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ENR CTIO Blanco 4-m 2013-08-04

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Date: 
Sunday, August 4, 2013
Telescope: 
CTIO Blanco 4-m
Submitter: 
Robert Blum
Submitter Email: 
rblum@noao.edu
Observer Support: 
Alberto Alvarez
Night Assistant: 
Leonardo Paredes
Also Present: 
M Rojas
Problems: 

Editing the night report by multiple people can result in losing data. Save first (and often) and then exit edit mode seems to work ok.

TASCA images take so long to load! Other web pages like soar.org are also VERY slow to load. Something is not as it should be. 

We had an interlock error after image 515 and before 516 (30 sec r band setup image and 100 sec r band science image). Infact, 516 is an empty image and the sequence began again properly with 517. The interlock was cleared with a simple reset on the system control. However, we were not clear on what happened. The original error was a "digitizing error." Error number 2413 on Alarm history page. 

Comments: 

With B. Frye and C. Kaleida.

We note Y overscan warning on image health display for dome flats. See 398 r-Band for example. There is a non linear ramp in counts in the overscan.

Seeing pretty good first part of the night.

Guiding tricky in Bulge at times. We changed the search and isolation parameters per web page. We also reduced the exposure time to 300 ms. 

¡MUY RICA LAS EMPANADAS!

A smooth night. Temperature was steady and even increased slightly toward the end of the night. 

LN2 tank was filled before 7 pm and we did not fill until done observing at end of night (Alistair kindly gave us a heads up based on watching telemetry that we would have plenty of LN2 to last until dawn).

Conditions: 
General Conditions
Temperature Max: 
13.90
Temperature Min: 
11.80
Humidity Max: 
30
Humidity Min: 
20
Wind Speed Max: 
9.50
Wind Speed Min: 
1.00
Comment: 
A few very thin clouds at sunset. Cleared up and was mostly clear all night.
1st Quarter
Clouds: 
Thin Clouds
Seeing Value: 
1.00
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky : 
2
2nd Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.00
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
3rd Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.10
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
4th Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.30
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
Program: 
Proposal: 
2013A-0719
Target of Oportunity: 
yes
Time Observed: 
10.75
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
Synoptic survey of Bulge
Primary Investigator: 
A. Saha
Email: 
asaha@noao.edu
Institution: 
NOAO
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
10.75
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2013-08-04 10.75 0.0 0.0 0.0 0.0 10.75