J/MNRAS/431/3608    BeppoSAX/GRBM and Fermi/GBM long GRBs      (Dichiara+, 2013)

Average power density spectrum of long GRBs detected with BeppoSAX/GRBM and with Fermi/GBM. Dichiara S., Guidorzi C., Amati L., Frontera F. <Mon. Not. R. Astron. Soc., 431, 3608-3617 (2013)> =2013MNRAS.431.3608D 2013MNRAS.431.3608D
ADC_Keywords: Gamma rays Keywords: accretion, accretion discs - turbulence; time - gamma-ray burst: general Abstract: From past experiments the average power density spectrum (PDS) of gamma-ray bursts (GRBs) with unknown redshift was found to be modelled from 0.01 to 1Hz with a power law, f, with α broadly consistent with 5/3. Recent analysis of the Swift/Burst Alert Telescope (BAT) catalogue showed analogous results in the 15-150keV band. We carried out the same analysis on the bright GRBs detected by BeppoSAX/Gamma-ray Burst Monitor (GRBM) and Fermi/Gamma-ray Burst Monitor (GBM). The BeppoSAX/GRBM data, in the energy range 40-700keV and with 7.8 and 0.5ms time resolutions, allowed us to explore for the first time the average PDS at very high frequencies (up to 1kHz) and reveal a break around 1-2Hz, previously found in Compton Gamma Ray Observatory/Burst and Transient Source Experiment data. The Fermi/GBM data, in the energy band 8-1000keV, allowed us to explore for the first time the average PDS within a broad energy range. Our results confirm and extend the energy dependence of the PDS slope, according to which harder photons have shallower PDS. Description: We initially started with 829 GRBs detected and covered by GBM from 2008 July to 2011 December. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 44 205 *Time and Peak count rate. Fermi/GBM full sample including 205 GRBs table2.dat 26 205 White noise level (Leahy normalization) for the full Fermi sample table3.dat 41 42 *Time and Peak count rate. BeppoSAX/GRBM HR (high resolution) sample including 42 GRBs table4.dat 27 42 *White noise level (Leahy normalization) for the BeppoSAX HR sample. table5.dat 27 21 *White noise level (Leahy normalization) for the BeppoSAX Very High Resolution (VHR) sample -------------------------------------------------------------------------------- Note on table1.dat and table3.dat: The PDS is calculated in the time interval reported. Note on table4.dat: related to the sub-sample of 42 GRBs detected by BeppoSAX/GRBM with 7.8ms time resolution. Note on table5.dat: related to the sub-sample of 25 GRBs detected by BeppoSAX/GRBM with 0.5ms time resolution. -------------------------------------------------------------------------------- See also: J/ApJS/180/192 : BeppoSAX/GRBM γ-ray Burst Catalog (Frontera+, 2009) J/ApJS/211/13 : The second Fermi/GBM GRB catalog (4yr) (von Kienlin+, 2014) Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 9 I09 --- Trigger Trigger number 11- 17 F7.2 s tstart Start time (1) 19- 24 F6.2 s tstop End time (1) 26- 32 F7.2 ct/s Prate Peak rate 34- 38 F5.2 ct/s e_Prate rms uncertainty on Prate 40- 44 F5.1 s T90 Burst T90 duration -------------------------------------------------------------------------------- Note (1): time is referred to the Fermi/GBM trigger time -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 9 I09 --- Trigger Trigger number 10 A1 --- n_

[a] White noise level at f>4Hz (too low statistic at f>6Hz) 17- 20 F4.2 ---

? White noise level (mean power) at f>6Hz (2) 23- 26 F4.2 --- e_

? rms 1σ uncertainty on

-------------------------------------------------------------------------------- Note (2): The mean value of this sample is 1.99±0.02. -------------------------------------------------------------------------------- Byte-by-byte Description of file: table3.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 7 A7 --- GRB GRB name 10- 14 F5.2 s tstart Start time (1) 16- 20 F5.2 s tstop End time (1) 23- 28 F6.2 ct/s Prate Peak rate 30- 34 F5.2 ct/s e_Prate rms uncertainty on Prate 36- 41 F6.2 s T90 Burst T90 duration -------------------------------------------------------------------------------- Note (1): referred to the BeppoSAX/GRBM trigger time. -------------------------------------------------------------------------------- Byte-by-byte Description of file: table4.dat table5.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 7 A7 --- GRB GRB name 9- 12 F4.2 ---

30 White noise level at f>30Hz 14- 17 F4.2 --- e_

30 rms 1σ uncertainty on

30 19- 22 F4.2 ---

50 White noise level at f>50Hz 24- 27 F4.2 --- e_

50 rms 1σ uncertainty on

50 -------------------------------------------------------------------------------- History: From electronic version of the journal


(End) Patricia Vannier [CDS] 18-Jun-2014
The document above follows the rules of the Standard Description for Astronomical Catalogues; from this documentation it is possible to generate f77 program to load files into arrays or line by line