AG Peg in outburst

[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 (37.73 KiB) Viewed 11082 times

Crop :

AGPeg2.PNG (27.64 KiB) Viewed 11082 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]

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


The full spectrum (23 orders placed end to end)


And spectrum order by order

[umberto sollecchia]

Bonjour à tous, posé une série de profils de l'étoile.
sincèrement .Umberto

Profilo AG Peg 22-06-2015.png (3.88 KiB) Viewed 10992 times

Profilo AG Peg23-06-2015.png (3.94 KiB) Viewed 10992 times

Profilo AG peg26-06-2015.png (3.84 KiB) Viewed 10992 times

Profilo AG peg27-06-2015.png (3.89 KiB) Viewed 10992 times

Profilo AG peg29-06-2015.png (3.83 KiB) Viewed 10992 times

Profilo AG peg01-07-2015.png (3.86 KiB) Viewed 10992 times

[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

[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]

You are right. Mine was a misprint.
Thanks for hint. I refer to atomic He.
Elio Ricciardiello

[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)

[Jacques Montier]

Hi all,

AG Peg spectrum on 2015/08/01 with Lhires III 2400 t/mm

20150801_agpeg.png (37.65 KiB) Viewed 10697 times

20150801_agpeg_detail.png (37.28 KiB) Viewed 10697 times

Regards

[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 (11.55 KiB) Viewed 10609 times

_agpeg_Ha.png (7.3 KiB) Viewed 10609 times

Tim

[Olivier GARDE]

Here's a spectrum of AG Peg taken during spectro meeting at OHP observatory with a LISA