27 x 3 seconds for each of four analyzer orientations: 0, 45, 90, 135 degrees
135-45 = red, 90-0 = green, 135 - 0 = blue
Image taken 2007 1025 0500 UT (0500z on 25 Oct 2007 UTC)
90 - 0 degrees
135 - 45 degrees
135 - 0 degrees
Comparision to Quanshi Ye's Processed Optical Image (morphing comparison)
http://yeiht.y234.cn/wordpress/wp-gallery/Lulin-Sky-Survey/17p_071025_126.PNG
morphing animation
Clear filter (324 seconds)
Refereed Journal Abstract:
http://www.springerlink.com/content/p25k608154667745/
Polarization of Light Scattered by Cometary Dust Particles: Observations and
Tentative Interpretations
Journal Space Science Reviews
Publisher Springer Netherlands
ISSN 0038-6308 (Print) 1572-9672 (Online)
Issue Volume 90, Numbers 1-2 / October, 1999
DOI 10.1023/A:1005250131509
Pages 163-168
Subject Collection Physics and Astronomy
SpringerLink Date Monday, October 25, 2004
A.-Chantal Levasseur-Regourd
Abstract Analysis of the polarization of light scattered by cometary
particles reveals similarities amongst the phase curves, together with some
clear differences: i) comets with a strong silicate emission feature present a
high maximum in polarization, ii) the polarization is always slightly lower than
the average in inner comae and stronger in jet-like structures. These results
are in excellent agreement with the Greenberg model of dust particles built up
of fluffy aggregates of much smaller grains. Also, they suggest the existence of
different regions of formation, and of different stages of evolution for the
scattering particles inside a given cometary coma.
Comets - Dust particles - Scattering - Polarization
Taken on October 24, 2007 from my backyard in Castro Valley, California
Stinger 450 Classical Cassegrain (18" f/12.6)
Lumicon Giant Easy Guider with Focal reducer for final: F= 3366mm, f/7.1
(image scale = 0.42 arc-sec/pixel at capture)
Finger Lakes CM10 MaxCam imaging camera operated at -25C
Robofocus
Finger Lakes CFW1 Filter wheel
SBIG ST7E guide camera
Analyzing filters
27 exposures of 3 seconds through each analyzer orientation: 0, 45, 90, 135 degrees
324 seconds total exposure time