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The prompt-afterglow connection in gamma-ray bursts: a comprehensive statistical analysis of swift x-ray light-curves
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Gehrels, Neil Mangano, V. Guidorzi, C. Moretti, A. Nousek, J. Perri, M. Stafford, M. Osborne, J. P. Bernardini, M. G. Capalbi, M. Romano, P. Page, K. L. Margutti, R. Angelini, Lorella Pasotti, F. Chincarini, G. Burrows, D. N. Zaninoni, E. Kennea, J. Sbarufatti, B. Stamatikos, Michael Evans, P. A. Racusin, Judith Lea |
| Copyright Year | 2012 |
| Description | We present a comprehensive statistical analysis of Swift X-ray light-curves of Gamma- Ray Bursts (GRBs) collecting data from more than 650 GRBs discovered by Swift and other facilities. The unprecedented sample size allows us to constrain the rest-frame X-ray properties of GRBs from a statistical perspective, with particular reference to intrinsic time scales and the energetics of the different light-curve phases in a common rest-frame 0.3-30 keV energy band. Temporal variability episodes are also studied and their properties constrained. Two fundamental questions drive this effort: i) Does the X-ray emission retain any kind of "memory" of the prompt γ-ray phase? ii) Where is the dividing line between long and short GRB X-ray properties? We show that short GRBs decay faster, are less luminous and less energetic than long GRBs in the X-rays, but are interestingly characterized by similar intrinsic absorption. We furthermore reveal the existence of a number of statistically significant relations that link the X-ray to prompt γ-ray parameters in long GRBs; short GRBs are outliers of the majority of these 2-parameter relations. However and more importantly, we report on the existence of a universal 3-parameter scaling that links the X-ray and the γ-ray energy to the prompt spectral peak energy of both long and short GRBs: E(sub X,iso)â E(sup 1.00+/-0.06)(sub γ,iso) /E(sup 0.60+/-0.10)(sub pk). |
| File Size | 533422 |
| Page Count | 15 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20140005252 |
| Archival Resource Key | ark:/13960/t3324xt15 |
| Language | English |
| Publisher Date | 2012-01-10 |
| Access Restriction | Open |
| Subject Keyword | Gamma-ray Bursts Prompt-afterglow Connection Comprehensive Red Shift X Rays Statistical Analysis Afterglows Spectrum Analysis Luminosity Data Processing Light Curve Gamma Ray Bursts Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
