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Jet or Shock Breakout? The Low-Luminosity GRB 060218
C. M. Irwin, R. A. Chevalier
We consider a model for the low-luminosity gamma-ray burst GRB 060218 that plausibly accounts for multiwavelength observations to day 20. The model components are: (1) a long-lived…
A Deep Search for Prompt Radio Emission from Thermonuclear Supernovae with the Very Large Array
Laura Chomiuk, Alicia M. Soderberg, Roger A. Chevalier +10
Searches for circumstellar material around Type Ia supernovae (SNe Ia) are one of the most powerful tests of the nature of SN Ia progenitors, and radio observations provide a parti…
X-ray and radio emission from Type IIn supernova SN 2010jl
Poonam Chandra, Roger A. Chevalier, Nikolai Chugai +2
We present all X-ray and radio observations of the Type IIn supernova SN 2010jl. The X-ray observations cover a period up to day 1500 with Chandra, XMM-Newton, NuSTAR and Swift-XRT…
The Destruction of the Circumstellar Ring of SN 1987A
Claes Fransson, Josefin Larsson, Katia Migotto +23
We present imaging and spectroscopic observations with HST and VLT of the ring of SN 1987A from 1994 to 2014. After an almost exponential increase of the shocked emission from the…
Evolution of the Crab nebula in a low energy supernova
Haifeng Yang, Roger A. Chevalier
The nature of the supernova leading to the Crab Nebula has long been controversial because of the low energy that is present in the observed nebula. One possibility is that there i…
Radio and X-rays From SN 2013df Enlighten Progenitors of Type IIb Supernovae
Atish Kamble, Raffaella Margutti, Alicia M. Soderberg +7
We present radio and X-ray observations of the nearby Type IIb Supernova 2013df in NGC4414 from 10 to 250 days after the explosion. The radio emission showed a peculiar soft-to-har…