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/ ... html">CBAT
TOCP</a>) with the FRODOSpec spectrograph (resolution R ~ 5400; <a href="
https://ui.adsabs.harvard.edu/abs/2012A ... ">Barnsley
et al. 2012</a>) on the 2-m Liverpool Telescope (LT; <a href="
http://adsabs.harvard.edu/abs/2004SPIE. ... 9S">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 Hα absorption component to be ~1500 km/s.
We also find lines from He I (6678, 7065Å) and O I (7773Å)
at the red end of the spectrum, which also all show P-Cygni profiles. There
are numerous lines blueward of Hβ, 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.