Energy Injection Episodes in Gamma Ray Bursts: The Light Curves and Polarization Properties of GRB 021004

Abstract

Several GRB afterglow light curves deviate strongly from the power law decay observed in most bursts. We show that these variations can be accounted for by including refreshed shocks in the standard fireball model previously used to interpret the overall afterglow behavior. As an example we consider GRB 021004 that exhibited strong light curve variations and has a reasonably well time-resolved polarimetry. We show that the light curves in the R-band, X-rays and in the radio can be accounted for by four energy injection episodes in addition to the initial event. The polarization variations are shown to be a consequence of the injections.

arXiv comment4 pages, 2 figures. To appear in ApJL

References in corpus (40)

• Spectra and Light Curves of Gamma-Ray Burst Afterglows
• A very energetic supernova associated with the gamma-ray burst of 29 March 2003
• Spectroscopic Discovery of the Supernova 2003dh Associated with GRB 030329
• Beaming in Gamma-Ray Bursts: Evidence for a Standard Energy Reservoir
• Gamma-Ray Bursts: Progress, Problems & Prospects
• The Dynamics and Light Curves of Beamed Gamma Ray Burst Afterglows
• Theories of Gamma-Ray Bursts
• The Shape of Spectral Breaks in GRB Afterglows
• Refreshed Shocks and Afterglow Longevity in GRB
• Impulsive and Varying Injection in GRB Afterglows
• Multi-Wavelength Afterglows in Gamma-Ray Bursts: Refreshed Shock and Jet Effects
• Images and Spectra From the Interior of a Relativistic Fireball
• Photometry and Spectroscopy of GRB 030329 and Its Associated Supernova 2003dh: The First Two Months
• Linear Polarization and Proper Motion in The Afterglow of Beamed GRBs
• The afterglow of GRB 021004: surfing on density waves
• Some Observational Consequences of GRB Shock Models
• Linear Polarization in Gamma-Ray Bursts: The Case for an Ordered Magnetic Field
• Angular size and emission time scales of relativistic fireballs
• Polarization lightcurves and position angle variation of beamed gamma-ray bursts
• Gamma-ray bursts with continuous energy injection and their afterglow signature
• The polarisation of afterglow emission reveals GRB jet structure
• GRB 021004: Reverse Shock Emission
• The detailed optical light curve of GRB 030329
• The Variable Light Curve of GRB 030329: The Case for Refreshed Shocks
• The bright optical afterglow of the nearby gamma-ray burst of 29 March 2003
• Variability in GRB Afterglows and GRB 021004
• Rings in Fireball Afterglows
• Absorption Systems in the Spectrum of GRB 021004
• Optical Photometry of GRB 021004: The First Month
• Analysis of Two Scenarios for the Early Optical Emission of the GRB Afterglows 990123 and 021211
• Light Curves from an Expanding Relativistic Jet
• Variable polarization in the optical afterglow of GRB 021004
• The X-ray Afterglows of GRB 020813 and GRB 021004 with Chandra HETGS: Possible Evidence for a Supernova Prior to GRB 020813
• The Afterglow of GRB010222: A Case of Continuous Energy Injection
• Intrinsic and dust-induced polarization in gamma-ray burst afterglows: the case of GRB 021004
• Polarization and light curve variability: the "patchy shell" model
• Broadband Modeling of GRB 021004
• The Spectroscopic Variability of GRB 021004
• Small-scale variations in the radiating surface of the GRB 011211 jet
• Discovery of a short plateau phase in the early evolution of a gamma-ray burst afterglow

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• On the Afterglow and Host Galaxy of GRB021004: A Comprehensive Study with the Hubble Space Telescope
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• The Early (<1 hr) Multi-Color Afterglow of GRB 050502a: Possible Evidence for a Uniform Medium with Density Clumps
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• SCUBA sub-millimeter observations of gamma-ray bursters IV. GRB 021004, 021211, 030115, 030226, 041006
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