Transcient ASASSN-14cl

Information about outbursts of eruptive stars, Be activity, ...

Transcient ASASSN-14cl

Postby Francois Teyssier » Sun Jun 15, 2014 12:16 am

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

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Re: Transcient ASASSN-14cl

Postby Francois Teyssier » Sun Jun 15, 2014 12:30 am

Field of view

asassn-14cl.PNG
asassn-14cl.PNG (50.02 KiB) Viewed 3635 times



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Re: Transcient ASASSN-14cl

Postby Francois Teyssier » Sun Jun 15, 2014 1:21 am

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

_asassn-14cl_20140615_000_fteyssier.png
_asassn-14cl_20140615_000_fteyssier.png (4.54 KiB) Viewed 3630 times


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Re: Transcient ASASSN-14cl

Postby Christian Buil » Sun Jun 15, 2014 9:04 am

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

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Re: Transcient ASASSN-14cl

Postby Francois Teyssier » Sun Jun 15, 2014 10:28 am

Thank you Christian

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

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Re: Transcient ASASSN-14cl

Postby Paolo Berardi » Sun Jun 15, 2014 6:19 pm

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

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Re: Transcient ASASSN-14cl

Postby Tim Lester » Mon Jun 16, 2014 10:22 pm

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... :?:

Image

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Re: Transcient ASASSN-14cl

Postby Francois Teyssier » Wed Jun 18, 2014 7:43 pm

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/feuilles/CV/SS%20Cyg.html
However I'll verify my images.
Could you send me your spectrum for the database, Tim?
All the best
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