Date:
Monday, April 24, 2017
Telescope:
CTIO Blanco 4-m
Submitter:
Jeff Carlin
Submitter Email:
Observer Support:
Hernan Tirado
Night Assistant:
Alberto Alvarez
Also Present:
Jeff Carlin (observer)
Problems:
No major problems with the telescope or instrument. Just bad weather.
At 03:40, we had a brief problem where the telescope would not respond to the script that I loaded.
Program:
Proposal:
2017A-0060
Target of Oportunity:
No
Time Observed:
7.25
Time Engineering:
0.0
Time lost technical:
0.0
Time lost weather:
3.25
Time lost other:
0.0
Description:
Dwarfs around Dwarfs: Satellite galaxies and stellar halos around dwarf galaxies
Primary Investigator:
Denija Crnojevic
Email:
Institution:
Texas Tech University
Instrument:
CTIO 4m DECam
Organization:
NOAO
Total Program Time:
10.5
| Total Times | Time Observed | Time Engineering | Time lost technical | Time lost weather | Time lost other | Total Program Time |
|---|---|---|---|---|---|---|
| 2017-04-24 | 7.25 | 0.0 | 0.0 | 3.25 | 0.0 | 10.5 |
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We gathered data from sunset until 11:45 PM, but all the data was taken through clouds. We were able to re-open later, but then observed through clouds for a while until we had to stop again. I report below that only 3.25 hours were lost to weather, because that is the time that we closed the dome or stopped taking exposures. However, it is likely that most of the data we gathered are not useful.
When we had the brief problem at 03:40, we received the following errors:
TCSInterface at 03:40: TCS Error: FAILED: ERROR command TARGETM rejected on state ACTIVE
OCS at 03:40: Interlock DECAM (LATCH) is now broken
_prepareTCS) at 3:40: Not ready
OCS at 03:40: Component(s) not ready for exposure: Aborted
OCS at 03:40: Interlock SISPI (OCS) is now broken
After running "configure" in the System Control menu, things were fine. This was only about 5 minutes, so I did not log it as technical time lost.