The prompt to late-time multiwavelength analysis of GRB 060210

• Published in: arXiv.org 2007-03
• Main Authors: Curran, P A, A J van der Horst, Beardmore, A P, Page, K L, Rol, E, Melandri, A, Steele, I A, Mundell, C G, Gomboc, A, O'Brien, P T, Bersier, D F, Bode, M F, Carter, D, Guidorzi, C, Hill, J E, Hurkett, C P, Kobayashi, S, Monfardini, A, Mottram, C J, Smith, R J, R A M J Wijers, Willingale, R
• Format: Article
• Language: English
• Subjects: Biological evolution; Breaking; Collimation; Energy distribution; Gamma ray bursts; Gamma rays; Light curve; Photometry; Power law; X-rays
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.0701087

We present our analysis of the multiwavelength photometric & spectroscopic observations of GRB 060210 and discuss the results in the overall context of current GRB models. All available optical data underwent a simultaneous temporal fit, while X-ray and gamma-ray observations were analysed temporally & spectrally. The results were compared to each other and to possible GRB models. The X-ray afterglow is best described by a smoothly broken power-law with a break at 7.4 hours. The late optical afterglow has a well constrained single power-law index which has a value between the two X-ray indices, though it does agree with a single power-law fit to the X-ray. An evolution of the hardness of the high-energy emission is demonstrated and we imply a minimum host extinction from a comparison of the extrapolated X-ray flux to that measured in the optical. We find that the flaring gamma-ray and X-ray emission is likely due to internal shocks while the flat optical light curve at that time is due to the external shock. The late afterglow is best explained by a cooling break between the optical and X-rays and continued central engine activity up to the time of the break. The required collimation corrected energy of ~ 2x10^52 erg, while at the high end of the known energy distribution, is not unprecedented.