- ID:
- ivo://CDS.VizieR/J/ApJ/616/1072
- Title:
- The GUSBAD catalog of gamma-ray bursts
- Short Name:
- J/ApJ/616/1072
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The GUSBAD catalog of gamma-ray bursts (GRBs) is based on archival BATSE DISCLA data covering the full 9.1yr of the Compton Gamma Ray Observatory mission. The catalog contains 2207 GRBs, including 589 bursts not listed in the Current BATSE Burst Catalog (see Cat. <IX/20>). The GUSBAD (Gamma-ray bursts Uniformly Selected from BATSE Archival Data) catalog is uniform in the sense that the detection criteria are the same throughout, and the properties given in the catalog are available for every burst. The detection and derivation of the properties of the GRBs were carried out automatically. This makes the GUSBAD catalog especially suitable for statistical work and simulations, such as that used in the derivation of V/V_max_. We briefly touch upon a potential problem in defining a GRB duration that is physically meaningful.
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- ID:
- ivo://CDS.VizieR/J/ApJS/196/1
- Title:
- The IPN supplement to the BATSE 5B catalog
- Short Name:
- J/ApJS/196/1
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present Interplanetary Network localization information for 343 gamma-ray bursts observed by the Burst and Transient Source Experiment (BATSE) between the end of the 4th BATSE catalog and the end of the Compton Gamma-Ray Observatory (CGRO) mission, obtained by analyzing the arrival times of these bursts at the Ulysses, Near Earth Asteroid Rendezvous (NEAR), and CGRO spacecraft. For any given burst observed by CGRO and one other spacecraft, arrival time analysis (or "triangulation") results in an annulus of possible arrival directions whose half-width varies between 11 arcsec and 21{deg}, depending on the intensity, time history, and arrival direction of the burst, as well as the distance between the spacecraft. This annulus generally intersects the BATSE error circle, resulting in an average reduction of the area of a factor of 20. When all three spacecraft observe a burst, the result is an error box whose area varies between 1 and 48000arcmin^2^, resulting in an average reduction of the BATSE error circle area of a factor of 87.
- ID:
- ivo://CDS.VizieR/J/ApJS/197/34
- Title:
- The IPN supplement to the HETE-2 GRB catalog
- Short Name:
- J/ApJS/197/34
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Between 2000 November and 2006 May, one or more spacecraft of the interplanetary network (IPN) detected 226 cosmic gamma-ray bursts that were also detected by the French Gamma-Ray Telescope experiment on board the High Energy Transient Experiment 2 spacecraft. During this period, the IPN consisted of up to nine spacecraft, and using triangulation, the localizations of 157 bursts were obtained. We present the IPN localization data on these events.
284. The 2LAC catalog
- ID:
- ivo://CDS.VizieR/J/ApJ/743/171
- Title:
- The 2LAC catalog
- Short Name:
- J/ApJ/743/171
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The second catalog of active galactic nuclei (AGNs) detected by the Fermi Large Area Telescope (LAT) in two years of scientific operation is presented. The second LAT AGN catalog (2LAC) includes 1017 {gamma}-ray sources located at high Galactic latitudes (|b|>10{deg}) that are detected with a test statistic (TS) greater than 25 and associated statistically with AGNs. However, some of these are affected by analysis issues and some are associated with multiple AGNs. Consequently, we define a Clean Sample which includes 886 AGNs, comprising 395 BL Lacertae objects (BL Lac objects), 310 flat-spectrum radio quasars (FSRQs), 157 candidate blazars of unknown type (i.e., with broadband blazar characteristics but with no optical spectral measurement yet), 8 misaligned AGNs, 4 narrow-line Seyfert 1 (NLS1s), 10 AGNs of other types, and 2 starburst galaxies. Where possible, the blazars have been further classified based on their spectral energy distributions (SEDs) as archival radio, optical, and X-ray data permit. While almost all FSRQs have a synchrotron-peak frequency <10^14^Hz, about half of the BL Lac objects have a synchrotron-peak frequency >10^15^Hz. The 2LAC represents a significant improvement relative to the first LAT AGN catalog (1LAC), with 52% more associated sources. The full characterization of the newly detected sources will require more broadband data. Various properties, such as {gamma}-ray fluxes and photon power-law spectral indices, redshifts, {gamma}-ray luminosities, variability, and archival radio luminosities and their correlations are presented and discussed for the different blazar classes. The general trends observed in 1LAC are confirmed.
- ID:
- ivo://CDS.VizieR/J/A+A/588/A141
- Title:
- The MWA view of Fermi blazars
- Short Name:
- J/A+A/588/A141
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Low-frequency radio arrays are opening a new window for the study of the sky, both to study new phenomena and to better characterize known source classes. Being flat-spectrum sources, blazars are so far poorly studied at low radio frequencies. We characterize the spectral properties of the blazar population at low radio frequency, compare the radio and high-energy properties of the gamma-ray blazar population, and search for radio counterparts of unidentified gamma-ray sources. We cross-correlated the 6100-deg^2^ Murchison Widefield Array Commissioning Survey catalogue with the Roma blazar catalogue, the third catalogue of active galactic nuclei detected by Fermi-LAT, and the unidentified members of the entire third catalogue of gamma-ray sources detected by Fermi-LAT. When available, we also added high-frequency radio data from the Australia Telescope 20GHz catalogue.
- ID:
- ivo://CDS.VizieR/J/ApJS/101/259
- Title:
- The second EGRET catalog
- Short Name:
- J/ApJS/101/259
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The second catalog of high-energy gamma-ray observations from the Energetic Gamma Ray Experiment Telescope (EGRET) on the Compton Gamma Ray Observatory includes data from Phase 1 (1991 April - 1992 November) and Phase 2 (1992 November - 1993 September) of the mission. In addition to including more data than the first EGRET catalog (1994ApJS...94..551F), this catalog uses an improved model of the diffuse galactic gamma radiation. The 129 sources in the catalog include one solar flare bright enough to be detected as a source, the Large Magellanic Cloud, five pulsars, 40 high-confidence identifications of active galactic nuclei, 11 AGN identifications with lower confidence, and 71 sources not yet identified with known objects. Also included a re approximate upper limits for gamma-ray sources at any point in the sky and information about sources listed in the first EGRET catalog but not appearing in this one. The main catalog (table 4) was revised slightly after the preprint was made.
- ID:
- ivo://CDS.VizieR/J/ApJS/211/13
- Title:
- The second Fermi/GBM GRB catalog (4yr)
- Short Name:
- J/ApJS/211/13
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This is the second of a series of catalogs of gamma-ray bursts (GRBs) observed with the Fermi Gamma-ray Burst Monitor (GBM). It extends the first two-year catalog by two more years, resulting in an overall list of 953 GBM triggered GRBs. The intention of the GBM GRB catalog is to provide information to the community on the most important observables of the GBM detected GRBs. For each GRB the location and main characteristics of the prompt emission, the duration, peak flux and fluence are derived. The latter two quantities are calculated for the 50-300keV energy band, where the maximum energy release of GRBs in the instrument reference system is observed and also for a broader energy band from 10-1000keV, exploiting the full energy range of GBMs low-energy detectors. Furthermore, information is given on the settings and modifications of the triggering criteria and exceptional operational conditions during years three and four in the mission. This second catalog is an official product of the Fermi GBM science team, and the data files containing the complete results are available from the High-Energy Astrophysics Science Archive Research Center.
- ID:
- ivo://CDS.VizieR/J/ApJS/222/5
- Title:
- The second Fermi-LAT >50GeV catalog (2FHL)
- Short Name:
- J/ApJS/222/5
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a catalog of sources detected above 50GeV by the Fermi-Large Area Telescope (LAT) in 80 months of data. The newly delivered Pass 8 event-level analysis allows the detection and characterization of sources in the 50GeV-2TeV energy range. In this energy band, Fermi-LAT has detected 360 sources, which constitute the second catalog of hard Fermi-LAT sources (2FHL). The improved angular resolution enables the precise localization of point sources (~1.7' radius at 68% C. L.) and the detection and characterization of spatially extended sources. We find that 86% of the sources can be associated with counterparts at other wavelengths, of which the majority (75%) are active galactic nuclei and the rest (11%) are Galactic sources. Only 25% of the 2FHL sources have been previously detected by Cherenkov telescopes, implying that the 2FHL provides a reservoir of candidates to be followed up at very high energies. This work closes the energy gap between the observations performed at GeV energies by Fermi-LAT on orbit and the observations performed at higher energies by Cherenkov telescopes from the ground.
- ID:
- ivo://CDS.VizieR/J/ApJS/224/10
- Title:
- The second Konus-Wind short GRB catalog
- Short Name:
- J/ApJS/224/10
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- In this catalog, we present the results of a systematic study of 295 short gamma-ray bursts (GRBs) detected by Konus-Wind (KW) from 1994 to 2010. From the temporal and spectral analyses of the sample, we provide the burst durations, the spectral lags, the results of spectral fits with three model functions, the total energy fluences, and the peak energy fluxes of the bursts. We discuss evidence found for an additional power-law spectral component and the presence of extended emission in a fraction of the KW short GRBs. Finally, we consider the results obtained in the context of the Type I (merger-origin)/Type II (collapsar-origin) classifications.
- ID:
- ivo://CDS.VizieR/J/ApJS/195/2
- Title:
- The second Swift BAT GRB catalog (BAT2)
- Short Name:
- J/ApJS/195/2
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the second Swift Burst Alert Telescope (BAT) catalog of gamma-ray bursts (GRBs), which contains 476 bursts detected by the BAT between 2004 December 19 and 2009 December 21. This catalog (hereafter the BAT2 catalog) presents burst trigger time, location, 90% error radius, duration, fluence, peak flux, time-averaged spectral parameters, and time-resolved spectral parameters measured by the BAT. In the correlation study of various observed parameters extracted from the BAT prompt emission data, we distinguish among long-duration GRBs (L-GRBs), short-duration GRBs (S-GRBs), and short-duration GRBs with extended emission (S-GRBs with E.E.) to investigate differences in the prompt emission properties. The fraction of L-GRBs, S-GRBs, and S-GRBs with E.E. in the catalog are 89%, 8%, and 2%, respectively. We compare the BAT prompt emission properties with the BATSE, BeppoSAX, and HETE-2 GRB samples. We also correlate the observed prompt emission properties with the redshifts for the GRBs with known redshift. The BAT T90 and T50 durations peak at 70s and 30s, respectively.
