Date:
Thursday, December 21, 2017
Telescope:
CTIO Blanco 4-m
Submitter:
Chad Trujillo
Submitter Email:
Observer Support:
Hernan Tirado
Night Assistant:
Claudio Aguilera
Also Present:
Ting Li, Raffaella Capasso
Problems:
Couldn't change to VR filter halfway through night.
Program:
Proposal:
2012B-0001
Target of Oportunity:
No
Time Observed:
3.5
Time Engineering:
0.0
Time lost technical:
0.0
Time lost weather:
0.0
Time lost other:
0.0
Description:
DES
Primary Investigator:
Josh Frieman
Email:
Institution:
Fermilab
Instrument:
CTIO 4m DECam
Total Program Time:
3.5
Proposal:
2017B-0307
Target of Oportunity:
No
Time Observed:
1.5
Time Engineering:
0.0
Time lost technical:
2.5
Time lost weather:
0.0
Time lost other:
0.0
Description:
Extreme TNOs
Primary Investigator:
Scott Sheppard
Institution:
Carnegie Institution of Washington
Instrument:
CTIO 4m DECam
Organization:
NOAO
Total Program Time:
4
| Total Times | Time Observed | Time Engineering | Time lost technical | Time lost weather | Time lost other | Total Program Time |
|---|---|---|---|---|---|---|
| 2017-12-21 | 5.0 | 0.0 | 2.5 | 0.0 | 0.0 | 7.5 |
Printer-friendly version
Couldn't get the VR filter into position at the second half of the night. Had to troubleshoot to get any filter move to go through. Then tried the VR a few more times at zenith, pointed west and pointed north, but couldn't get it to go in. Total time was 1.3 hours troubleshooting. Spent the rest of the night in the r filter after recovery, suffering from factor 2 throughout loss, equivalent to approximately 1.3 hours of telescope time for a total time loss of 2.6 hours.