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ENR CTIO Blanco 4-m 2016-10-21

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Date: 
Friday, October 21, 2016
Telescope: 
CTIO Blanco 4-m
Submitter: 
Youngsoo Park
Submitter Email: 
youngsoo@email.arizona.edu
Observer Support: 
Manuel Hernandez
Night Assistant: 
Alberto Alvarez
Also Present: 
Chris Conselice, Ross Cawthon
Problems: 

None.

Comments: 

Observing Team

 

DES Observers: Chris Conselice, Youngsoo Park, Ross Cawthon
Telops: Manuel Hernandez, Alberto Albarez
Remote Support: —-

Observing Plan

  1. Standard bias and dome flat sequence
  2. Evening standard stars
  3. Run ObsTac queue
  4. End of the night standard stars
  5. End of night calibrations

Conditions

  1. Weather in afternoon: 4pm (local): Clear skies with some overhead clouds
  2. Weather after dinner: 7pm (local): Clear skies with almost no clouds, very few near horizon.
  3. Weather after sunset: 9pm (local): Horizon clouds somewhat subsided but still non-zero.
  4. Weather during night: 1am (local): Clearer with less clouds, but humidity and winds picked up.
  5. Weather summary: 5am (local): Night began with some clouds on the horizon and mild winds. Wind picked up towards the middle of the night and stayed strong throughout. Humidity was higher than yesterday; started near 30%, rose to around 50% by 1am, and fell below 20% by end of the night.
  6. Seeing conditions: Median: 1.30, RMS: 0.40.

Accomplishments

  1. Afternoon: Zeros done. Dome flats (ugrizYVR) done. Flats checked.
  2. Evening: Standards (E1-A, SDSSJ000-0000, SDSSJ2140-0000).
  3. Survey Exposures 584795-584867; 584874-584905; 584912-585051.
  4. SN exposures SN-C2; SN-C3.
  5. End of night: Standards (SDSSJ0320-0000, MaxVis, SDSSJ0958-0100).
  6. Wildlife report: Medium-sized moth killed by the chief, in the same style as his earlier spider killing.

Problems tagged as Synopsis_Problem

No major problems today, no interruption of observing throughout. Some minor problems below.

Minor Problems and Relevant Information

Windscreen was raised at 9:15pm and remained up for the whole night. Atmospheric seeing (from DIMM2) briefly spiked to ~2.0 once at 10pm, came back down, then rose to ~2.0 and stayed there from 11:30pm to 1am. After 1am seeing was stabilized to around 1.0.

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Thin Clouds
Wind: 
Medium
Seeing Value: 
1.50
Seeing Variability: 
0.4
Seeing Source: 
The Telescope I used
Sky : 
2
2nd Quarter
Clouds: 
Thin Clouds
Wind: 
High
Seeing Value: 
1.80
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
2
3rd Quarter
Clouds: 
Thin Clouds
Wind: 
High
Seeing Value: 
1.00
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
1
4th Quarter
Clouds: 
Thin Clouds
Wind: 
High
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: 
8.75
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: 
Joshua Frieman
Email: 
frieman@fnal.gov
Institution: 
Fermilab
Instrument: 
CTIO 4m DECam
Organization: 
NOAO
Total Program Time: 
8.75
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2016-10-21 8.75 0.0 0.0 0.0 0.0 8.75