Date:
Thursday, September 21, 2023
Telescope:
CTIO Blanco 4-m
Submitter:
Alfredo Zenteno
Submitter Email:
Observer Support:
Hernan Tirado
Night Assistant:
Jackie Seron
Also Present:
Roberto Aviles
Problems:
None.
Program:
Proposal:
2023B-725434
Target of Oportunity:
No
Time Observed:
7.0
Time Engineering:
0.0
Time lost technical:
1.0
Time lost weather:
2.0
Time lost other:
0.0
Description:
Wide-field observation of Abell 2744: galaxy pre-processing in a dynamically young cluster of galaxies
Primary Investigator:
Ricardo Demarco
Email:
Institution:
Universidad de Concepcion
Instrument:
CTIO 4m DECam
Organization:
Chile
Total Program Time:
10
| Total Times | Time Observed | Time Engineering | Time lost technical | Time lost weather | Time lost other | Total Program Time |
|---|---|---|---|---|---|---|
| 2023-09-21 | 7.0 | 0.0 | 1.0 | 2.0 | 0.0 | 10 |
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Partly successful night. Started well but the dome had to be closed due to clouds around 7:00 UT. Observations from ~6:20 UT on affected by clouds. About two hours lost to clouds. About 15 mins lost at the beginning of the night (~0:15 UT) due to tracking issues. Problem with Hexapod suspected. Hexapod was restarted but that did not solve the problem. Tweaks values of 4map reading zero. A reset of 4map fixed the problem. Two consecutive issues with Hexapod affected the observations at around 6:16 UT. About a quarter of an hour is affected by this. In total, observations in z, i, r and g (according to sky brightness due to the Moon) were conducted. Seeing varied across the night between 1.5” and 1.1”.