Optical and NIR Observations of the Afterglow of GRB 020813
arXiv:astro-ph/0304171 · doi:10.1051/0004-6361:20030525
Abstract
We present optical and near-infrared (NIR) photometry of the bright afterglow of GRB 020813. Our data span from 3 hours to 4 days after the GRB event. A rather sharp achromatic break is present in the light curve, 14 hours after the trigger. In the framework of jetted fireballs, this break corresponds to a jet half opening angle of (1.9 +- 0.2) deg, the smallest value ever inferred for a GRB. We discuss our results in the framework of currently available models, and find that they have problems in explaining the joint temporal and spectral properties, and in particular the slow decay before the break.
5 pages, 4 (color) figures; minor changes introduced; published in A&A Letters; includes aa.cls and txfonts.sty
References in corpus (23)
- Spectra and Light Curves of Gamma-Ray Burst Afterglows
- Gamma-Ray Bursts and the Fireball Model
- Beaming in Gamma-Ray Bursts: Evidence for a Standard Energy Reservoir
- Discovery of the X-Ray Afterglow of the Gamma-Ray Burst of February 28 1997
- The Dynamics and Light Curves of Beamed Gamma Ray Burst Afterglows
- Theories of Gamma-Ray Bursts
- Analytic Light-Curves of Gamma-Ray Burst Afterglows: Homogeneous versus Wind External Media
- The prompt energy release of gamma-ray bursts using a cosmological k-correction
- Optical and Radio Observations of the Afterglow from GRB990510: Evidence for a Jet
- Impulsive and Varying Injection in GRB Afterglows
- A gamma ray burst with small contamination
- BVRI Observations of the Optical Afterglow of GRB 990510
- Afterglow Emission from Highly Collimated Jets with Flat Electron Spectra: Application to the GRB 010222 Case?
- On Beaming Effects in Afterglow Light Curves
- Optical Spectropolarimetry of the GRB 020813 Afterglow
- The Afterglow of GRB 990123 and a Dense Medium
- GRB 010222: A Burst Within a Starburst
- GRB010222: afterglow emission from a rapidly decelerating shock
- The Afterglow of GRB010222: A Case of Continuous Energy Injection
- Rapid UBVRI Follow-up of the Highly Collimated Optical Afterglow of GRB010222
- Colors and luminosities of the optical afterglows of the gamma-ray bursts
- GRB 010921: Strong Limits on an Underlying Supernova from HST
- LOTIS, Super-LOTIS, SDSS and Tautenburg Observations of GRB 010921
Cited by in corpus (30)
- Signatures of Extragalactic Dust in pre-Swift GRB Afterglows
- Linear Polarization in Gamma-Ray Bursts: The Case for an Ordered Magnetic Field
- Towards a complete theory of Gamma Ray Bursts
- Probing a GRB progenitor at a redshift of z=2: a comprehensive observing campaign of the afterglow of GRB 030226
- A flash in the dark: UVES/VLT high resolution spectroscopy of GRB afterglows
- The clustering of the luminosities of optical afterglows of long Gamma Ray Bursts
- Jets, Structured Outflows, and Energy Injection in GRB Afterglows: Numerical Modelling
- Phenomenology of Reverse-Shock Emission in the Optical Afterglows of Gamma Ray Bursts
- Photometric redshifts for GRB afterglows from GROND and Swift/UVOT
- Infrared and Optical Observations of GRB 030115 and its Extremely Red Host Galaxy: Implications for Dark Bursts
- Models for Achromatic Light-Curve Breaks in GRB Afterglows: Jets, Structured Outflows, and Energy Injection
- On the jet structure and magnetic field configuration of GRB 020813
- Gamma-Ray Bursts: Polarization of Afterglows from Two-Component Jets
- Temporal Variation in Excited Fe^+ Near a GRB Afterglow
- Dust Extinction of Gamma-ray Burst Host Galaxies: Identification of Two Classes?
- GRB 020813: polarization in the case of a smooth optical decay
- Jet break time -- flux density relationship and constraints on physical parameters of GRB afterglows
- High-Precision Photometry of the Gamma-Ray Burst 020813: The Smoothest Afterglow Yet
- Swift observations of GRB050128: the early X-ray afterglow
- An Estimation of the Gamma-Ray Burst Afterglow Apparent Optical Brightness Distribution Function
- Discovery of the Near-IR Afterglow and of the Host of GRB 030528
- Hard Electron Energy Distribution in the Relativistic Shocks of GRB Afterglows
- Gamma-ray Burst Afterglows: Time-Varying Extinction, Polarization, and Colors due to Rotational Disruption of Dust Grains
- Out of the darkness: the infrared afterglow of the INTEGRAL burst GRB 040422 observed with the VLT
- On the optical counterparts of radio transients and variables
- The weak INTEGRAL bursts GRB040223 and GRB040624: an emerging population of dark afterglows
- Long-term monitoring of the X-ray afterglow of GRB 050408 with Swift/XRT
- Modelling the Multi-band Afterglow of GRB 091127: Evidence of a Hard Electron Energy Spectrum with an Injection Break
- Reconsidering the origin of the X-ray emission lines in GRB 011211
- Can the Bump be Observed in the Early Afterglow of GRBS with X-Ray Line Emission Features?