ASASSN-19aad, possible nova

Alerts and Monitoring of Novae

ASASSN-19aad, possible nova

Postby Francisco Campos » Tue Oct 29, 2019 10:49 pm

Hello,

I have received an alert about ASASSN-19aad as a possible reddened nova. Here is a spectrum taken "in extremis" before the star went out of vision, Very strange, this spectrum.
Star was about mag. 9 yesterday, the day of discovery.

asassn-19aad_ 20191029_754_FPC.png


Greetings,
Fran
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Re: ASASSN-19aad, possible nova

Postby Hamish Barker » Wed Oct 30, 2019 2:55 am

if it clears here (cloudy now) this evening (New Zealand time) I plan to attempt to get spectra with both SA100 ( grating plus prism in converging beam) and LR200 with 600lpmm grating.
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Re: ASASSN-19aad, possible nova

Postby Francois Teyssier » Wed Oct 30, 2019 6:34 am

Congratulations for this excellent spectrum
Very red continuum.
The opacity is strong
You have also He I 6678
Page opened in the database:
http://www.astrosurf.com/aras/Aras_DataBase/Novae/2019_NovaSct2019.htm

François
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Re: ASASSN-19aad, possible nova

Postby Francois Teyssier » Wed Oct 30, 2019 10:27 am

Confirmation

ATEL #13241 ATEL #13241

Title: Spectroscopic Classification of AT 2019tpb/ASASSN-19aad as
a Galactic Nova
Author: S. C. Williams (Turku), M. J. Darnley (LJMU), M. W. Healy
(LJMU), F. J. Murphy-Glaysher (LJMU), C. L. Ransome (LJMU)
Queries: s.williams7@lancaster.ac.uk
Posted: 29 Oct 2019; 20:53 UT
Subjects:Optical, Nova, Transient

We obtained a spectrum of the transient AT 2019tpb/ASASSN-19aad (TCP J18395972-1025415;
see also <a href="http://www.cbat.eps.harvard.edu/unconf/followups/J18395972-1025415.html">CBAT
TOCP</a>) with the FRODOSpec spectrograph (resolution R ~ 5400; <a href="https://ui.adsabs.harvard.edu/abs/2012AN....333..101B/abstract">Barnsley
et al. 2012</a>) on the 2-m Liverpool Telescope (LT; <a href="http://adsabs.harvard.edu/abs/2004SPIE.5489..679S">Steele
et al. 2004</a>) on 2019 Oct 29.81 UT.

The spectrum shows Balmer lines, which exhibit P-Cygni profiles. We measure
the maximum velocity of the H&alpha; absorption component to be ~1500 km/s.
We also find lines from He I (6678, 7065&Aring;) and O I (7773&Aring;)
at the red end of the spectrum, which also all show P-Cygni profiles. There
are numerous lines blueward of H&beta;, mainly absorption lines, although
some may have weak emission components. Our spectrum of AT 2019tpb also
shows absorption lines originating from N II and C II.

This spectrum shows that AT 2019tpb/ASASSN-19aad is a Galactic nova in
the early stages of eruption.
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Re: ASASSN-19aad, possible nova

Postby Hamish Barker » Wed Oct 30, 2019 5:57 pm

great spectrum!

No spectra possible here in Nelson, New Zealand. it was fully clouded, then raining.
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Re: ASASSN-19aad, possible nova

Postby Paolo Cazzato » Tue Nov 05, 2019 6:19 pm

Hallo everybody,
here my last spectrum of ASASSN-19aad taken yesterday evening.
The profile evolved over the days showing a very broad and pronounced H Alpha emission line. In my low resolution spectrum we can see also weak emission lines as FeII (5018.4 A, 5169 A, 6248 A, 6456 A) and maybe a CII line at 7120A.
I hope the weather conditions will improve next week.
Finger crossed
Attachments
ASASSN_19aad.jpg
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Re: ASASSN-19aad, possible nova

Postby umberto sollecchia » Tue Nov 05, 2019 9:36 pm

Bonsoir, voici le profil de la nova observée le 04.11.2019 dans les nuages.
Umberto

novasct2019_20191104_704_U. Sollecchia.png
novasct2019_20191104_704_U. Sollecchia.png (33.31 KiB) Viewed 283 times


vitesse radiale
novasct2019_20191104_704_V.R. - U.Sollecchia.png
novasct2019_20191104_704_V.R. - U.Sollecchia.png (15.62 KiB) Viewed 283 times
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Re: ASASSN-19aad, possible nova

Postby umberto sollecchia » Thu Nov 07, 2019 8:28 pm

Bonsoir à tous, ce soir le temps a permis une excellente observation de cette nova qui va prendre sa retraite. Placez le profil et le graphique du V.R.
Umberto

novasct2019_20191107_702_U.Sollecchia.png
novasct2019_20191107_702_U.Sollecchia.png (29.55 KiB) Viewed 212 times


Viresse radiale
novasct2019_20191107_702_ V.R. - U. Sollecchia.png
novasct2019_20191107_702_ V.R. - U. Sollecchia.png (15.56 KiB) Viewed 212 times
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