AN ANALYSIS OF<i>CHANDRA</i>DEEP FOLLOW-UP GAMMA-RAY BURSTS: IMPLICATIONS FOR OFF-AXIS JETS
Bin‐Bin ZhangCenter for Space Plasma and Aeronomic Research (CSPAR), University of Alabama in Huntsville, Huntsville, AL 35899, USAHendrik van EertenAlexander von Humboldt Fellow, Max-Planck Institute for Extraterrestrial Physics (MPE), Postfach 1312, D-85741 Garching, GermanyD. N. BurrowsDepartment of Astronomy and Astrophysics, The Pennsylvania State University, University Park, PA 16802, USA; [email protected]Geoffrey RyanCenter for Cosmology and Particle Physics, Physics Department, New York University, New York, NY 10003, USAN. GehrelsDepartment of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UKJ. L. RacusinNASA Goddard Space Flight Center, Greenbelt, MD 20771, USAE. TrojaCenter for Research and Exploration in Space Science and Technology (CRESST), Department of Astronomy, University of Maryland College Park, MD 20742-2421, USAAndrew MacFadyenCenter for Cosmology and Particle Physics, Physics Department, New York University, New York, NY 10003, USA
2015en
ABI
Аннотация
We present a sample of 27 gamma-ray bursts (GRBs) with detailed Swift light curves supplemented by late-time Chandra observations. To answer the missing jet-break problem in general, we develop a numerical-simulation-based model that can be directly fit to the data using Monte Carlo methods. Our numerical model takes into account all the factors that can shape a jet break: (i) lateral expansion, (ii) edge effects, and (iii) off-axis effects. Our results provide improved fits to the light curves and constraints on physical parameters. More importantly, our results suggest that off-axis effects are important and must be included in interpretations of GRB jet breaks.
Перевод пока недоступен
Идентификаторы
Цитирования и источники
Цитирований: 2Использованных источников: 0