Skip to search formSkip to main contentSkip to account menu
The Resolved Fraction of the Cosmic X-Ray Background
We present the X-ray source number counts in two energy bands (0.5-2 and 2-10 keV) from a very large source sample: we combine data of six different surveys, both shallow wide-field and deep…
View on IOP Publishing
The Collimation-corrected Gamma-Ray Burst Energies Correlate with the Peak Energy of Their νFν Spectrum
We consider all bursts with known redshift and νFν peak energy, E. For a good fraction of them an estimate of the jet opening angle is available from the achromatic break of their afterglow light…
View on IOP Publishing
Evidence for supernova signatures in the spectrum of the late-time bump of the optical afterglow of GRB 021211
We present photometric and spectroscopic observations of the gamma-ray burst GRB 021211 obtained during the late stages of its afterglow. The light curve shows a rebrightening occurring ∼25 days…
View PDF on arXiv
Gamma-Ray Bursts: New Rulers to Measure the Universe
The best measure of the universe should be done using a standard "ruler" at any redshift. Type Ia supernovae (SN Ia) probe the universe up to z ~ 1.5, while the cosmic microwave background (CMB)…
View on IOP Publishing
Afterglow light curves, viewing angle and the jet structure of γ-ray bursts
Gamma-ray bursts are often modelled as jet-like outflows directed towards the observer; the cone angle of the jet is then commonly inferred from the time at which there is a steepening in the…
View PDF on arXiv
The Rates of Hypernovae and Gamma-Ray Bursts: Implications for Their Progenitors
A critical comparison of estimates for the rates of hypernovae (HNe) and gamma-ray bursts (GRBs) is presented. Within the substantial uncertainties, the estimates are shown to be quite comparable and…
View on IOP Publishing
Off-axis emission of short γ-ray bursts and the detectability of electromagnetic counterparts of gravitational-wave-detected binary mergers
We present calculations of the wide angle emission of short-duration gamma-ray bursts from compact binary merger progenitors. Such events are expected to be localized by their gravitational wave…
View PDF on arXiv
Off-axis Prompt X-Ray Transients from the Cocoon of Short Gamma-Ray Bursts
We present the results of numerical simulations of the prompt emission of short-duration gamma-ray bursts. We consider emission from the relativistic jet, the mildly relativistic cocoon, and the…
View on IOP Publishing
Internal shocks in the jets of radio-loud quasars
The central engine causing the production of jets in radio sources may work intermittently, accelerating shells of plasma with different mass, energy and velocity. Faster but later shells can then…
View PDF on arXiv
Late Time Afterglow Observations Reveal a Collimated Relativistic Jet in the Ejecta of the Binary Neutron Star Merger GW170817.
TLDR
It is shown that structured jets with a relativistic, energetic core surrounded by slower and less energetic wings produce afterglow emission that brightens characteristically with time, as recently seen in the after glow of GW170817.
View on PubMed
...
...
By clicking accept or continuing to use the site, you agree to the terms outlined in our Privacy Policy, Terms of Service, and Dataset License