Transcient ASASSN-14cl

[Francois Teyssier]

Detection of a bright transcient (mag 10.7) ASASSN-14cl

AD 21 54 57.6
DE 26 41 16

ATel 6233
http://www.astronomerstelegram.org/?read=6233

Perhaps a CV outburst

François

[Francois Teyssier]

Field of view

asassn-14cl.PNG (50.02 KiB) Viewed 8582 times

François

[Francois Teyssier]

CV in outburst, with noticely He II in emission
Line at 6926 is a cosme, not removed

_asassn-14cl_20140615_000_fteyssier.png (4.54 KiB) Viewed 8577 times

François

[Christian Buil]

Excellent reactivity! A rare event at this magnitude
(for me, permament bad weather on Toulouse )

Christian

[Francois Teyssier]

Thank you Christian

Here's the ATel reporting the identification
http://www.astronomerstelegram.org/?read=6235

François

[Paolo Berardi]

Fantastic, congratulations François!
Italy is under storms, weather forecasts say for another week...

Paolo

[Tim Lester]

Congratulations François!

I was able to get a spectrum through high altitude haze on June 16th (calibrated using HD208906 and the Miles spectrum).
Don't seem to be picking up the He II emission...



Tim

[Francois Teyssier]

Thank you Paolo and Tim.
The changes in spectra of DN in outburst are very fast.
See for instance SS Cyg : http://www.astronomie-amateur.fr/feuill ... 20Cyg.html
However I'll verify my images.
Could you send me your spectrum for the database, Tim?
All the best
François