Date:
Saturday, November 26, 2022
Telescope:
CTIO Blanco 4-m
Submitter:
Nicole Firestone
Submitter Email:
Observer Support:
Claudio Aguilera
Night Assistant:
Manuel Hernandez
Also Present:
Barbara Benda
Problems:
Higher than expected ellipticity and seeing values in begining of night; loss of guide stars in one exposure (aborted)
Program:
Proposal:
2020B-0201
Target of Oportunity:
No
Time Observed:
6.75
Time Engineering:
0.0
Time lost technical:
0.5
Time lost weather:
0.0
Time lost other:
0.0
Description:
A 100 Deg^2 DECam Narrow-band Survey for the LSST Era: Tracing the Largest Cosmic Structures in the Distant Universe
Primary Investigator:
Soo Lee
Email:
Institution:
Purdue University
Instrument:
CTIO 4m DECam
Organization:
N/A
Total Program Time:
7.25
| Total Times | Time Observed | Time Engineering | Time lost technical | Time lost weather | Time lost other | Total Program Time |
|---|---|---|---|---|---|---|
| 2022-11-26 | 6.75 | 0.0 | 0.5 | 0.0 | 0.0 | 7.25 |
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We experienced an issue where our ellipticity values became higher than expected and our seeing was much higher than we would expect based on the DIMM seeing. We suspected this may be related to the hexapod, so we took multiple short exposures in r-band and our narrowband N501 at zenith. The ellipticity and seeing values remained more reasonable thereafter.
We also had to abort one exposure due to the loss of all guide stars.