The Radio Afterglow From GRB 980519: A Test of the Jet and Circumstellar Models

Abstract

We present multi-frequency radio observations from the afterglow of GRB 980519 beginning 7.2 hours after the gamma-ray burst and ending 63 days later. The fast decline in the optical and X-ray light curves for this burst has been interpreted either as afterglow emission originating from a collimated outflow -- a jet -- or the result of a blast wave propagating into a medium whose density is shaped by the wind of an evolved massive star. These two models predict divergent behavior for the radio afterglow, and therefore, radio observations are capable, in principle, of discriminating between the two. We show that a wind model describes the subsequent evolution of the radio afterglow rather well. However, we see strong modulation of the light curve, which we interpret as diffractive scintillation. These variations prevent us from decisively rejecting the jet model.

ApJ, submitted

References in corpus (9)

• Jets in GRBs
• The Dynamics and Light Curves of Beamed Gamma Ray Burst Afterglows
• The unusual afterglow of GRB 980326: evidence for the gamma-ray burst/supernova connection
• Gamma-Ray Burst Environments and Progenitors
• Optical and Radio Observations of the Afterglow from GRB990510: Evidence for a Jet
• GRB 970228 Revisited: Evidence for a Supernova in the Light Curve and La te Spectral Energy Distribution of the Afterglow
• BVRI Observations of the Optical Afterglow of GRB 990510
• The Rapidly Fading Optical Afterglow of GRB 980519
• The X-ray afterglow of GRB980519

Cited by in corpus (35)

• The Physics of Gamma-Ray Bursts
• The collimation--corrected GRB energies correlate with the peak energy of their $\nu F_{\nu }$ spectrum
• Wind Interaction Models for Gamma-Ray Burst Afterglows: The Case for Two Types of Progenitors
• Analytic Light-Curves of Gamma-Ray Burst Afterglows: Homogeneous versus Wind External Media
• GRB Energetics and the GRB Hubble Diagram: Promises and Limitations
• Supernova Hosts for Gamma-Ray Burst Jets: Dynamical Constraints
• Detection of a supernova signature associated with GRB 011121
• Optical Flashes and Very Early Afterglows in Wind Environments
• GRB 011121: A Massive Star Progenitor
• A Jet Model for the Afterglow Emission from GRB000301C
• On the Optical Light Curves of Afterglows from Jetted Gamma-ray Burst Ejecta: Effects of Parameters
• Towards a Model for the Progenitors of Gamma-Ray Bursts
• Gamma-Ray Burst Afterglows as Probes of Environment and Blastwave Physics II: the Distribution of p and Structure of the Circumburst Medium
• Jets, Structured Outflows, and Energy Injection in GRB Afterglows: Numerical Modelling
• Gamma-Ray Burst Afterglows in Pulsar-Wind Bubbles
• Gamma Ray Burst Prompt correlations
• GRB 000418: A Hidden Jet Revealed?
• Gamma-Ray Burst Afterglow emission with a decaying magnetic field
• The jet and circumburst stellar wind of GRB 980519
• Multi-wavelength view of the close-by GRB 190829A sheds light on gamma-ray burst physics
• Constraining the magnetic field in GRB relativistic collisionless shocks using radio data
• Gamma-Ray Bursts: Afterglows and Central Engines
• Environment and Energy Injection Effects in GRB Afterglows
• Surveying the Dynamic Radio Sky with the Long Wavelength Demonstrator Array
• The Arcminute Microkelvin Imager Catalogue of Gamma-ray Burst afterglows at 15.7 GHz
• Happy Birthday Swift: Ultra-long GRB141121A and its broad-band Afterglow
• Gamma-ray burst afterglows from jetted shocks in wind environments
• Microlensing of collimated Gamma-Ray Burst afterglows
• The jet structure and the intrinsic luminosity function of short gamma-ray bursts
• On the optical counterparts of radio transients and variables
• The early radio afterglow of short GRB 230217A
• Rapid radio brightening of GRB 210702A
• Diagnosing Circumburst Environment with Multiband Gamma-Ray Burst Radio Afterglows
• Radio Observations of GRB Afterglows
• Jet-Cocoon Geometry in the Optically Dark, Very High Energy Gamma-ray Burst 201216C