Observation by john simpson: VV CEP Polarisation

Uploaded by

john simpson

Observer

john simpson

Observed

2018 Aug 03 - 22:56

Uploaded

2018 Aug 05 - 21:42

Objects

VV-Cep

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Constellation

Hercules

Field centre

RA: 17^h14^m
Dec: +14°34'
Position angle: +89°53'

Field size

0°26' × 0°17'

Equipment

Celestron C6
Astrodon [J-C] V-band filter
WollastonPrism
ATIK 314L+

Location

SW Scotland

Target name

VV CEP

Title

VV CEP Polarisation

About this image

A few more linear polarisation measurements recorded with my set-up since April - though I'm still climbing the learning curve. I've compared my measurements with those made during the 1977 eclipse and tabulated in a paper by R.J.Pfeiffer & R.H.Koch [Astro. Journal, Vol 94, No.2, Aug.1987]. In the weeks following those shown in the trace for 1977, a large polarisation pulse was measured which the authors speculated might be due to the ejection of a large quantity of material from the M star to its hot companion.

Files associated with this observation

VVCEP-POLARISATION.jpg (60.4 kB)

Like this image

Jeremy Shears, David Swan, Kevin Oldham, Grant Privett, Peter Carson, Graham Winstanley, Andy Wilson

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