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A Distance Estimate to the Cygnus Loop Based on the Distances to Two Stars Located Within the Remnant
Robert A. Fesen, Jack M. M. Neustadt, Christine S. Black +1
Underlying nearly every quantitative discussion of the Cygnus Loop supernova remnant is uncertainty about its distance. Here we present optical images and spectra of nebulosities a…
Jets in Hydrogen-poor Super-luminous Supernovae: Constraints from a Comprehensive Analysis of Radio Observations
D. L. Coppejans, R. Margutti, C. Guidorzi +16
The energy source powering the extreme optical luminosity of hydrogen-stripped Superluminous Supernovae (SLSNe-I) is not known, but recent studies have highlighted the case for a c…
The Transition of a Type IIL Supernova into a Supernova Remnant: Late-time Observations of SN 2013by
C. S. Black, D. Milisavljevic, R. Margutti +3
We present early-time Swift and Chandra X-ray data along with late-time optical and near-infrared observations of SN 2013by, a Type IIL supernova (SN) that occurred in the nearby s…
The Impact of Progenitor Mass Loss on the Dynamical and Spectral Evolution of Supernova Remnants
Daniel J. Patnaude, Shiu-Hang Lee, Patrick O. Slane +4
There is now substantial evidence that the progenitors of some core-collapse supernovae undergo enhanced or extreme mass loss prior to explosion. The imprint of this mass loss is o…
Hydrogen-Poor Superluminous Supernovae from the Pan-STARRS1 Medium Deep Survey
R. Lunnan, R. Chornock, E. Berger +31
We present light curves and classification spectra of 17 hydrogen-poor superluminous supernovae (SLSNe) from the Pan-STARRS1 Medium Deep Survey (PS1 MDS). Our sample contains all o…
SN 2014C: VLBI Images of a Supernova Interacting with a Circumstellar Shell
Michael F. Bietenholz, A. Kamble, R. Margutti +2
We report on VLBI measurements of supernova 2014C at several epochs between and 1057 days after the explosion. SN 2014C was an unusual supernova that initially had Type I…
TRES Survey of Variable Diffuse Interstellar Bands
Charles J. Law, Dan Milisavljevic, Kyle N. Crabtree +8
Diffuse interstellar bands (DIBs) are absorption features commonly observed in optical/near-infrared spectra of stars and thought to be associated with polyatomic molecules that co…
iPTF15eqv: Multi-wavelength Exposé of a Peculiar Calcium-rich Transient
D. Milisavljevic, D. Patnaude, J. Raymond +15
The progenitor systems of the class of "Ca-rich transients" is a key open issue in time domain astrophysics. These intriguing objects exhibit unusually strong calcium line emission…
Results from a systematic survey of X-ray emission from Hydrogen-poor Superluminous Supernovae
Raffaella Margutti, R. Chornock, B. D. Metzger +11
We present the results from a sensitive X-ray survey of 26 nearby hydrogen-poor superluminous supernovae (SLSNe-I) with Swift, Chandra and XMM. This dataset constrains the SLSN evo…
The Nearby Type Ibn Supernova 2015G: Signatures of Asymmetry and Progenitor Constraints
Isaac Shivvers, WeiKang Zheng, Schuyler D. Van Dyk +24
We present the results of an extensive observational campaign on the nearby Type Ibn SN 2015G, including data from radio through ultraviolet wavelengths. SN 2015G was asymmetric, s…
The Supernova -- Supernova Remnant Connection
Dan Milisavljevic, Robert A. Fesen
Many aspects of the progenitor systems, environments, and explosion dynamics of the various subtypes of supernovae are difficult to investigate at extragalactic distances where the…