- ID:
- ivo://CDS.VizieR/J/ApJS/154/585
- Title:
- BATSE earth occultation deep sample results
- Short Name:
- J/ApJS/154/585
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The Burst and Transient Source Experiment (BATSE), aboard the Compton Gamma Ray Observatory (CGRO), provided a record of the low-energy gamma-ray sky (~20-1000keV) between 1991 April and 2000 May (9.1yr). We performed a deep-sampling of 58 objects, plus a selection of 121 more objects, combining data from the entire 9.1yr BATSE data set. Source types considered were primarily accreting binaries, but a small number of representative active galaxies, X-ray-emitting stars, and supernova remnants were also included. The sample represents a compilation of sources monitored and/or discovered with BATSE and other high-energy instruments between 1991 and 2000, known sources taken from the HEAO 1 A-4 (1984ApJS...54..581L) and Macomb & Gehrels (1999ApJS..120..335M, Cat. <J/ApJS/120/335>) catalogs. Flux data for the deep sample are presented in four energy bands: 2040, 4070, 70160, and 160430keV. The limiting average flux level (9.1yr) for the sample varies from 3.5 to 20mcrab (5{sigma}) between 20 and 430keV, depending on systematic error, which in turn is primarily dependent on the sky location.
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- ID:
- ivo://CDS.VizieR/J/ApJS/126/19
- Title:
- BATSE gamma-ray burst spectral catalog. I.
- Short Name:
- J/ApJS/126/19
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This is the first in a series of gamma-ray burst spectroscopy catalogs from the Burst and Transient Source Experiment (BATSE) on the Compton Gamma Ray Observatory, each covering a different aspect of burst phenomenology. In this paper, we present time sequences of spectral fit parameters for 156 bursts selected for either their high peak flux or fluence. All bursts have at least eight spectra in excess of 45{sigma} above background and span burst durations from 1.66 to 278s. Individual spectral accumulations are typically 128ms long at the peak of the brightest events but can be as short as 16ms, depending on the type of data selected. We have used mostly high energy resolution data from the Large Area Detectors, covering an energy range of typically 28-1800keV. The spectral model chosen is from a small empirically determined set of functions, such as the well-known "GRB" function, that best fits the time-averaged burst spectra. Thus, there are generally three spectral shape parameters available for each of the 5500 total spectra: a low-energy power-law index, a characteristic break energy, and possibly a high-energy power-law index. We present the distributions of the observed sets of these parameters and comment on their implications.
- ID:
- ivo://CDS.VizieR/J/ApJ/740/104
- Title:
- BATSE GRB pulse catalog - preliminary data
- Short Name:
- J/ApJ/740/104
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We demonstrate that distinguishable gamma-ray burst (GRB) pulses exhibit similar behaviors as evidenced by correlations among the observable pulse properties of duration, peak luminosity, fluence, spectral hardness, energy-dependent lag, and asymmetry. Long and Short burst pulses exhibit these behaviors, suggesting that a similar process is responsible for producing all GRB pulses. That these properties correlate in the observer's frame indicates that intrinsic correlations are strong enough to not be diluted into insignificance by the dispersion in distances and redshift. We show how all correlated pulse characteristics can be explained by hard-to-soft pulse evolution, and we demonstrate that "intensity tracking" pulses not having these properties are not single pulses; they instead appear to be composed of two or more overlapping hard-to-soft pulses. In order to better understand pulse characteristics, we recognize that hard-to-soft evolution provides a more accurate definition of a pulse than its intensity variation. This realization, coupled with the observation that pulses begin near-simultaneously across a wide range of energies, leads us to conclude that the observed pulse emission represents the energy decay resulting from an initial injection, and that one simple and as yet unspecified physical mechanism is likely to be responsible for all GRB pulses regardless of the environment in which they form and, if GRBs originate from different progenitors, then of the progenitors that supply them with energy.
- ID:
- ivo://CDS.VizieR/J/ApJS/127/79
- Title:
- BATSE occultation catalog of Gamma-Ray sources
- Short Name:
- J/ApJS/127/79
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Using the powerful Earth-occultation technique, long-term, nearly continuous monitoring of the entire low-energy gamma-ray sky is now possible with the advent of BATSE, the Burst and Transient Source Experiment on board the Compton Gamma Ray Observatory (CGRO). In this paper, we present a catalog of 34 moderately strong gamma-ray sources measured by BATSE. It consists of 0.03 - 1.8 MeV photon spectra averaged over weeks and months, and light curves of the 35 - 200 keV flux, with 1 day resolution, covering the first three phases of the CGRO mission (1991 May through 1994 October). This database contains a complete record of {~}1200 daily source count rates in 14 energy channels along with the corresponding Poisson and systematic errors.
- ID:
- ivo://CDS.VizieR/J/ApJ/855/101
- Title:
- BATSE TTE GRB pulse catalog
- Short Name:
- J/ApJ/855/101
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We analyze pulse properties of short gamma-ray bursts (GRBs) from a new catalog containing 434 pulses from 387 BATSE time-tagged event (TTE) GRBs. Short GRB pulses exhibit correlated properties of duration, fluence, hardness, and amplitude, and they evolve hard to soft while undergoing similar triple- peaked light curves similar to those found in long/intermediate bursts. We classify pulse light curves using their temporal complexities, demonstrating that short GRB pulses exhibit a range of complexities from smooth to highly variable. Most of the bright, hard, chaotic emission seen in complex pulses seems to represent a separate highly variable emission component. Unlike long/intermediate bursts, as many as 90% of short GRBs are single-pulsed. However, emission in short multipulsed bursts is coupled such that the first pulse's duration is a predictor of both the interpulse separation and subsequent pulse durations. These results strongly support the idea that external shocks produce the prompt emission seen in short GRBs. The similarities between the triple-peaked structures and spectral evolution of long, short, and intermediate GRBs then suggests that external shocks are responsible for the prompt emission observed in all GRB classes. In addition to these findings, we identify a new type of gamma-ray transient in which peak amplitudes occur at the end of the burst rather than at earlier times. Some of these "crescendo" bursts are preceded by rapid-fire "staccato" pulses, whereas the remaining are preceded by a variable episode that could be unresolved staccato pulses.
- ID:
- ivo://CDS.VizieR/J/ApJ/886/20
- Title:
- Bayesian time-resolved spectra of Fermi GBM pulses
- Short Name:
- J/ApJ/886/20
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We performed time-resolved spectroscopy on a sample of 38 single pulses from 37 gamma-ray bursts detected by the Fermi/Gamma-ray Burst Monitor during the first 9yr of its mission. For the first time a fully Bayesian approach is applied. A total of 577 spectra are obtained and their properties studied using two empirical photon models, namely the cutoff power law (CPL) and Band model. We present the obtained parameter distributions, spectral evolution properties, and parameter relations. We also provide the result files containing this information for usage in further studies. It is found that the CPL model is the preferred model, based on the deviance information criterion and the fact that it consistently provides constrained posterior density maps. In contrast to previous works, the high-energy power-law index of the Band model, {beta}, has in general a lower value for the single pulses in this work. In particular, we investigate the individual spectrum in each pulse, that has the largest value of the low-energy spectral indexes, {alpha}. For these 38 spectra, we find that 60% of the {alpha} values are larger than -2/3, and thus incompatible with synchrotron emission. Finally, we find that the parameter relations show a variety of behaviors. Most noteworthy is the fact that the relation between {alpha} and the energy flux is similar for most of the pulses, independent of any evolution of the other parameters.
- ID:
- ivo://CDS.VizieR/J/A+A/455/813
- Title:
- BeppoSAX catalog of GRB X-ray afterglows
- Short Name:
- J/A+A/455/813
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the catalog of X-ray afterglow observed by BeppoSAX from the launch of the satellite to the end of the mission. Thirty-three X-ray afterglows out of 39 observations were securely identified based on their fading behavior. We have extracted the continuum parameters (decay index, spectral index, flux, absorption) for all available afterglows. We point out a possible correlation between the X-ray afterglow luminosity and the energy emitted during the prompt gamma-ray event.
- ID:
- ivo://CDS.VizieR/J/A+A/473/347
- Title:
- BeppoSAX complete catalogue of GRBs
- Short Name:
- J/A+A/473/347
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the complete on-line catalogue of gamma-ray bursts observed by the two Wide Field Cameras on board BeppoSAX in the period 1996-2002. Our aim is to provide the community with the largest published data set of GRB's prompt emission X-ray light curves and other useful data.
- ID:
- ivo://CDS.VizieR/J/MNRAS/431/3608
- Title:
- BeppoSAX/GRBM and Fermi/GBM long GRBs
- Short Name:
- J/MNRAS/431/3608
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- 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^-{alpha}^, with {alpha} 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.
- ID:
- ivo://CDS.VizieR/J/ApJS/180/192
- Title:
- BeppoSAX/GRBM {gamma}-ray Burst Catalog
- Short Name:
- J/ApJS/180/192
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This is the catalog of Gamma-Ray Bursts (GRBs) detected with the Gamma Ray Burst Monitor aboard the BeppoSAX satellite. It includes 1082 GRBs with 40-700keV fluences in the range from 1.3x10-7 to 4.5x10-4erg/cm^2^, and 40-700keV peak fluxes from 3.7x10-8 to 7.0x10-5erg/cm^2^/s. We report in the catalog some relevant parameters of each GRB.
