SN 2019ein

Robin Leadbeater
Posts: 1926
Joined: Mon Sep 26, 2011 4:41 pm
Contact:

Re: SN 2019ein

Post by Robin Leadbeater »

Type Ia supernovae can be further classified using spectra at maximum light.
The "Branch" classification (Core Normal, Shallow Silicon, Broad Line, Cool) is based on the pseudo equivalent widths of the Si II 5972 and Si II 6355 lines. The pseudo EW and Velocity of the Si II 6355 line can also be used to identify normal and high velocity classes. Based on these systems SN2019ein is Broad Lined, High Velocity and SN2019np is Normal. (See positions overlaid on the graphs from "THE SPECTROSCOPIC DIVERSITY OF TYPE Ia SUPERNOVAE" Blondin et al )

Ia_Branch_Velocity_graphs_SN2019ein_SN2019np.png
Ia_Branch_Velocity_graphs_SN2019ein_SN2019np.png (177.07 KiB) Viewed 9064 times
Robin
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
Vincent Lecocq
Posts: 40
Joined: Fri Mar 04, 2016 3:52 pm

Re: SN 2019ein

Post by Vincent Lecocq »

Hi,

here's my last spectrum of SN2019ein, dated 26th may.
spectre_aras.png
The evolution from 14th may is impressive (spectra corrected from continuum), it's nice to follow such events ! The blue shift has effectively decreased ... .
comparaison.jpeg
Vincent
Francois Teyssier
Posts: 1520
Joined: Fri Sep 23, 2011 1:01 pm
Location: Rouen
Contact:

Re: SN 2019ein

Post by Francois Teyssier »

Summary of your observations gathered in the database: http://www.astrosurf.com/aras/Aras_Data ... 019ein.htm
(Robin Leadbeater, Pascal Le Du, Etienne Bertrand, Christian Buil, Vincent Lecoq, Woody Sims)
sn2019ein.png
sn2019ein.png (91.51 KiB) Viewed 8975 times

Congratulations!
etienne bertrand
Posts: 1040
Joined: Mon Aug 31, 2015 11:26 am

Re: SN 2019ein

Post by etienne bertrand »

Belle observation !
Robin Leadbeater
Posts: 1926
Joined: Mon Sep 26, 2011 4:41 pm
Contact:

Re: SN 2019ein

Post by Robin Leadbeater »

Another spectrum from last night (Taken in twilight. It does not get dark at all here now) The spectrum has evolved more over the last week.
sn2019ein_20190528_20190506_Leadbeater.png
sn2019ein_20190528_20190506_Leadbeater.png (72.98 KiB) Viewed 8957 times
Using SNID, it is a good match to normal type Ia at similar age (~22 days past maximum)
_sn2019ein_20190606_954_SNID.png
_sn2019ein_20190606_954_SNID.png (40.69 KiB) Viewed 8957 times
Robin
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
Post Reply