Assassin Picture of the Week

2014 November 15

ASASSN-13co: Type-Defying Luminous Type II Supernova

ASASSN-13co was discovered on August 30th, 2013, one of two SNe we discovered that day, which still doesn't happen for us that often. Our 9th supernova discovery, ASASSN-13co, was also our first non-Type Ia supernova, and was about 90 Megaparsecs away, quite a bit further than we expected to find core-collapse Type IIP SNe. We have obtained extensive follow-up data for that event, and our results were just reported in Holoien et al. (2013c) paper (see also Tom's OSU Astronomy Coffee Brief for additional details).

We compared ASASSN-13co to other Type II supernovae and showed that it was a unique event that was not only unusually bright for a Type II supernova but also exhibited an atypical light curve shape that does not cleanly match that of either a standard Type II-L or Type II-P supernova. The fact that we are discovering such unusual events so early in our project is again very encouraging, as it means that we are already exploring new discovery space. Stay tuned for other unusual ASAS-SN events to be reported!

Back to ASAS-SN page.

See previous APOWs:

Bright Supernova Discoveries Statistics

Bright Supernovae: ASAS-SN Contribution

Our Big Boom: ASASSN-14cl

First Light on the Small Magellanic Cloud from Chile

Congratulations to Tom and Jacob!

ASASSN-13dn: Spectra from a New Instrument

ASASSN-14ae, A Very Luminous Transient

Our Latest Paper, in Video Form

Host Galaxies of ASAS-SN Supernovae

Back in Real-Time Discovery Business!

We Have a Logo!

Active (Some Less, Some More) Galactic Nuclei with ASAS-SN

Brutus is EXPANDING!

Swift Ultraviolet and Optical Follow-Up of ASASSN-13dl, Our Latest Supernova

Dramatic AGN Outburst in NGC 2617

M81 and Friends

Two ASAS-SN Views of Orion Nebula

AAVSO Observations of Cataclysmic Variable ASASSN-13ck

Two ASAS-SN Supernovae in One Day!

It is Good to be Lucky!

Extreme M-dwarf Flare Observed by ASAS-SN;

Neptune Discovered!

Multiband photometric follow-up of ASASSN-13aw (SN 2013dr);

"Assassin" Unit 1: Brutus;

How ASAS-SN Discovers Supernovae: Case of Supernova ASASSN-13bb;

NGC 2617: Dramatic Seyfert Type Change;

ASASSN-13/SN 2013da: Our First Supernova Three Weeks Later;

M31 and Companions;

This homepage is maintained by Tom Holoien, Ben Shappee and Kris Stanek. Updated Sat Nov 15 10:46:33 EST 2014

eXTReMe Tracker