Log Book Entry No.6

Days, Calendar Created: 31 Aug 2013 21:23:58 Days, Calendar Last Revised: 05 Sep 2013 10:53:06 Person PedroPaiva Text Focus and Filters

Average filter wavelength

  • Blue: 450mm
  • Green: 550mm
  • Red: 650mm

ST-8ME Quantum Efficiency:

qe_st8xme.gif

  • Blue: 55%
    • 1.82x exposure from clear
    • 60s clear -> 109s
  • Green: 70%
    • 1.43x exposure from clear
    • 60s clear -> 86s
  • Red: 75%
    • 1.33x exposure from clear
    • 60s clear -> 80s

Test Images

M57 - Ring Nebula

M56 - Globular Cluster

  • 1x60s Luminance image

M27 - Dumbbell Nebula

  • 9x60s Luminance images stacked to form a 6x60s image
  • 1x109s Blue image
  • 1x86s + 2x60s Green images
  • 1x86s + 5x60s Red images


During the Dumbbell Nebula imaging the filters were accidentally changed due to the mouse scroll.

  • Possible workarounds:
    • Use autosave function to take images
    • Check before taking a new single image

Back to: LogBookAstronomy

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Subject Focus and Filters
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Topic attachments
I Attachment Action Size Date Who Comment
GIFgif qe_st8xme.gif manage 8.3 K 31 Aug 2013 - 21:13 PedroPaiva SBIG ST-8XME Quantum Efficiency

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Topic revision: r3 - 05 Sep 2013 - PedroPaiva

 
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