Page 1 of 2
AG Peg in outburst
Posted: Mon Jun 29, 2015 3:22 am
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 (37.73 KiB) Viewed 11083 times
Crop :
- AGPeg2.PNG (27.64 KiB) Viewed 11083 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
Re: AG Peg in outburst
Posted: Wed Jul 01, 2015 4:22 pm
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
The full spectrum (23 orders placed end to end)
And spectrum order by order
Re: AG Peg in outburst
Posted: Fri Jul 03, 2015 9:43 pm
by umberto sollecchia
Re: AG Peg in outburst
Posted: Thu Jul 23, 2015 9:21 am
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
Re: AG Peg in outburst
Posted: Thu Jul 23, 2015 3:48 pm
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
Re: AG Peg in outburst
Posted: Fri Jul 24, 2015 6:50 am
by Elio Ricciardiello
You are right. Mine was a misprint.
Thanks for hint. I refer to atomic He.
Elio Ricciardiello
Re: AG Peg in outburst
Posted: Thu Jul 30, 2015 5:39 pm
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)
Re: AG Peg in outburst
Posted: Sun Aug 02, 2015 10:38 am
by Jacques Montier
Hi all,
AG Peg spectrum on 2015/08/01 with Lhires III 2400 t/mm
- 20150801_agpeg.png (37.65 KiB) Viewed 10698 times
- 20150801_agpeg_detail.png (37.28 KiB) Viewed 10698 times
Regards
Re: AG Peg in outburst
Posted: Wed Aug 12, 2015 3:16 pm
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 (11.55 KiB) Viewed 10610 times
- _agpeg_Ha.png (7.3 KiB) Viewed 10610 times
Tim
Re: AG Peg in outburst
Posted: Sat Aug 15, 2015 6:47 pm
by Olivier GARDE
Here's a spectrum of AG Peg taken during spectro meeting at OHP observatory with a LISA
