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T Tauri campaign - call for spectra

Robin Leadbeater's picture
Robin Leadbeater
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Joined: 2012-10-08

The ARAS group preliminary results in response to this request can be found here

http://www.astrosurf.com/aras/Aras_TTauri/T_Tauri_Campaign.html

I am currently looking at the feasibility of using the Star Analyser to meet one of the aspects of the project. 

http://www.spectro-aras.com/forum/viewtopic.php?f=28&t=482

 

Cheers

Robin

A first look with the Star Analyser
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Robin Leadbeater
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Joined: 2012-10-08

Here are the results of a first look at the the T Tauri campaign targets using the Star Analyser

http://www.spectro-aras.com/forum/viewtopic.php?f=28&t=502

 

Cheers

Robin

A remarkable large, fast transient in the spectrum of DN Tau
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Robin Leadbeater
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Joined: 2012-10-08

On 2012-12-09 I detected a remarkable transient in the spectrum of DN Tau using the Star Analyser.


88 x 20 sec spectra show a rise in total flux (4000-7500A) of ~130% in just 6 minutes, followed by a rapid drop over the following 6 minutes and a continuing slow fall over the next 40 minutes to ~20% of the initial level. The flux increase was greatest at the blue end (a 300% increase at 4500A)

More details here
http://www.threehillsobservatory.co.uk/ ... ra_42a.htm
and a description of the technique here
http://www.threehillsobservatory.co.uk/ ... tra_42.htm

Cheers
Robin

Great catch! Well
Ken4optics's picture
Ken4optics
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Joined: 2012-04-02

Great catch!

Well done.

This shows clearly what can be achieved with a simple grating set-up.

Obviously very capable of detecting transient phenonoma.

We should be more active in this area........

I agree this is a great catch
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uis01
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Joined: 2010-07-25

I agree this is a great catch Robin.  This adds to the possible projects that one can do with this setup.

 

Revised T-Tauri spectroscopic programme
Robin Leadbeater's picture
Robin Leadbeater
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Joined: 2012-10-08

Based on an analysis of the spectroscopic data collected on the T-Tauri tagets, the revised ARAS programme for the upcoming season can be found here.

http://www.astrosurf.com/aras/Aras_TTauri/T_Tauri_Campaign.html

I have made several further spectroscopic observations of DN Tau using a Star Analyser but have seen no further fast transient events.

 

Robin

www.threehillsobservatory.co.uk 

AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484