Observation by Yiannis Belias: My first spectrum (with the star analyse...

Uploaded by

Yiannis Belias

Observer

Yiannis Belias

Observed

2024 Feb 08 - 20:25

Uploaded

2024 Feb 22 - 22:07

Objects

Sirius
Spectrum

Equipment

Celestron C6
Star Analyser 200
ZWO ASI533MM
iOptron HEM15

Exposure

250ms

Location

Athens, Greece.

Target name

Sirius - α Canis Majoris

Title

My first spectrum (with the star analyser)

About this image

This is my first attempt at capturing a star spectrum! I had to learn a lot just to do the very basic stuff :)

Series of 5 .ser video files captured with Sharpcap and focusing using the autofocus method for extended objects on the spectrum (not the star).

Image stacking with Siril - set to keep the best 50% of the frames.

Spectrum processing/plot with Rspec.

Seeing was bad, and I think (hope!) I can get even sharper images on better nights.

Files associated with this observation

22_21_08-rspec-export.png (15.3 kB)

Like this image

Robin Leadbeater, Philip Jennings

Comments

Robin Leadbeater, 2024 Feb 27 - 20:57 UTC

Congratulations on your first spectrum !

The absorption at ~7630A is a telluric band from atmospheric Oxygen. Similarly the other features between there and H alpha are also telluric bands (From H2O) so appear in all spectra taken from the ground. Christian Buil has a nice higher resolution annotated spectrum of Vega which show them in detail at the bottom of the page here

http://www.astrosurf.com/buil/us/vatlas/vatlas.htm

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