Date:
Monday, August 29, 2016
Telescope:
CTIO Blanco 4-m
Submitter:
Blair Conn
Submitter Email:
Observer Support:
Alfredo Zenteno
Night Assistant:
Hernan Tirado
Also Present:
Federica Tarsitano, Anthony Kremin
Problems:
None.
Program:
Proposal:
2016B-0905
Target of Oportunity:
No
Time Observed:
5.25
Time Engineering:
0.0
Time lost technical:
0.25
Time lost weather:
0.0
Time lost other:
0.0
Description:
Australian Time
Primary Investigator:
Helmut Jerjen
Email:
Institution:
ANU
Instrument:
CTIO 4m DECam
Organization:
N/A
Total Program Time:
5.5
Proposal:
2012B-0001
Target of Oportunity:
No
Time Observed:
5.0
Time Engineering:
0.0
Time lost technical:
0.25
Time lost weather:
0.0
Time lost other:
0.0
Description:
DES
Primary Investigator:
Frieman
Email:
Institution:
DES
Instrument:
CTIO 4m DECam
Organization:
NOAO
Total Program Time:
5.25
| Total Times | Time Observed | Time Engineering | Time lost technical | Time lost weather | Time lost other | Total Program Time |
|---|---|---|---|---|---|---|
| 2016-08-29 | 10.25 | 0.0 | 0.5 | 0.0 | 0.0 | 10.75 |
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First Half:
The center command is not finding a solution. If I overlay the catalog UCAC3 on both the N4 and S4 the offset is up and to the left on the N4 and up and to the right on the S4. Center is complaining the two solutions do not match so it will not calculate an offset. The images otherwise look fine and the seeing is good.
This issue with the seeing went on for a while then eventually it managed to determine the solution again and the offset went almost to zero. We did check the pointing manually by overplotting a catalog in DS9 and it seemed ok.
The one thing we noticed is that the offset seemed to increase whenever we did a large offset, to the point that it went out as far as 40".
Second Half:
Started with large offset ra: 140" dec: 10", but following a correction there was not further problems.
For more, see the night report here: http://des-ops.fnal.gov:8080/nightsum/nightsum-2016-08-29/nightsum.html