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ENR CTIO Blanco 4-m 2015-09-29

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Date: 
Tuesday, September 29, 2015
Telescope: 
CTIO Blanco 4-m
Submitter: 
David James
Submitter Email: 
djj@ctio.noao.edu
Observer Support: 
Hernan Tirado
Night Assistant: 
Alberto Alvarez
Also Present: 
Tie, Furlanetto
Problems: 

4MAP failure @22:04 local, and the TCS interface also failed … about 15-minutes lost.

Just as I was about to turn over to DES observing for a few hours, we’ve lost communication between the TCS and dome control application —> lost at 04:20 local.

okay, after about 30-minutes of analysis, it looks like a dome encoder problem, which given there is just over one hour’s worth of observing left, and the problem would not likely be fixed in time to carry on, I’m therefore closing up. ETS/day crew please investigate the dome problem.

(thanks, DJJ)

Comments: 

Observing Plan for the Engineering Night

  1. High resolution out-of-focus donuts program completed (2013A-9999): AOS dense dithers
  2. Community script (2015A-0322) for Kathy Vivas: four visits
  3. Two Kuiper belt objects observed on two epochs (2013A-9999) for David Gerdes (Umich, DES-TNO group)
  4. Two Neptune fields observed for my program with Eric Mamajek (2013B-0531)
  5. Middle of night standard stars (2013A-9999) bracketing CalSpec standard fields observed: SDSSJ2300-0000, C26202/HST, SDSSJ2140-0000 and SDSSJ0100-0000
  6. CalSpec standard fields LDS9498B and Feige110 observed (2013A-9999)
  7. Community program KEGS (2015B-0314) executed for about two hours …
  8. About to switch over to DES observing when the dome encoder problem occurred.

Conditions

Very light cirrus at sunset overhead, W/SW/S/SE/E clearing to the South. Rasicam was clear vast majority of the night.. Light cirrus between 03:15 and 04:15.  Except for a brief blow-up near to 04:30 UT, DIQ seeing was about 1" or better. 

Accomplishments

Several engineering tasks performed (donuts, Calspec standards acquired), as well as a few community programs observed.

 

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Cirrus
Wind: 
Low
Seeing Value: 
1.20
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky : 
3
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
Seeing Value: 
1.00
Seeing Variability: 
0.4
Seeing Source: 
The Telescope I used
Sky: 
0
4th Quarter
Clouds: 
Cirrus
Wind: 
Low
Seeing Value: 
0.90
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
1
Program: 
Proposal: 
2013A-9999
Target of Oportunity: 
No
Time Observed: 
0.0
Time Engineering: 
8.0
Time lost technical: 
2.0
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
Decam Engineering
Primary Investigator: 
Alistair Walker
Email: 
awalker@ctio.noao.edu
Institution: 
CTIO
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
10
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2015-09-29 0.0 8.0 2.0 0.0 0.0 10