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CTIO Home > ENR CTIO Blanco 4-m 2014-06-20

ENR CTIO Blanco 4-m 2014-06-20

Date: 
Friday, June 20, 2014
Telescope: 
CTIO Blanco 4-m
Submitter: 
Will Clarkson
Submitter Email: 
wiclarks@umich.edu
Observer Support: 
David Rojas
Night Assistant: 
Alberto Alvarez
Also Present: 
Kathy Vivas
Problems: 

1. TCS Interface problem:
23:52:47 UT, the following warnings were seen:
WARNING: These components are not ready for exposure: TCSINTERFACE
WARNING: Interlock SISPI (OCS) is now broken
WARNING: Interlock DECAM (SISPI) is now broken

Telescope operator restarted TCS and SISPI was reset in the observer interface. Smooth operation until problem #2 below:

2.About  09:45 UT: TCS failed again (this time without an alarm or warning on the Observer console; was caught by the Telescope Operator). Observers stopped the queue while telescope operator investigated and corrected the error. An image was being executed at that time, got frozen and then it suddenly finished, leading to image 327630 apparently exposing while the telescope was moving (leading to visible trails on image 327630).

Only after exposure 327630 had started did the Observer console report an error, but only about the guiding (continuous null centroid limits exceeded). 
Queue was restarted after that incident with no further problems.

Comments: 

None.

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Partially cloudy
Wind: 
Low
Seeing Value: 
1.30
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky : 
6
2nd Quarter
Clouds: 
Partially cloudy
Wind: 
Low
Seeing Value: 
0.90
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
4
3rd Quarter
Clouds: 
Partially cloudy
Wind: 
Medium
Seeing Value: 
0.90
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
3
4th Quarter
Clouds: 
Partially cloudy
Wind: 
Low
Seeing Value: 
1.00
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
2
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Program: 
Proposal: 
2014A-0480
Target of Oportunity: 
No
Time Observed: 
11.5
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
Blanco DECam Bulge Survey
Primary Investigator: 
R. Michael Rich
Email: 
rmr@astro.ucla.edu [1]
Institution: 
UCLA
Instrument: 
CTIO 4m DECam
Total Program Time: 
11.5
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2014-06-20 11.5 0.0 0.0 0.0 0.0 11.5
Source URL (modified on 06/21/2014 - 06:37): http://www.ctio.noao.edu/noao/content/ENR-CTIO-Blanco-4-m-2014-06-20

Links
[1] mailto:rmr@astro.ucla.edu
[2] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/1606/delete?destination=print/node/5839
[3] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/1606/edit?destination=print/node/5839
[4] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/add/node/5839?destination=print/node/5839