Observation by Kevin Gurney: Chromospheric activity in Xi Boo

Uploaded by

Kevin Gurney

Observer

Kevin Gurney

Observed

2020 Apr 21 - 17:35

Uploaded

2020 May 19 - 17:50

Objects

ξ-Boo
Spectrum

Equipment

Celestron C11
Shelyak Lhires III
Mesu 200 mount
Atik 460Ex

Exposure

10 subs, 300s each

Location

Sheffield

Target name

Xi Boo

Title

Chromospheric activity in Xi Boo

About this image

My interest was piqued by a web page describing observations of the H and K Ca lines using a Lhires spectroscope (Christian Buil

http://www.astrosurf.com/buil/chromospheric_activity/ )

The observation of emission peaks in the wider absorption profiles of these lines is evidence (apparently) of so-called 'chromospheric activity'.

I tried some of the suggetsed targets including that shown here (Xi boo, HD 131156). The peaks are clear I think.

This was tricky to calibrate as I relied on weak lines due to traces of argon in the usual 'neon' lamp. You should really use the argon/neon lamp but I wasn't about to strip down my Lhires.... I fould two calibration lines that were suitable with a longer-than-usual calibration exposure (45s).

Files associated with this observation

Xi Boo_21_April.jpg (90.7 kB)

Like this image

David Basey, Jeremy Shears, Dr Andrew Smith, Graham Winstanley, Andy Wilson, Robin Leadbeater

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