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ENR CTIO Blanco 4-m 2013-04-27

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Date: 
Saturday, April 27, 2013
Telescope: 
CTIO Blanco 4-m
Submitter: 
Jacqueline McCleary
Submitter Email: 
Jacqueline_McCleary@brown.edu
Observer Support: 
Mauricio Rojas
Night Assistant: 
Alberto Alvarez
Also Present: 
Humberto Orrego,Mauricio Rojas,David Rojas, Omar Estay from LS
Problems: 

At 10:20 pm Chilean Daylight Savings time, the SISPI interlock became unresponsive. The usual restart/configure troubleshoot steps didn't resolve the problem. Eventually Mauricio Rojas, Alberto Alvarez, Humberto Orrego, Mauricio Rojas, David Rojas were all present. They tried to fix the problem on the telescope operator's machine by rebooting the TCS machine, but that didn't resolve the problem either.  Calling Omar Estay in La Serena for troubleshooting help. It became apparent that Observer1 was not communicating properly with the Observer Support machine ("TCSINTERFACE for next exposure returned: FAILED"), and moreover that the problem was on the Observer Support machine. After rebooting the TCS Application machine, the problem was resolved and observations recommenced at around 12:00 midnight Chilean Standard Time. 

Comments: 

None.

Conditions: 
General Conditions
Temperature Max: 
8.40
Temperature Min: 
7.80
Humidity Max: 
32
Humidity Min: 
27
Wind Speed Max: 
25.00
Wind Speed Min: 
5.00
Comment: 
The seeing for the night started at 2.7" or so and over the course of the night dropped to 1.2-1.3", with brief extremes higher (3")or lower (1.1"). Note 1" seeing or better is required for weak lensing analysis. The night started out photometric, but clouds rapidly covered sky starting at 3:40 am Chilean standard time. By 4:15 am Cloud cover extended horizon to horizon and shows no signs of clearing before twilight, so dome was closed for the night.
1st Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
2.00
Seeing Variability: 
0.2
Seeing Source: 
Other
Sky : 
0
2nd Quarter
Clouds: 
Clear
Wind: 
Medium
Seeing Value: 
1.80
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
3rd Quarter
Clouds: 
Partially cloudy
Wind: 
High
Seeing Value: 
1.50
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
7
4th Quarter
Clouds: 
Partially cloudy
Seeing Value: 
0.00
Seeing Variability: 
0
Seeing Source: 
The Telescope I used
Sky: 
7
Program: 
Proposal: 
2013A-0717
Target of Oportunity: 
No
Time Observed: 
5.5
Time Engineering: 
0.0
Time lost technical: 
3.0
Time lost weather: 
2.0
Time lost other: 
0.0
Description: 
Weak Lensing of Low-Redshift Clusters and Large Scale Structures
Primary Investigator: 
Ian dell'Antonio
Email: 
ian_dell'antonio@brown.edu
Institution: 
Brown University
Instrument: 
CTIO 4m DECam
Organization: 
DD
Total Program Time: 
10.5
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2013-04-27 5.5 0.0 3.0 2.0 0.0 10.5