Date:
Tuesday, August 13, 2013
Telescope:
CTIO Blanco 4-m
Submitter:
Chris Lidman
Submitter Email:
Observer Support:
Alistair Walker
Night Assistant:
Claudio Aguilera
Problems:
None.
Program:
Proposal:
2013B-0616
Target of Oportunity:
No
Time Observed:
10.75
Time Engineering:
0.0
Time lost technical:
0.0
Time lost weather:
0.0
Time lost other:
0.0
Description:
Galaxy clusters in the XXL south field
Primary Investigator:
Chris Lidman
Email:
Institution:
AAO
Instrument:
CTIO 4m DECam
Organization:
N/A
Total Program Time:
10.75
| Total Times | Time Observed | Time Engineering | Time lost technical | Time lost weather | Time lost other | Total Program Time |
|---|---|---|---|---|---|---|
| 2013-08-13 | 10.75 | 0.0 | 0.0 | 0.0 | 0.0 | 10.75 |
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07:10 UT
The DIMM reports 0.6" seeing, yet we do no better than 1.1" in the z-band with DECam.
The system does not appear to have any problems, and stars appear to be in focus in the DECam images.
AOS plots on the telemetry viewerare updating. Presumably, it is working.
07:30 UT
Openned the lateral louvers to 20% open, even thought the wind is at 15 mph. (We had closed them earlier as the wind had reached 25mph).
Image quality improved steadily during subsequent exposures, from 1.3, to 1.17, 1.11, 1.05, 1.03 and then 0.99. The reported DIMM measurement did not change.
In fact, it increased slightly.
08:00 UT
Openned the lateral louvers all the way. Windscreen were always down during the night. Image quality stayed around 1. Still quite a bit poorer
than the DIMM at 0.5. All exposures were in the z-band.