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pro vyhledávání: '"Borgonovo L"'
A sample of 197 long BATSE GRBs is studied statistically. In the sample 11 variables, describing for any burst the time behavior of the spectra and other quantities, are collected. The application of the factor analysis on this sample shows that five
Externí odkaz:
http://arxiv.org/abs/0902.4610
We study statistically 197 long gamma-ray bursts, detected and measured in detail by the BATSE instrument of the Compton Gamma-Ray Observatory. In the sample 10 variables, describing for any burst the time behavior of the spectra and other quantities
Externí odkaz:
http://arxiv.org/abs/0811.1749
Publikováno v:
Astron.Astrophys. 490 (2008) 253-258
Aims. We investigate observations of the X-ray binary Cygnus X-1 with unusually high hardness and low flux. In particular, we study the characteristic frequencies seen in the PDS and the hardness-flux correlation within and between these observations
Externí odkaz:
http://arxiv.org/abs/0810.1107
Publikováno v:
Nuovo Cim.C28:295,2005
Principal component analysis is a statistical method, which lowers the number of important variables in a data set. The use of this method for the bursts' spectra and afterglows is discussed in this paper. The analysis indicates that three principal
Externí odkaz:
http://arxiv.org/abs/0705.0249
Publikováno v:
Astron.Astrophys.465:765,2007
Based on the analysis of a small sample of BATSE and Konus gamma-ray bursts (GRBs) with know redshift it has been reported that the width of the autocorrelation function (ACF) shows a remarkable bimodal distribution in the rest-frame of the source. H
Externí odkaz:
http://arxiv.org/abs/astro-ph/0701920
Autor:
Meszaros, A., Bagoly, Z., Klose, S., Ryde, F., Larsson, S., Balazs, L. G., Horvath, I., Borgonovo, L.
Publikováno v:
Nuovo Cim.C28:311,2005
The origin of dark bursts - i.e. that have no observed afterglows in X-ray, optical/NIR and radio ranges - is unclear yet. Different possibilities - instrumental biases, very high redshifts, extinction in the host galaxies - are discussed and shown t
Externí odkaz:
http://arxiv.org/abs/astro-ph/0701905
Autor:
Borgonovo, L., Bjornsson, C. -I.
Publikováno v:
Astrophys.J.652:1423-1435,2006
The statistical properties of a complete, flux limited sample of 197 long gamma--ray bursts (GRBs) detected by BATSE are studied. In order to bring forth their main characteristics, care was taken to define a representative set of ten parameters. A m
Externí odkaz:
http://arxiv.org/abs/astro-ph/0606487
Publikováno v:
Astron.Astrophys. 452 (2006) 975-984
Building on results from previous studies of Cygnus~X-1, we analyze Rossi X-ray Timing Explorer (RXTE) data taken when the source was in the soft and transitional spectral states. We look at the power spectrum in the 0.01 -- 50 Hz range, using a mode
Externí odkaz:
http://arxiv.org/abs/astro-ph/0603307
Publikováno v:
Astron.Astrophys. 438 (2005) 999
Analyzing the archival data from the Rossi X-ray Timing Explorer (RXTE), we study the power density spectra (PDS) of Cygnus X-1 from 1996 to 2003 in the frequency range of 0.01 - 25 Hz. With our model we are able to track the evolution of the Lorentz
Externí odkaz:
http://arxiv.org/abs/astro-ph/0504446
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