FERMI AND SWIFT GAMMA-RAY BURST AFTERGLOW POPULATION STUDIES

Racusin J. L., Oates S. R., Schady P., Burrows D. N., DE PASQUALE M., Donato D., ...Daha Fazla

ASTROPHYSICAL JOURNAL, cilt.738, sa.2, 2011 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 738 Sayı: 2
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1088/0004-637x/738/2/138
  • Dergi Adı: ASTROPHYSICAL JOURNAL
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: gamma-ray burst: general, gamma rays: general, X-rays: bursts, LARGE-AREA TELESCOPE, HIGH-ENERGY EMISSION, INITIAL LORENTZ FACTOR, LIGHT CURVES, ALERT TELESCOPE, EXTERNAL SHOCK, GRB 080916C, SPECTRAL COMPONENTS, OPTICAL AFTERGLOWS, HOST GALAXIES
  • İstanbul Üniversitesi Adresli: Evet

Özet

The new and extreme population of gamma-ray bursts (GRBs) detected by the Fermi Large Area Telescope (LAT) shows several new features in high-energy gamma rays that are providing interesting and unexpected clues into GRB prompt and afterglow emission mechanisms. Over the last six years, it has been Swift that has provided the robust data set of UV/optical and X-ray afterglow observations that opened many windows into components of GRB emission structure. The relationship between the LAT-detected GRBs and the well-studied, fainter, and less energetic GRBs detected by the Swift Burst Alert Telescope is only beginning to be explored by multi-wavelength studies. We explore the large sample of GRBs detected by BAT only, BAT and the Fermi Gamma-ray Burst Monitor (GBM), and GBM and LAT, focusing on these samples separately in order to search for statistically significant differences between the populations, using only those GRBs with measured redshifts in order to physically characterize these objects. We disentangle which differences are instrumental selection effects versus intrinsic properties in order to better understand the nature of the special characteristics of the LAT bursts.