A Decade of Gamma-Ray Bursts Observed by Fermi-LAT: The Second GRB Catalog

The Large Area Telescope (LAT) aboard the Fermi spacecraft routinely observes high-energy emission from gamma-ray bursts (GRBs). Here we present the second catalog of LAT-detected GRBs, covering the first 10 yr of operations, from 2008 to 2018 August 4. A total of 186 GRBs are found; of these, 91 sh...

Full description

Saved in:
Bibliographic Details
Published in:The Astrophysical journal 2019-06, Vol.878 (1), p.52
Main Authors: Axelsson, M., Bastieri, D., Bellazzini, R., Bhat, P. N., Blandford, R. D., Bonino, R., Bonnell, J., Bottacini, E., Bregeon, J., Bruel, P., Buehler, R., Cameron, R. A., Caraveo, P. A., Cavazzuti, E., Chen, S., Cheung, C. C., Chiaro, G., Costantin, D., Crnogorcevic, M., Cutini, S., Dainotti, M., D'Ammando, F., Palma, F. de, Desai, A., Desiante, R., Venere, L. Di, Dirirsa, F. Fana, Franckowiak, A., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Giglietto, N., Giordano, F., Green, D., Grenier, I. A., Grove, J. E., Guiriec, S., Hays, E., Hewitt, J. W., Horan, D., Jóhannesson, G., Kocevski, D., Kuss, M., Latronico, L., Li, J., Longo, F., Lovellette, M. N., Lubrano, P., Maldera, S., Manfreda, A., Martí-Devesa, G., Mazziotta, M. N., Mereu, I., Meyer, M., Mirabal, N., Mitthumsiri, W., Mizuno, T., Monzani, M. E., Moretti, E., Moskalenko, I. V., Nuss, E., Ohno, M., Omodei, N., Orienti, M., Orlando, E., Palatiello, M., Paliya, V. S., Paneque, D., Persic, M., Pesce-Rollins, M., Petrosian, V., Piron, F., Poon, H., Porter, T. A., Principe, G., Racusin, J. L., Rainò, S., Rando, R., Razzaque, S., Reimer, A., Reimer, O., Reposeur, T., Ryde, F., Sgrò, C., Siskind, E. J., Sonbas, E., Spinelli, P., Suson, D. J., Tajima, H., Tak, D., Thayer, J. B., Troja, E., Valverde, J., Veres, P., Vianello, G., Yassine, M., Zhu, S., Zimmer, S.
Format: Article
Language:English
Subjects:
ASTRONOMY AND ASTROPHYSICS
Astrophysics
Emission
Energy
Fluence
Gamma ray bursts
Gamma rays
gamma-ray burst: general
Interplanetary spacecraft
methods: data analysis
Physics
Red shift
Spacecraft
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The Large Area Telescope (LAT) aboard the Fermi spacecraft routinely observes high-energy emission from gamma-ray bursts (GRBs). Here we present the second catalog of LAT-detected GRBs, covering the first 10 yr of operations, from 2008 to 2018 August 4. A total of 186 GRBs are found; of these, 91 show emission in the range 30-100 MeV (17 of which are seen only in this band) and 169 are detected above 100 MeV. Most of these sources were discovered by other instruments (Fermi/GBM, Swift/BAT, AGILE, INTEGRAL) or reported by the Interplanetary Network (IPN); the LAT has independently triggered on four GRBs. This catalog presents the results for all 186 GRBs. We study onset, duration, and temporal properties of each GRB, as well as spectral characteristics in the 100 MeV-100 GeV energy range. Particular attention is given to the photons with the highest energy. Compared with the first LAT GRB catalog, our rate of detection is significantly improved. The results generally confirm the main findings of the first catalog: the LAT primarily detects the brightest GBM bursts, and the high-energy emission shows delayed onset as well as longer duration. However, in this work we find delays exceeding 1 ks and several GRBs with durations over 10 ks. Furthermore, the larger number of LAT detections shows that these GRBs not only cover the high-fluence range of GBM-detected GRBs but also sample lower fluences. In addition, the greater number of detected GRBs with redshift estimates allows us to study their properties in both the observer and rest frames. Comparison of the observational results with theoretical predictions reveals that no model is currently able to explain all results, highlighting the role of LAT observations in driving theoretical models.
ISSN:0004-637X
1538-4357
1538-4357
DOI:10.3847/1538-4357/ab1d4e