GRB 030227: the first multiwavelength afterglow of an INTEGRAL GRB

Abstract

We present multiwavelength observations of a gamma-ray burst detected by INTEGRAL (GRB 030227) between 5.3 hours and ~1.7 days after the event. Here we report the discovery of a dim optical afterglow (OA) that would not have been detected by many previous searches due to its faintess (R~23). This OA was seen to decline following a power law decay with index Alpha_R= -0.95 +/- 0.16. The spectral index Beta_opt/NIR yielded -1.25 +/- 0.14. These values may be explained by a relativistic expansion of a fireball (with p = 2.0) in the cooling regime. We also find evidence for inverse Compton scattering in X-rays.

5 pages, 5 figures, accepted for publication in A&A

References in corpus (15)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• Spectra and Light Curves of Gamma-Ray Burst Afterglows
• Discovery of the peculiar supernova 1998bw in the error box of GRB980425
• Optical and Long Wavelength Afterglow from Gamma-Ray Bursts
• 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
• Detection of the optical afterglow of GRB 000630: Implications for dark bursts
• The Integral Burst Alert System (IBAS)
• BeppoSAX measurements of the bright gamma-ray burst 010222
• The jet and circumburst stellar wind of GRB 980519
• The afterglow and complex environment of the optically dim burst GRB 980613
• The Earliest Optical Observations of GRB 030329
• INTEGRAL and XMM-Newton observations of the weak GRB 030227
• GRB 030227: the first multiwavelength afterglow of an INTEGRAL GRB
• Constraints on the optical afterglow emission of the short/hard burst GRB 010119

Cited by in corpus (17)

• Signatures of Extragalactic Dust in pre-Swift GRB Afterglows
• Swift Identification of Dark Gamma-Ray Bursts
• The Integral Burst Alert System (IBAS)
• The Troublesome Broadband Evolution of GRB 061126: Does a Grey Burst Imply Grey Dust?
• GRB 020410: A Gamma-Ray Burst Afterglow Discovered by its Supernova Light
• Phenomenology of Reverse-Shock Emission in the Optical Afterglows of Gamma Ray Bursts
• GRB 021004 modelled by multiple energy injections
• The updated spectral catalogue of INTEGRAL Gamma-Ray Bursts
• The puzzling case of GRB 990123: prompt emission and broad-band afterglow modeling
• The potential of INTEGRAL for the detection of high redshift GRBs
• Determining the Dust Extinction of Gamma-ray Burst Host Galaxies: A Direct Method Based on Optical and X-ray Photometry
• Discovery of the Near-IR Afterglow and of the Host of GRB 030528
• GRB 030227: the first multiwavelength afterglow of an INTEGRAL GRB
• XMM-Newton and VLT observations of the afterglow of GRB040827
• GRB 051028: an intrinsically faint GRB at high redshift?
• GRB 040403: a faint X-ray rich Gamma-ray Burst discovered by INTEGRAL
• The INTEGRAL view of Gamma-Ray Bursts