit?destination=print/content/enr-ctio-blanco-4-m-2013-03-18
[3] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/add/node/3355?destination=print/content/enr-ctio-blanco-4-m-2013-03-18