Showing 2018 · astro-ph.HEShow all

16 papers · 2 filters

astro-ph.HE2018★ 53 cited

Probing type Ia supernova properties using bolometric light curves from the Carnegie Supernova Project and the CfA Supernova Group

Richard A. Scalzo, Emilie Parent, Christopher Burns +11

We present bolometric light curves constructed from multi-wavelength photometry of Type Ia supernovae (SNe Ia) from the Carnegie Supernova Project and the CfA Supernova Group, usin…

astro-ph.HE2018★ 49 cited

The ASAS-SN Bright Supernova Catalog -- IV. 2017

T. W. -S. Holoien, J. S. Brown, P. J. Vallely +41

In this catalog we compile information for all supernovae discovered by the All-Sky Automated Survey for SuperNovae (ASAS-SN) as well as all other bright (), spectr…

astro-ph.HE2018★ 91 cited

Carnegie Supernova Project-II: Extending the Near-Infrared Hubble Diagram for Type Ia Supernovae to

M. M. Phillips, Carlos Contreras, E. Y. Hsiao +41

The Carnegie Supernova Project-II (CSP-II) was an NSF-funded, four-year program to obtain optical and near-infrared observations of a "Cosmology" sample of Type Ia supern…

astro-ph.HE2018★ 18 cited

Strongly Bipolar Inner Ejecta of the Normal Type IIP Supernova ASASSN-16at

Subhash Bose, Subo Dong, N. Elias-Rosa +24

We report distinctly double-peakedH-alpha and H-beta emission lines in the late-time, nebular-phase spectra (>~200 d) of the otherwise normal at early phases (<~ 100 d) Type IIP su…

astro-ph.HE2018★ 29 cited

The first 48: Discovery and progenitor constraints on the Type Ia supernova 2013gy

S. Holmbo, M. D. Stritzinger, B. J. Shappee +26

We present an early-phase -band light curve and visual-wavelength spectra of the normal Type Ia supernova (SN) 2013gy. The light curve is constructed by determining the appropri…

astro-ph.HE2018★ 61 cited

Red vs Blue: Early observations of thermonuclear supernovae reveal two distinct populations?

Maximilian D. Stritzinger, Benjamin J. Shappee, Anthony L. Piro +10

We examine the early phase intrinsic color evolution of a dozen Type~Ia supernovae discovered within three days of the inferred time of first light () and ha…

astro-ph.HE2018★ 236 cited

The Cow: discovery of a luminous, hot and rapidly evolving transient

S. J. Prentice, K. Maguire, S. J. Smartt +27

We present the ATLAS discovery and initial analysis of the first 18 days of the unusual transient event, ATLAS18qqn/AT2018cow. It is characterized by a high peak luminosity (…

astro-ph.HE2018★ 17 cited

AT 2017be - a new member of the class of Intermediate-Luminosity Red Transients

Y-Z. Cai, A. Pastorello, M. Fraser +20

We report the results of our spectrophotometric monitoring campaign for AT~2017be in NGC~2537. Its lightcurve reveals a fast rise to an optical maximum, followed by a plateau lasti…

astro-ph.HE2018★ 87 cited

Seeing Double: ASASSN-18bt Exhibits a Two-Component Rise in the Early-Time K2 Light Curve

B. J. Shappee, T. W. -s. Holoien, M. R. Drout +109

On 2018 Feb. 4.41, the All-Sky Automated Survey for SuperNovae (ASAS-SN) discovered ASASSN-18bt in the K2 Campaign 16 field. With a redshift of z=0.01098 and a peak apparent magnit…

astro-ph.HE2018★ 50 cited

A nearby superluminous supernova with a long pre-maximum 'plateau' and strong CII features

J. P. Anderson, P. J. Pessi, L. Dessart +63

Super-luminous supernovae (SLSNe) are rare events defined as being significantly more luminous than normal terminal stellar explosions. The source of the extra powering needed to a…

astro-ph.HE2018★ 35 cited

Near-infrared spectral evolution of the Type Ia supernova 2014J in the nebular phase: implications for the progenitor system

T. R. Diamond, P. Hoeflich, E. Y. Hsiao +11

As the closest Type Ia supernova in decades, SN 2014J provides a unique opportunity for detailed investigation into observational signatures of the progenitor system and explosion…

astro-ph.HE2018

The lowest metallicity type II supernova from the highest mass red-supergiant progenitor

J. P. Anderson, L. Dessart, C. P. Gutiérrez +29

Red supergiants have been confirmed as the progenitor stars of the majority of hydrogen-rich type II supernovae. However, while such stars are observed with masses >25M, de…

astro-ph.HE2018★ 65 cited

SN 2012fr: Ultraviolet, Optical, and Near-Infrared Light Curves of a Type Ia Supernova Observed Within a Day of Explosion

Carlos Contreras, M. M. Phillips, Christopher R. Burns +32

We present detailed ultraviolet, optical and near-infrared light curves of the Type Ia supernova (SN) 2012fr, which exploded in the Fornax cluster member NGC 1365. These precise hi…

astro-ph.HE2018★ 31 cited

The nebular spectra of the transitional Type Ia Supernovae 2007on and 2011iv: broad, multiple components indicate aspherical explosion cores

P. A. Mazzali, C. Ashall, E. Pian +5

The nebular-epoch spectrum of the rapidly declining, "transitional" type Ia supernova (SN) 2007on showed double emission peaks, which have been interpreted as indicating that the S…

astro-ph.HE2018★ 42 cited

On the type Ia supernovae 2007on and 2011iv: Evidence for Chandrasekhar-mass explosions at the faint end of the luminosity-width relationship

C. Ashall, P. A. Mazzali, M. D. Stritzinger +7

Radiative transfer models of two transitional type Ia supernova (SNe Ia) have been produced using the abundance stratification technique. These two objects --designated SN 2007on a…

astro-ph.HE2018★ 50 cited

Observed Type II supernova colours from the Carnegie Supernova Project-I

T. de Jaeger, J. P. Anderson, L. Galbany +12

We present a study of observed Type II supernova (SN~II) colours using optical/near-infrared photometric data from the \textit{Carnegie Supernovae Project-I}. We analyse four colou…