Abstract
AbstractGamma‐ray bursts (GRBs) can be divided into three groups: short‐, intermediate‐ and long‐duration bursts. While the progenitors of the short and long ones are relatively known, the progenitors of the intermediate‐duration bursts (IBs) are generally unknown. However, recent statistical studies suggest that they can be related to the long‐duration bursts. Another types of GRBs are the so‐called X‐ray flashes (XRFs) and X‐ray rich GRBs (XRRs). The former ones radiate more intensively in the X‐ray bands than common GRBs, but in the cases of XRFs the main component of the emission is produced entirely at X‐ray wavelengths. Also, the XRFs and IBs show some similarities regarding their prompt‐ and afterglow properties. In this work we investigate whether there is a difference between the global parameters of the X‐ray flashes and intermediate‐duration group of gamma‐ray bursts. The statistical tests do not show any significant discrepancy regarding most of the parameters, except the BAT photon index, which is only a consequence of the definition of the XRFs. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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