Date:
Friday, February 16, 2018
Telescope:
CTIO Blanco 4-m
Submitter:
Nathan Golovich
Submitter Email:
Observer Support:
Clara Martinez-Vazquez
Night Assistant:
Claudio Aguilera
Also Present:
William Dawson
Problems:
Humidity alarm occurred continuously with humidity ranging between 5 and 6%. Windows were closed but it failed to lower the humidity in the dome. This occurred after a weather front pushed through that brought some light clouds.
The browsers were all pretty slow all night, but especially when we were doing frequent short (<15 second) exposures. It seemed to slow down the observer console.
Program:
Proposal:
2018A-0273
Target of Oportunity:
No
Time Observed:
9.5
Time Engineering:
0.0
Time lost technical:
0.0
Time lost weather:
2.0
Time lost other:
0.0
Description:
A photometric gravitation microlensing survey of the Bulge, LMC, and SMC in search of intermediate mass black holes.
Primary Investigator:
William Dawson
Email:
Institution:
Lawrence Livermore National Lab
Instrument:
CTIO 4m DECam
Organization:
NOAO
Total Program Time:
11.5
| Total Times | Time Observed | Time Engineering | Time lost technical | Time lost weather | Time lost other | Total Program Time |
|---|---|---|---|---|---|---|
| 2018-02-16 | 9.5 | 0.0 | 0.0 | 2.0 | 0.0 | 11.5 |
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Clouds brought bad seeing -- even after they left -- which got as bad as ~2.5" and stayed above ~1.5" for the rest of the night.
We had three hours of very good seeing and conditions before the clouds pushed through and greatly obscurred our target for about 45-60 minutes. We kept observing because we could see stars still, but the PSF and depth were greatly effected. The clouds went away for about two hours but the seeing stayed bad. Then the clouds returned (much thinner this time) for the final two hours of the night.
We observed our targets as planned despite the clouds. We expect about 10-20% of the night to be a loss though.