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8 papers · 2 filters
Two New Calcium-Rich Gap Transients in Group and Cluster Environments
R. Lunnan, M. M. Kasliwal, Y. Cao +20
We present the Palomar Transient Factory discoveries and the photometric and spectroscopic observations of PTF11kmb and PTF12bho. We show that both transients have properties consi…
Constraints on the Progenitor of SN 2016gkg From Its Shock-Cooling Light Curve
Iair Arcavi, Griffin Hosseinzadeh, Peter J. Brown +17
SN 2016gkg is a nearby Type IIb supernova discovered shortly after explosion. Like several other Type IIb events with early-time data, SN 2016gkg displays a double-peaked light cur…
The progenitor and early evolution of the Type IIb SN 2016gkg
L. Tartaglia, M. Fraser, D. J. Sand +24
We report initial observations and analysis on the Type IIb SN~2016gkg in the nearby galaxy NGC~613. SN~2016gkg exhibited a clear double-peaked light curve during its early evoluti…
Superluminous supernova 2015bn in the nebular phase: evidence for the engine-powered explosion of a stripped massive star
M. Nicholl, E. Berger, R. Margutti +25
We present nebular-phase imaging and spectroscopy for the hydrogen-poor superluminous supernova SN 2015bn, at redshift z=0.1136, spanning +250-400 d after maximum light. The light…
The Superluminous Transient ASASSN-15lh as a Tidal Disruption Event from a Kerr Black Hole
G. Leloudas, M. Fraser, N. C. Stone +47
When a star passes within the tidal radius of a supermassive black hole, it will be torn apart. For a star with the mass of the Sun () and a non-spinning black hole with a…
Type Ibn Supernovae Show Photometric Homogeneity and Spectral Diversity at Maximum Light
Griffin Hosseinzadeh, Iair Arcavi, Stefano Valenti +34
Type Ibn supernovae (SNe) are a small yet intriguing class of explosions whose spectra are characterized by low-velocity helium emission lines with little to no evidence for hydrog…
On the nature of Hydrogen-rich Superluminous Supernovae
C. Inserra, S. J. Smartt, E. E. E. Gall +33
We present two hydrogen-rich superluminous supernovae (SLSNe), namely SN2013hx and PS15br. These objects, together with SN2008es are the only SLSNe showing a distinct, broad Halpha…
Optical and near infrared observations of SN 2014ck: an outlier among the Type Iax supernovae
L. Tomasella, E. Cappellaro, S. Benetti +18
We present a comprehensive set of optical and near-infrared photometric and spectroscopic observations for SN 2014ck, extending from pre-maximum to six months later. These data ind…