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ENR CTIO Blanco 4-m 2012-12-21

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Date: 
Friday, December 21, 2012
Telescope: 
CTIO Blanco 4-m
Submitter: 
Kenneth Patton
Submitter Email: 
patton.161@osu.edu
Observer Support: 
Mauricio Rojas
Night Assistant: 
Leonardo Paredes
Also Present: 
Tom Diehl, Jim Annis
Problems: 

Early on in the night we had one image in SISPI that was labeled with the wrong RA and DEC, exposure 163068.

We had major pointing after we ran a test with some minor offset slews around 11:50 PM.  We attempted to do relative offsets of +10 arcsec RA, -10 arcsec RA, +10 arcsec DEC, -10 arcsec DEC and the image solutions consistent with star locations on the chips indicated the movements did not behave correctly.  Also, with the two DEC offsets the RA of the resulting images ended up shifting by 300 arcsec and 200 arc respectively.  The progression is discussed in elog entries 38428, 38449, 38455, 38461, 38465, 38537.  It took us over an hour to get the pointing back under control- relative and absolute shifts in both SISPI and the TCS controls did not behave as expected.

We lost one of the image builders near the end of the night as it was trying to process an image- the thread crashed due to an unknown error.

Comments: 

None.

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Clear
Seeing Value: 
1.10
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky : 
0
2nd Quarter
Clouds: 
Clear
Seeing Value: 
0.90
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
3rd Quarter
Clouds: 
Clear
Seeing Value: 
1.00
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
4th Quarter
Clouds: 
Clear
Seeing Value: 
1.10
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
Program: 
Proposal: 
2012B-0003
Target of Oportunity: 
No
Time Observed: 
6.25
Time Engineering: 
0.0
Time lost technical: 
1.75
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
SV-Extended
Primary Investigator: 
Frieman
Email: 
frieman@fnal.gov
Institution: 
Fermilab
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
8
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2012-12-21 6.25 0.0 1.75 0.0 0.0 8