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Systematic Effects on Duration Measurements of Gamma-Ray Bursts

1996; IOP Publishing; Volume: 463; Linguagem: Inglês

10.1086/177272

1538-4357

T. M. Koshut, W. S. Pačiesas, C. Kouveliotou, J. van Paradijs, Geoffrey N. Pendleton, G. J. Fishman, Charles A. Meegan,

Advanced Data Processing Techniques

view Abstract Citations (90) References (20) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Systematic Effects on Duration Measurements of Gamma-Ray Bursts Koshut, Thomas M. ; Paciesas, William S. ; Kouveliotou, Chryssa ; van Paradijs, Jan ; Pendleton, Geoffrey N. ; Fishman, Gerald J. ; Meegan, Charles A. Abstract The parameters T_90_ and T_50_ have recently been introduced as a measurement of the duration of gamma-ray bursts. We present here a description of the method of measuring T_90_ and T_50_ and its application to gamma-ray bursts observed with the Burst and Transient Source Experiment (BATSE) onboard the Compton Gamma-Ray Observatory (CGRO). We use simulated as well as observed time profiles to address some of the possible systematic effects affecting individual T_90_ (T_50_) measurements. We show that these systematic effects do not mimic those effects that would result from time dilation if the burst sources are at distances of several Gpc. We discuss the impact of these systematic effects on the T_90_ (T_50_) distributions for the gamma-ray bursts observed with BATSE. We distinguish between various types of T_90_ (T_50_) distributions, and discuss the ways in which distributions observed with different experiments can vary, even though the measurements for commonly observed bursts may be the same. We then discuss the distributions observed with BATSE and compare them to those observed with other experiments. Publication: The Astrophysical Journal Pub Date: June 1996 DOI: 10.1086/177272 Bibcode: 1996ApJ...463..570K Keywords: GAMMA RAYS: BURSTS full text sources ADS | data products SIMBAD (12) NED (12) HEASARC (1)