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ENR CTIO Blanco 4-m 2015-05-24

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Date: 
Sunday, May 24, 2015
Telescope: 
CTIO Blanco 4-m
Submitter: 
Roberto Munoz
Submitter Email: 
rmunoz@astro.puc.cl
Observer Support: 
Kathy Vivas
Night Assistant: 
Alberto Alvarez
Problems: 

We had two problems during the night.

1. At the begging of the night, around UT 22:48, the telescope was slewing to observe the first target of the night. The target was the standard field E6-A at RA=14h45m DEC=-45d15m. The telescope started slewing, but half of the way the emergency brakes activated. The operator and technicians went upstairs to verify the origin of the problem and run several tests. At UT 01:00 we were able to restart the observations.

2.At the end of the night, around UT 9:01, the shutter didn't respond and the exposure was never taken. Alberto noticed that the vacuum of the camera was gone, I stoped the queue and click safe mode. The system became unresponsive and we couldn't turn off the vsub.

Comments: 

The first problem took about 1 hour and 10 min to be solved. The problem was solved and we were able to start observing.

The second problem was also solved and the system was restarted around 10:20 UT.

Conditions: 
General Conditions
Temperature Max: 
10.00
Temperature Min: 
9.00
Humidity Max: 
35
Humidity Min: 
20
Wind Speed Max: 
25.00
Wind Speed Min: 
5.00
Comment: 
There were thick clouds toward the north during all the night. The clouds started moving towards the south and we had thin clouds most of the time on top.
1st Quarter
Clouds: 
Thin Clouds
Wind: 
Low
Seeing Value: 
1.00
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky : 
2
2nd Quarter
Clouds: 
Thin Clouds
Wind: 
Medium
Seeing Value: 
1.20
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky: 
3
3rd Quarter
Clouds: 
Thin Clouds
Wind: 
Medium
Seeing Value: 
1.20
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky: 
4
4th Quarter
Clouds: 
Cirrus
Wind: 
Medium
Seeing Value: 
1.50
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky: 
6
Program: 
Proposal: 
2015A-0234
Target of Oportunity: 
No
Time Observed: 
8.0
Time Engineering: 
0.0
Time lost technical: 
3.0
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
Institution: 
Yale
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
11
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2015-05-24 8.0 0.0 3.0 0.0 0.0 11