Showing 2023 · astro-ph.HEShow all

10 papers · 2 filters

astro-ph.HE2023★ 11 cited

Type Ia Supernova Progenitor Properties and Their Host Galaxies

Sudeshna Chakraborty, Benjamin Sadler, Peter Hoeflich +16

We present an eigenfunction method to analyze 161 visual light curves (LCs) of Type Ia supernovae (SNe Ia) obtained by the Carnegie Supernova Project to characterize their diversit…

astro-ph.HE2023★ 8 cited

The carbon-rich type Ic supernova 2016adj in the iconic dust lane of Centaurus A: signatures of interaction with circumstellar hydrogen?

Maximilian D. Stritzinger, Eddie Baron, Francesco Taddia +24

We present a comprehensive data set of supernova (SN) 2016adj located within the central dust lane of Centaurus A. SN 2016adj is significantly reddened and after correcting the pea…

astro-ph.HE2023★ 25 cited

Ground-based and JWST Observations of SN 2022pul: II. Evidence from Nebular Spectroscopy for a Violent Merger in a Peculiar Type-Ia Supernova

Lindsey A. Kwok, Matthew R. Siebert, Joel Johansson +78

We present an analysis of ground-based and JWST observations of SN~2022pul, a peculiar "03fg-like" (or "super-Chandrasekhar") Type Ia supernova (SN Ia), in the nebular phase at 338…

astro-ph.HE2023★ 20 cited

SN2017egm: A Helium-rich Superluminous Supernova with Multiple Bumps in the Light Curves

Jiazheng Zhu, Ning Jiang, Subo Dong +28

When discovered, SN~2017egm was the closest (redshift ) hydrogen-poor superluminous supernova (SLSN-I) and a rare case that exploded in a massive and metal-rich galaxy. Thu…

astro-ph.HE2023★ 5 cited

Fast and Not-so-Furious: Case Study of the Fast and Faint Type IIb SN 2021bxu

Dhvanil D. Desai, Chris Ashall, Benjamin J. Shappee +36

We present photometric and spectroscopic observations and analysis of SN 2021bxu (ATLAS21dov), a low-luminosity, fast-evolving Type IIb supernova (SN). SN 2021bxu is unique, showin…

astro-ph.HE2023★ 24 cited

The optical behaviour of BL Lacertae at its maximum brightness levels: a blend of geometry and energetics

C. M. Raiteri, M. Villata, S. G. Jorstad +13

In 2021 BL Lacertae underwent an extraordinary activity phase, which was intensively followed by the Whole Earth Blazar Telescope (WEBT) Collaboration. We present the WEBT optical…

astro-ph.HE2023★ 41 cited

The IXPE view of GRB 221009A

Michela Negro, Niccoló Di Lalla, Nicola Omodei +108

We present the IXPE observation of GRB 221009A which includes upper limits on the linear polarization degree of both prompt and afterglow emission in the soft X-ray energy band. GR…

astro-ph.HE2023★ 29 cited

JWST Low-Resolution MIRI Spectral Observations of SN~2021aefx: High-density Burning in a Type Ia Supernova

J. M. DerKacy, C. Ashall, P. Hoeflich +38

We present a JWST/MIRI low-resolution mid-infrared (MIR) spectroscopic observation of the normal Type Ia supernova (SN Ia) SN 2021aefx at +323 days past rest-frame B-band maximum l…

astro-ph.HE2023★ 19 cited

The Carnegie Supernova Project-I. Spectroscopic analysis of stripped-envelope supernovae

S. Holmbo, M. D. Stritzinger, E. Karamehmetoglu +14

An analysis leveraging 170 optical spectra of 35 stripped-envelope (SE) core-collapse supernovae observed by the Carnegie Supernova Project-I and published in a companion paper is…

astro-ph.HE2023★ 9 cited

The Carnegie Supernova Project-I. Optical spectroscopy of stripped-envelope supernovae

M. D. Stritzinger, S. Holmbo, N. Morrell +14

We present 170 optical spectra of 35 low-redshift stripped-envelope core-collapse supernovae observed by the Carnegie Supernova Project-I between 2004 and 2009. The data extend fro…