Observation by Kevin Gurney: Dynamics of Beta Lyr

Uploaded by

Kevin Gurney

Observer

Kevin Gurney

Observed

2018 Jun 27 - 23:13

Uploaded

2018 Aug 02 - 13:41

Objects

Sheliak
Spectrum

Equipment

Altair Astro 10in RC truss tube
LHires 2400l/mm
Atik 460EX
MESU200 mount
Prism, Demetra, Isis, BASS

Location

West Sheffield

Target name

Beta Lyr

Title

Dynamics of Beta Lyr

About this image

Some results from my recently acquired Lhires spectrograph. I was keen to take advantage of the recent spate of decent weather (June 2018) and see if I could capture some line profile variation observable over a few days.

The plot shows an animation of four observations of Halpha in Beta Lyr, taken over the nights of 26-30 June. I have used the period of 12.9 days (AAVSO) to compute a phase for each plot and have arbitrarily started with 0 on the 26th. The spectra are all divided by the continuum (rectified) and filtered with a Guassian. The colour coding uses 'darker-to-lighter' to imply temporal progression (I had tried to upload an animation in gif, but this doesent appear to work...).

There is a clear change in going from phase 0 to 0.15, and smaller changes (but with feature trends) in the susbequent three spectra.

I have a couple of other observations which occur in a susbequent period of variability and, when phase plotted, confirm the general fetures shown here. All spectra are available in the BAA spectroscopy database.

Files associated with this observation

anim_comps2.jpg (157.4 kB)

Like this image

David Basey, Jeremy Shears, Graham Winstanley, Andy Wilson, Callum Potter, Peter Carson

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