267 citations · 2.3k across the 78 of their papers we have counts for
11 papers · 2 filters
AT 2018cow VLBI: No Long-Lived Relativistic Outflow
Michael F. Bietenholz, Raffaella Margutti, Deanne Coppejans +7
We report on VLBI observations of the fast and blue optical transient (FBOT), AT 2018cow. At ~62 Mpc, AT 2018cow is the first relatively nearby FBOT. The nature of AT 2018cow is no…
Two years of non-thermal emission from the binary neutron star merger GW170817: rapid fading of the jet afterglow and first constraints on the kilonova fastest ejecta
A. Hajela, R. Margutti, K. D. Alexander +27
We present Chandra and VLA observations of GW170817 at ~521-743 days post merger, and a homogeneous analysis of the entire Chandra data set. We find that the late-time non-thermal…
The Optical Afterglow of GW170817: An Off-axis Structured Jet and Deep Constraints on a Globular Cluster Origin
Wen-fai Fong, P. K. Blanchard, K. D. Alexander +25
We present a revised and complete optical afterglow light curve of the binary neutron star merger GW170817, enabled by deep Hubble Space Telescope (HST) F606W observations at $\app…
A Reverse Shock in GRB 181201A
Tanmoy Laskar, Hendrik van Eerten, Patricia Schady +26
We present comprehensive multiwavelength radio to X-ray observations of GRB 181201A spanning from s to days after the burst, comprising the first joint AL…
Constraints on the environment and energetics of the Broad-Line Ic SN2014ad from deep radio and X-ray observations
M. Marongiu, C. Guidorzi, R. Margutti +3
Broad-line type Ic Supernovae (BL-Ic SNe) are characterized by high ejecta velocity ( km s) and are sometimes associated with the relativistic jets typical of…
SN 2016coi (ASASSN-16fp): an energetic H-stripped core-collapse supernova from a massive stellar progenitor with large mass loss
G. Terreran, R. Margutti, D. Bersier +25
We present comprehensive observations and analysis of the energetic H-stripped SN 2016coi (a.k.a. ASASSN-16fp), spanning the -ray through optical and radio wavelengths, acquired…