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CTIO Home > ENR CTIO Blanco 4-m 2013-04-17

ENR CTIO Blanco 4-m 2013-04-17

Date: 
Wednesday, April 17, 2013
Telescope: 
CTIO Blanco 4-m
Submitter: 
David Herrera
Submitter Email: 
herrera@noao.edu
Observer Support: 
Hernan Tirado
Night Assistant: 
Alberto Alvarez
Also Present: 
C. Fuentes, J. Rajagopal , A. Earle
Problems: 

Seeing started bad, got better, then was alternating 1.4" down to 0.9" 

Around 12:30, an error on the "Alarm History" log was brought to our attention by D.James about the temperature of the mirror being slightly high (33C)

Around 2:40 we started having a INTERLOCK_LATCH "broken" we reset from System Control, went on for few more exposures and got it back, reset it again. 

The system was warning that one of the crates temperature was 34 whereas the limit for these interlocks alarms to go off is 30, but it has been steady at 34 for a while.

The error came back with the MONSOON "CRITICAL" error (that sounds like scary laser beam).

This time we clicked CONFIGURE instead of RESET, and things went good for a little bit.

Interlocks came back again. Alberto called support and Javier Rojas came to check the crates, and they managed to disable this particular alarm to make SISPI able to keep working (as long as crate temp don't increases much)

We restarted observations without any major incident through the rest of the night

J. Rojas asked us to skip end of run dflats and shutdown SISPI, so we did

Comments: 

None.

Conditions: 
General Conditions
Temperature Max: 
17.30
Temperature Min: 
16.90
Humidity Max: 
17
Humidity Min: 
10
Wind Speed Max: 
22.70
Wind Speed Min: 
6.00
Comment: 
None.
1st Quarter
Clouds: 
Clear
Wind: 
High
Seeing Value: 
1.20
Seeing Variability: 
0
Seeing Source: 
The Telescope I used
Sky : 
0
2nd Quarter
Clouds: 
Clear
Wind: 
Medium
Seeing Value: 
0.90
Seeing Variability: 
0
Seeing Source: 
The Telescope I used
Sky: 
0
3rd Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.20
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
4th Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.20
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
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Program: 
Proposal: 
2013A-0724
Target of Oportunity: 
No
Time Observed: 
8.5
Time Engineering: 
0.0
Time lost technical: 
2.5
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
NEO
Primary Investigator: 
Lori Allen
Email: 
lallen@noao.edu [1]
Institution: 
NOAO
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
2013-04-17 8.5 0.0 2.5 0.0 0.0 11
Source URL (modified on 04/18/2013 - 07:06): http://www.ctio.noao.edu/noao/node/3498

Links
[1] mailto:lallen@noao.edu
[2] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/861/delete?destination=print/content/enr-ctio-blanco-4-m-2013-04-17
[3] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/861/edit?destination=print/content/enr-ctio-blanco-4-m-2013-04-17
[4] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/add/node/3498?destination=print/content/enr-ctio-blanco-4-m-2013-04-17