Log Book Entry No.87

Days, Calendar Created: 03 Feb 2016 16:24:50 Days, Calendar Last Revised: 03 Feb 2016 17:38:02 Person DavidHadden Text 20160203 Observation

Started data taking at 13:20.

cooler set to -15 degrees, ambient temperature 8 degrees

Sequence of:

  • bias, (dark) 0.1 10, 30, 60, 90, 120
  • Repeated every 30 minutes.
  • Took a large piece of card and evenly illuminated it in order to take flat frames. In order to investigate the cooling ring/dust. Note that if the focus is changed this will have to be repeated.
  • Had to place cover on telescope for dark frames, as an illuminative effect was seen.
  • Ring appeared to be gone as of 15:10, took 01:50 taken to disappear.
  • Bright border remains after above time.
  • at 15:20 started taking 1 second dark and flat frames.
  • 15:50 began taking master bias, dark and flat frames.
  • Joined by Claire at 17:00
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Topic revision: r2 - 03 Feb 2016 - DavidHadden

 
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