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ENR CTIO Blanco 4-m 2014-06-25

Date: 
Wednesday, June 25, 2014
Telescope: 
CTIO Blanco 4-m
Submitter: 
Thiago S Goncalves
Submitter Email: 
tsg@astro.ufrj.br
Observer Support: 
Catherine Kaleida
Night Assistant: 
None
Also Present: 
Joao Paulo Nogueira-Cavalcante
Problems: 

Around 0:00 UT we noticed that seeing in the images was much higer than DIMM - between 1.0 and 1.5 arcsec depending on observed filter versus ~0.5 arcsec. That was the case even for the r band, earlier in the night. Nothing seemed wrong with the system, apparently it was simply caused by weather.

DIMM camera stopped sending seeing data around 1:00 UT, until ~3:00 UT.

Comments: 

Thick clouds came in around 4:00 UT. Number counts fell more than 50%. No clouds between 6:30UT and 9:00UT, when another thick wave came in.

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Thin Clouds
Wind: 
Low
Seeing Value: 
1.30
Seeing Variability: 
0.4
Seeing Source: 
The Telescope I used
Sky : 
1
2nd Quarter
Clouds: 
Thin Clouds
Wind: 
Low
Seeing Value: 
1.10
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
1
3rd Quarter
Clouds: 
Partially cloudy
Wind: 
Low
Seeing Value: 
1.50
Seeing Variability: 
0.4
Seeing Source: 
The Telescope I used
Sky: 
7
4th Quarter
Clouds: 
Partially cloudy
Seeing Value: 
1.60
Seeing Variability: 
0.4
Seeing Source: 
The Telescope I used
Sky: 
4
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Program: 
Proposal: 
0632
Target of Oportunity: 
No
Time Observed: 
11.5
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
3.5
Time lost other: 
0.0
Primary Investigator: 
Thiago S Goncalves
Institution: 
Observatorio do Valongo
Instrument: 
CTIO 4m DECam
Organization: 
Brazil
Total Program Time: 
15
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2014-06-25 11.5 0.0 0.0 3.5 0.0 15
Source URL (modified on 06/26/2014 - 06:51): http://www.ctio.noao.edu/noao/node/5860

Links
[1] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/1617/delete?destination=print/content/enr-ctio-blanco-4-m-2014-06-25
[2] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/1617/edit?destination=print/content/enr-ctio-blanco-4-m-2014-06-25
[3] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/add/node/5860?destination=print/content/enr-ctio-blanco-4-m-2014-06-25