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ENR CTIO Blanco 4-m 2015-05-25

Date: 
Monday, May 25, 2015
Telescope: 
CTIO Blanco 4-m
Submitter: 
Roberto Munoz
Submitter Email: 
rmunoz@astro.puc.cl
Observer Support: 
Hernan Tirado
Night Assistant: 
Alberto Alvarez
Problems: 

At 00:16 UT we realized that the guiding system was not properly working. It was applying large offsets of 2 arcseconds and the stars in the final image had ellipticities of 0.3. We asked Alberto and Hernan, and after running several tests they solved the problem. We lost 1 hour trying to solve the guiding problem.

At 3:59 UT the shutter system became unresponsive and it was not possible to take any more images. Even after restarting SISPI the shutter never opened and it wasn't possible to take more images. It seems the cause was clicking pause button and then stop. The problem was solved after running several tests and clicking pause and then resume.

Comments: 

None.

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Thin Clouds
Wind: 
Medium
Seeing Value: 
1.60
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky : 
4
2nd Quarter
Clouds: 
Thin Clouds
Wind: 
Low
Seeing Value: 
1.30
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
2
3rd Quarter
Clouds: 
Cirrus
Wind: 
Medium
Seeing Value: 
1.60
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
4
4th Quarter
Clouds: 
Cirrus
Wind: 
High
Seeing Value: 
2.00
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
6
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Program: 
Proposal: 
2015A-0234
Target of Oportunity: 
No
Time Observed: 
9.5
Time Engineering: 
0.0
Time lost technical: 
2.0
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
An abridged tail: Mapping the Palomar 5 tidal stream with DECam
Primary Investigator: 
Marla Geha
Email: 
marla.geha@yale.edu [1]
Institution: 
Yale
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
11.5
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2015-05-25 9.5 0.0 2.0 0.0 0.0 11.5
Source URL (modified on 05/26/2015 - 07:27): http://www.ctio.noao.edu/noao/node/7821

Links
[1] mailto:marla.geha@yale.edu
[2] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/2382/delete?destination=print/content/enr-ctio-blanco-4-m-2015-05-25
[3] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/2382/edit?destination=print/content/enr-ctio-blanco-4-m-2015-05-25
[4] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/add/node/7821?destination=print/content/enr-ctio-blanco-4-m-2015-05-25