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ENR CTIO Blanco 4-m 2014-02-09

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Date: 
Sunday, February 9, 2014
Telescope: 
CTIO Blanco 4-m
Submitter: 
Stephen Kent (1st half) Claudia Belardi (2nd half)
Submitter Email: 
belardiclaudia@gmail.com
Observer Support: 
Humberto Orrego
Night Assistant: 
Hernan Tirado
Also Present: 
Alex Drlica-Wagner
Problems: 

Spike in FCM humidity around 04:00 UT.  Up to 6% triggered - several alarms.  Outside humidity was 44%, wind 7 mph.  We did not raise the windscreen.  The humidity dropped down on its own.

second half: none

Comments: 

---- DES ----
Observing Team

 

DES Observers: Steve Kent, Alex Drlica-Wagner
Telops: Humberto Orrego, Hernan Tirado
Remote Support: Klaus (testing pscjob)

Observing Plan

Half-night plan

  1. standard bias and dome flat sequence
  2. evening standard stars
  3. Nightly defocus
  4. run ObsTac queue
  5. middle of the night standard star
  6. handover to community observers
  7. Head down mountain in morning

 

Conditions

  1. weather after dinner: 7pm (local): Clear
  2. weather during night: 22:00 pm (local): Clear
  3. weather during night: 12am (local): Clear
  4. Seeing conditions: 1.7 arcsec at start. Settling down to 1 arcsec, then the expected 0.7-0.8 arcsec after 2:30 UT
  5. Wind conditions: 5 mph
  6. Humidity: 50

Accomplishments

 

  1. Afternoon: zeros, dome flats (ugriz)
  2. Early evening test of pscjob
  3. Evening: Standards:

    • SDSSJ0843 (focus not good initially)
    • SDSSJ0200
    • C26202/HST
  4. Nightly defocus
  5. SN exposures

    • SN-X1
    • SN-C2 (Picked due to seeing trigger)
  6. Survey Exposures: 122 in total
  7. Middle of night:

    • Standard SDSSJ1227



Problems tagged as Synopsis_Problem

 

Several humidity alarms (FCM humidity > 5%) even though wind is low, outside humidity is low. FCM humidity dropped on its own.

Minor Problems and Relevant Information

  1. Occlusion alarms: 3
  2. Shutter errors: 0
  3. Multiple instances of the following alarms from IB:

    • Check for completion thread exiting
    • Image builder thread exiting



Apparently this was Klaus restarting the image builders to get pscjob to work (which it did – yes!). Operations were unaffected.

 

Notes for Data Management

  1. Ignore exposure 283703 (afternoon test)
  2. Ignore exposures 283722-283723 (nightly defocus)

----- END DES -----

Second Half:  increased exposure time to 90s to reach optimum seeing

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Clear
Seeing Value: 
1.10
Seeing Variability: 
0.4
Seeing Source: 
The Telescope I used
Sky : 
0
2nd Quarter
Clouds: 
Clear
Seeing Value: 
0.80
Seeing Variability: 
0
Seeing Source: 
The Telescope I used
Sky: 
0
3rd Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
0.90
Seeing Variability: 
0
Seeing Source: 
The Telescope I used
Sky: 
0
4th Quarter
Clouds: 
Clear
Wind: 
Medium
Seeing Value: 
1.30
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
Program: 
Proposal: 
DES
Target of Oportunity: 
No
Time Observed: 
4.5
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
Dark Energy Survey
Primary Investigator: 
Josh Frieman
Email: 
frieman@fnal.gov
Instrument: 
CTIO 4m DECam
Organization: 
N/A
Total Program Time: 
4.5
Proposal: 
2014A-0073
Target of Oportunity: 
No
Time Observed: 
4.0
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
PAW (Planets Around White Dwarfs)
Primary Investigator: 
Mukremin Kilic
Email: 
kilic@ou.edu
Institution: 
University of Oklahoma
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
2014-02-09 8.5 0.0 0.0 0.0 0.0 8.5