X ray outburst of V725 Tau

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Robin Leadbeater
Posts: 1926
Joined: Mon Sep 26, 2011 4:41 pm
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X ray outburst of V725 Tau

Post by Robin Leadbeater »

The Be/neutron star binary V725 Tau (A 0535+262) has been undergoing a rare giant X ray outburst during November.
http://www.astronomerstelegram.org/?read=12092
http://www.astronomerstelegram.org/?read=14227

This object is similar to X Per
http://www.spectro-aras.com/forum/viewt ... =14&t=2128
There a only a few low resolution spectra of V725 Tau in BeSS covering many years so it could be a good opportunity to take more during the current outburst. Here is my contribution (H alpha/He 6678 at R~5500 using the LHIRES 1200)

Cheers
Robin
v725tau_20201130_823_Leadbeater.png
v725tau_20201130_823_Leadbeater.png (17.7 KiB) Viewed 2797 times
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
Robin Leadbeater
Posts: 1926
Joined: Mon Sep 26, 2011 4:41 pm
Contact:

Re: X ray outburst of V725 Tau

Post by Robin Leadbeater »

Here is how it compares with the only other medium resolution spectrum in BeSS from 2014 by Paolo Berardi
v725tau_20201130-20140407.png
v725tau_20201130-20140407.png (24.82 KiB) Viewed 2743 times
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
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