AG Peg in outburst

Information about outbursts of eruptive stars, Be activity, ...
Francois Teyssier
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AG Peg in outburst

Post by Francois Teyssier »

The symbiotic star AG Peg is in outburst.
A exceptionnal event.
AG Peg had undergone a very slow nova event in the middle of the XIXth century, raising to its maximum luminosity from ~ 1850 to ~1870.
Then it declined ; the decline during more than a century ; it recovered its quiescent luminosity at the begening of the XXIth century.

The AAVSO curve of luminosity (since 1941)
AGPeg1.PNG
AGPeg1.PNG (37.73 KiB) Viewed 9789 times
Crop :
AGPeg2.PNG
AGPeg2.PNG (27.64 KiB) Viewed 9789 times
The current increase in luminosity is unique in the story of the star !

Recent soectra : http://www.spectro-aras.com/forum/viewt ... f=6&t=1161

François Teyssier
Olivier GARDE
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Joined: Thu Sep 29, 2011 6:35 am
Location: Rhône Alpes FRANCE
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Re: AG Peg in outburst

Post by Olivier GARDE »

An eshel spectrum (R=11000) taken last night with a RC400 Astrosib and an ATIK 460EX.
Very easy target only 45 minutes exposure

The raw image
Image

The full spectrum (23 orders placed end to end)
Image

And spectrum order by order
Image
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
umberto sollecchia
Posts: 242
Joined: Tue Dec 30, 2014 3:25 pm

Re: AG Peg in outburst

Post by umberto sollecchia »

Bonjour à tous, posé une série de profils de l'étoile.
sincèrement .Umberto
Profilo AG Peg 22-06-2015.png
Profilo AG Peg 22-06-2015.png (3.88 KiB) Viewed 9699 times
Profilo AG Peg23-06-2015.png
Profilo AG Peg23-06-2015.png (3.94 KiB) Viewed 9699 times
Profilo AG peg26-06-2015.png
Profilo AG peg26-06-2015.png (3.84 KiB) Viewed 9699 times
Profilo AG peg27-06-2015.png
Profilo AG peg27-06-2015.png (3.89 KiB) Viewed 9699 times
Profilo AG peg29-06-2015.png
Profilo AG peg29-06-2015.png (3.83 KiB) Viewed 9699 times
Profilo AG peg01-07-2015.png
Profilo AG peg01-07-2015.png (3.86 KiB) Viewed 9699 times
Elio Ricciardiello
Posts: 12
Joined: Tue Dec 06, 2011 9:19 pm
Location: Napoli

Re: AG Peg in outburst

Post by Elio Ricciardiello »

Hi,
I send AG Pegasi spectrum taken by Celestron C11, mounted on 10 Micron GM2000HPS, plus CCD Atik 314L+. The spectrograph is SA 200 with a dispersion of 7.49 A/pixel.

Elio Ricciardiello
+Dario Castellano, Antonio Marino, Antonio Porcelli, Salvatore D'Alterio, Dario Saracino
UAN-Unione Astrofili Napoletanic/o Osservatorio Astronomico di Capodimonte via Moiariello, 1680131 Napoli
Italy
Attachments
ag peg_60s_norm_correct.jpg
ag peg_60s_norm_correct.jpg (51.43 KiB) Viewed 9534 times
Francois Teyssier
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Re: AG Peg in outburst

Post by Francois Teyssier »

Nice result with a SA !
Note that 4686 is He II (ionised helium)
You have also He I lines (5876 ...)
All the best,
François Teyssier
Elio Ricciardiello
Posts: 12
Joined: Tue Dec 06, 2011 9:19 pm
Location: Napoli

Re: AG Peg in outburst

Post by Elio Ricciardiello »

You are right. Mine was a misprint.
Thanks for hint. I refer to atomic He.
Elio Ricciardiello
Elio Ricciardiello
Posts: 12
Joined: Tue Dec 06, 2011 9:19 pm
Location: Napoli

Re: AG Peg in outburst

Post by Elio Ricciardiello »

Hi,
I send a new AG Pegasi spectrum taken on the 29/07/2015 by Celestron C11, mounted on 10 Micron GM2000HPS, plus CCD Atik 314L+. The spectrograph is SA 200 with a dispersion of 7.46 A/pixel.
Elio Ricciardiello+Dario Castellano, Antonio Marino, Antonio Porcelli, Salvatore D'Alterio, Dario Saracino
(Sezione Spettroscopia- Unione Astrofili Napoletani c/ Osservatorio Astronomico di Capodimonte di Napoli)
Attachments
agpeg.jpg
agpeg.jpg (47.03 KiB) Viewed 9433 times
Jacques Montier
Posts: 242
Joined: Sun May 13, 2012 2:46 pm

Re: AG Peg in outburst

Post by Jacques Montier »

Hi all,

AG Peg spectrum on 2015/08/01 with Lhires III 2400 t/mm
20150801_agpeg.png
20150801_agpeg.png (37.65 KiB) Viewed 9404 times
20150801_agpeg_detail.png
20150801_agpeg_detail.png (37.28 KiB) Viewed 9404 times
Regards
--
Jacques Montier
Societe d'Astronomie de Rennes
IAU code J23
Tim Lester
Posts: 168
Joined: Fri Apr 04, 2014 6:31 pm
Location: Arnprior Ontario

Re: AG Peg in outburst

Post by Tim Lester »

AG Peg for 2015-08-09 compared to my last result on 2015-06-27 at its peak magnitude (R=9000).
_agpeg.png
_agpeg.png (11.55 KiB) Viewed 9316 times
_agpeg_Ha.png
_agpeg_Ha.png (7.3 KiB) Viewed 9316 times
Tim
Olivier GARDE
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Re: AG Peg in outburst

Post by Olivier GARDE »

Here's a spectrum of AG Peg taken during spectro meeting at OHP observatory with a LISA
Image
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
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