Cyclotron resonant scattering in the spectra of <i>γ</i>-ray bursts

J. C. L. Wang; D. Q. Lamb; T. J. Loredo; I. M. Wasserman; E. E. Salpeter; E. E. Fenimore; J. P. Conner; R. I. Epstein; R. W. Klebesadel; J. G. Laros; T. Murakami; J. Nishimura; A. Yoshida; I. Kondo

doi:10.1103/PhysRevLett.63.1550

Cyclotron resonant scattering in the spectra of γ-ray bursts

J. C. L. Wang, D. Q. Lamb, T. J. Loredo, I. M. Wasserman, E. E. Salpeter, E. E. Fenimore, J. P. Conner, R. I. Epstein, R. W. Klebesadel, J. G. Laros, T. Murakami, J. Nishimura, A. Yoshida, and I. Kondo

Phys. Rev. Lett. 63, 1550 – Published 9 October 1989

Abstract

Fits of theoretical spectra from Monte Carlo radiation-transfer calculations to dips at ≊20 and 40 keV in a spectrum of the ‘‘classical’’ γ-ray burst GB 880 205 give best-fit values and 68%-confidence intervals B=(1.71±0.07)× $10^{12}$ G, $N_{e}$ =(1.2±0.6)× $10^{21}$ electrons/ ${cm}^{2}$ , and μ=cosθ=0.31±0.05, where θ is the viewing angle relative to the field. Physical self-consistent fixes the temperature at $T_{C}$ ${= 5.3}_{- 0.2}^{+ 0.3}$ keV. These results suggest that this γ-ray burst and many others which exhibit a low-energy dip originate from strong magnetic neutron stars and are galactic in origin.

Received 1 May 1989

DOI:https://doi.org/10.1103/PhysRevLett.63.1550

Authors & Affiliations

J. C. L. Wang, D. Q. Lamb, T. J. Loredo, I. M. Wasserman, E. E. Salpeter, E. E. Fenimore, J. P. Conner, R. I. Epstein, R. W. Klebesadel, J. G. Laros, T. Murakami, J. Nishimura, A. Yoshida, and I. Kondo

Department of Astronomy and Astrophysics, University of Chicago, Chicago, Illinois 60637
Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637
Center for Radiophysics and Space Research, Cornell University, Ithaca, New York, 14853
Los Alamos National Laboratory, Los Alamos, New Mexico 87545
Institute of Space and Astronautical Science, Sagamihara, Kanagawa 229, Japan
Institute for Cosmic Ray Research, University of Tokyo, Tanashi, Tokyo 188, Japan