Date:
Wednesday, October 19, 2016
Telescope:
CTIO Blanco 4-m
Submitter:
Christopher Conselice
Submitter Email:
Observer Support:
Manuel Hernandez
Night Assistant:
Carlos Corco
Also Present:
Youngsoo Park, Ross Cawthon
Problems:
We have a problem at around 10pm whereby the guiding failed, although there were no clouds and images were showing a good depth was being reached. Those images from 4063 to 4073 are however defective as they show elongation and in some cases look out of focus. To fix this we turned off the tweaks from 4map and thing started to improve at that point staring with frame 4074. Also cleared the tweaks buffer which was full and then reconnected it. We put the tweaks back on at frame 4095 and operations continued as normal with good image quality.
Program:
Proposal:
2012B-0001
Target of Oportunity:
No
Time Observed:
7.5
Time Engineering:
0.0
Time lost technical:
0.25
Time lost weather:
0.0
Time lost other:
0.0
Description:
DES
Primary Investigator:
Frieman
Email:
Institution:
Fermilab
Instrument:
CTIO 4m DECam
Organization:
Chile
Total Program Time:
7.75
| Total Times | Time Observed | Time Engineering | Time lost technical | Time lost weather | Time lost other | Total Program Time |
|---|---|---|---|---|---|---|
| 2016-10-19 | 7.5 | 0.0 | 0.25 | 0.0 | 0.0 | 7.75 |
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Night began with some clouds. Bad seeing at the start, from 2.5-3". Seeing improved at around 9:40pm to around 2". Cloud cover compromised some data starting at 9:55pm, but seeing stayed around 2". More cloud cover at 11:15pm when we moved to SN field SN-X2. Very cloudy at around 11:45 (images near 584109). After about 1:30 was still semi-cloudy with high cirrus most likely but good seeing of around 1.2 arcsec. Stayed stable at this condition for rest of night.