The X-ray afterglow of GRB 020322

Abstract

The spectrum of the afterglow of GRB 020322 is the highest-quality X-ray spectrum of a GRB afterglow available to date. It was detected by XMM-Newton in an observation starting fifteen hours after the GRB with a mean 0.2--10.0 keV observed flux of 3.5+/-0.2x10^-13 erg cm^-2 s^-1, making it the brightest X-ray afterglow observed so far with XMM-Newton. The source faded; its lightcurve was well fit by a power-law with a decay index of 1.26+/-0.23. The spectrum is adequately fit with a power-law absorbed with neutral or ionised gas significantly in excess of the foreground Galactic column, at redshift 1.8_{-1.1}^{+1.0} or with low metal abundances. No spectral line or edge features are detected at high significance, in particular, a thermal emission model fits the data poorly, the upper limit on its contribution to the spectrum is 3.7x10^-14 erg cm^-2 s^-1, or at most ~10% of the total flux. No spectral variability is observed.

arXiv comment5 pages, 3 figures, accepted for publication in A&A Letters

References in corpus (16)

• The European Photon Imaging Camera on XMM-Newton: The MOS Cameras
• Beaming in Gamma-Ray Bursts: Evidence for a Standard Energy Reservoir
• The Observed Offset Distribution of Gamma-Ray Bursts from Their Host Galaxies: A Robust Clue to the Nature of the Progenitors
• Caltech Faint Galaxy Redshift Survey X: A Redshift Survey in the Region of the Hubble Deep Field North
• A gamma ray burst with small contamination
• Observation of X-ray lines from a Gamma-Ray Burst (GRB991216): Evidence of Moving Ejecta from the Progenitor
• The Signature of Supernova Ejecta Measured in the X-ray Afterglow of Gamma-Ray Burst 011211
• Physical Parameters for the Afterglows of GRB 980703, 990123, 990510, and 991216 Determined from Modeling of Multi-Frequency Data
• Discovery of a Transient Absorption Edge in the X-ray Spectrum of GRB 990705
• Discovery of a redshifted Iron K-line in the X-ray afterglow of GRB 000214
• Detection of the optical afterglow of GRB 000630: Implications for dark bursts
• Temporal properties of gamma-ray bursts as signatures of jets from the central engine
• Determining the location of Gamma-Ray Bursts through the evolution of their soft X-ray absorption
• A Possible Emission Feature in an X-ray Afterglow of GRB970828 as a Radiative Recombination Edge
• The X-ray afterglows of gamma-ray bursts GRB 001025A and GRB 010220 observed with XMM-Newton
• On the absorption feature in the prompt X-ray spectrum of GRB 990705

Cited by in corpus (18)

• A Standard Kinetic Energy Reservoir in Gamma-Ray Burst Afterglows
• The extinction curves of star-forming regions from z=0.1 to 6.7 using GRB afterglow spectroscopy
• Absorption in Gamma Ray Burst afterglows
• Very different X-ray to optical column density ratios in gamma-ray burst afterglows: ionisation in GRB environments
• A very low luminosity X-ray flash: XMM-Newton observations of GRB 031203
• Towards a complete theory of Gamma Ray Bursts
• Gamma-Ray Burst afterglows as probes of environment and blastwave physics I: absorption by host galaxy gas and dust
• How Special Are Dark Gamma-Ray Bursts: A Diagnostic Tool
• Delayed soft X-ray emission lines in the afterglow of GRB 030227
• Helium in natal HII regions: the origin of the X-ray absorption in gamma-ray burst afterglows
• Soft X-ray emission lines in the afterglow spectrum of GRB 011211:- a detailed XMM-Newton analysis
• A Search for Discrete X-ray Spectral Features in a Sample of Bright Gamma-ray Burst Afterglows
• Dust extinction bias in the column density distribution of gamma-ray bursts; high column density, low redshift GRBs are more heavily obscured
• X-ray continuum properties of GRB afterglows observed by XMM-Newton and Chandra
• INTEGRAL and XMM-Newton observations of the weak GRB 030227
• XMM-Newton and VLT observations of the afterglow of GRB040827
• Massive star-formation rates of gamma-ray burst host galaxies: an unobscured view in X-rays
• Long-term monitoring of the X-ray afterglow of GRB 050408 with Swift/XRT