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ENR CTIO Blanco 4-m 2016-02-10

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Date: 
Wednesday, February 10, 2016
Telescope: 
CTIO Blanco 4-m
Submitter: 
Alex Drlica-Wagner
Submitter Email: 
kadrlica@fnal.gov
Observer Support: 
Claudio Aguilera
Night Assistant: 
Manuel Hernandez
Also Present: 
Andres Plazas, Keith Bechtol, Alistair Walker
Problems: 

Dome occlusion alert at ~08:37 UTC signaled that the dome had stopped moving. After investigation, it was found that the dome encoders were not controllable by the GUI. This ended observations ~40 minutes before morning standards (standards could not be taken).

Comments: 

DECamObserver (02/11/2016 05:12:58)

Observing Team

DES Observers: Alex Drlica-Wagner, Andres Plazas
Telops: Manuel Hernandez, Claudio Aguilera
Remote Support: Klaus is everywhere
Also Present: Keith Bechtol, Alistair Walker

Observing Plan

  1. Afternoon calibrations (back to the usual; no new filter)
  2. DES observing first half (dark widefield; SN if bad seeing)
  3. Turn on ObsTac (aka, it’ll be g-r-8!)
  4. Mid-night standards
  5. Handover to community observers (04:57 UTC)
  6. [Non-DES: Run Bizarro ObzTak (try not to break anything…)]

Conditions

  1. Clear skies.
  2. Rasicam mostly clear, some power to the southeast. Weather predicts clouds in the second half of the night.
  3. Wind: (Q1) ~5 mph, (Q2) ~11 mph, (Q3) ~5 mph, (Q4) ~13 mph
  4. Crescent moon: ~7% (and setting early)
  5. Seeing: (Q1) 0.8” (z-band), (Q2) 0.9” (r,i), (Q3) 1.1” (g,r), (Q4) 1.1”
  6. DIMM seeing: ~0.5 arcsec
  7. Low dome/primary mirror differential temperature are 2-3 deg C.
  8. Humidity: (Q1) 32%, (Q2) 24%, (Q3) 24%, (Q4) 36%

Accomplishments

  1. Dome flats look good (still high on r, VR, and a little on u)
  2. 3 standard star fields: SDSSJ0843-0000, SDSSJ0200-0000, C26202/HST
  3. 110 g,r,i,z widefield exposures (515954 – 516063). Teffs look good.
  4. 2 standard stars at 04:42: MaxVis and SDSSJ1227-0000

Narrative

  1. Applied assessments after 4PM meeting (38 applied). When preparing for observing, tried “Fetch and Load” again and found 35 exposures, some of which were duplicates of what we had applied before (i.e., the “earthquake exposure”). We applied these as well.
  2. Standard stars without a hitch.
  3. First obstac exposure at 00:44 (515954)
  4. Raised wind screen when gusts reached > 10 mph
  5. Last obstac exposure at 04:36 (516063).
  6. Handover at 04:49 (to be reimbursed by the community tomorrow)
  7. No earthquakes during DES time.
Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.00
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky : 
0
2nd Quarter
Clouds: 
Clear
Wind: 
Medium
Seeing Value: 
1.00
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
3rd Quarter
Clouds: 
Clear
Wind: 
Medium
Seeing Value: 
1.10
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
4th Quarter
Clouds: 
Clear
Wind: 
Medium
Seeing Value: 
1.10
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
1
Program: 
Proposal: 
2012B-0001
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: 
DES
Primary Investigator: 
Frieman
Institution: 
Fermilab
Instrument: 
CTIO 4m DECam
Total Program Time: 
4.5
Proposal: 
2016A-0366
Target of Oportunity: 
No
Time Observed: 
0.0
Time Engineering: 
3.75
Time lost technical: 
0.75
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
Magellanic Satellites Survey (MagLiteS)
Primary Investigator: 
Bechtol
Email: 
keith.bechtol@icecube.wisc.edu
Institution: 
University of Wisconsin -- Madison
Instrument: 
CTIO 4m DECam
Total Program Time: 
4.5
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2016-02-10 4.5 3.75 0.75 0.0 0.0 9