Date:
Friday, August 31, 2018
Telescope:
CTIO Blanco 4-m
Submitter:
Eddie Schlafly
Submitter Email:
Observer Support:
Hernan Tirado
Night Assistant:
Claudio Aguilera
Also Present:
Arjun Dey
Problems:
None, other than the poor weather at start of the night, and then the poor seeing for most of the night.
Program:
Proposal:
2014B-0404
Target of Oportunity:
No
Time Observed:
7.5
Time Engineering:
0.0
Time lost technical:
0.0
Time lost weather:
2.75
Time lost other:
0.0
Description:
DECam Legacy Survey
Primary Investigator:
David Schlegel
Email:
Institution:
Lawrence Berkeley National Laboratory
Instrument:
CTIO 4m DECam
Organization:
NOAO
Total Program Time:
10.25
| Total Times | Time Observed | Time Engineering | Time lost technical | Time lost weather | Time lost other | Total Program Time |
|---|---|---|---|---|---|---|
| 2018-08-31 | 7.5 | 0.0 | 0.0 | 2.75 | 0.0 | 10.25 |
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Closed for the first ~2.5 hours. Poor seeing after opening, though around 3:30 UT seeing dropped under 2". Hopefully the weather improves in the coming week!
Arjun took over from Eddie at ~UT 05:00.
Skies progressively improved, but the seeing only improved from abysmal to poor (3" to ~1.3" at best). The mirror was about 1.5-2C warmer than the ambient air (accdg to the SISPI plots of lowdome and PMAS temps). Otherwise, a smooth night, with a few hours of photometric weather at the end of the night. Excellent help from Claudio, who also braved the elements to observe the skies for his remote observers.