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

Ajello M, Arimoto M, Axelsson M, Baldini L, Barbiellini G, Bastieri D, Bellazzini R, Bhat PN, Bissaldi E, Blandford RD, Bonino R, Bonnell J, Bottacini E, Bregeon J, Bruel P, Buehler R, Cameron RA, Caputo R, Caraveo PA, Cavazzuti E, Chen S, Cheung CC, Chiaro G, Ciprini S, Costantin D, Crnogorcevic M, Cutini S, Dainotti M, D'Ammando F, Luque PDLT, De Palma F, Desai A, Desiante R, Di Lalla N, Di Venere L, Dirirsa FF, Fegan SJ, Franckowiak A, Fukazawa Y, Funk S, Fusco P, Gargano F, Gasparrini D, Giglietto N, Giordano F, Giroletti M, Green D, Grenier IA, Grove JE, Guiriec S, Hays E, Hewitt JW, Horan D, Johannesson G, Kocevski D, Kuss M, Latronico L, Li J, Longo F, Loparco F, Lovellette MN, Lubrano P, Maldera S, Manfreda A, Martí-Devesa G, Mazziotta MN, Mereu , Meyer M, Michelson PF, Mirabal N, Mitthumsiri W, Mizuno T, Monzani ME, Moretti E, Morselli A, Moskalenko I, Negro M, Nuss E, Ohno M, Omodei N, Orienti M, Orlando E, Palatiello M, Paliya VS, Paneque D, Persic M, Pesce-Rollins M, Petrosian , Piron F, Poolakkil S, Poon H, Porter TA, Principe G, Racusin JL, Raino S, Rando R, Razzano M, Razzaque S, Reimer A, Reimer O, Reposeur T, Ryde F, Serini D, Sgro C, Siskind EJ, Sonbas E, Spandre G, Spinelli P, Suson DJ, Tajima H, Takahashi M, Tak D, Thayer JB, Torres DF, Troja E, Valverde J, Veres P, Vianello G, Von Kienlin A, Wood K, Yassine M, Zhu S, Zimmer S (2019)

Publication Type: Journal article

Publication year: 2019


Book Volume: 878

Journal Issue: 1

DOI: 10.3847/1538-4357/ab1d4e


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.

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Involved external institutions

Clemson University US United States (USA) (US) Kanazawa University / 金沢大学 JP Japan (JP) Stockholm University / Stockholms universitet SE Sweden (SE) University of Pisa / Università di Pisa (UniPi) IT Italy (IT) National Institute for Nuclear Physics / Istituto Nazionale di Fisica Nucleare (INFN) IT Italy (IT) University of Alabama in Huntsville (UAH) US United States (USA) (US) University of Bari Aldo Moro / Università degli Studi di Bari Aldo Moro IT Italy (IT) University of Montpellier / Université Montpellier FR France (FR) Stanford University US United States (USA) (US) National Aeronautics and Space Administration (NASA) US United States (USA) (US) École Polytechnique - Université Paris-Saclay FR France (FR) Deutsches Elektronen-Synchrotron DESY DE Germany (DE) National Institute for Astrophysics / Istituto Nazionale Astrofisica (INAF) IT Italy (IT) Italian Space Agency / Agenzia Spaziale Italiana (ASI) IT Italy (IT) U.S. Naval Research Laboratory US United States (USA) (US) University of Padua / Universita degli Studi di Padova IT Italy (IT) University of Maryland US United States (USA) (US) University of Johannesburg ZA South Africa (ZA) Hiroshima University / 広島大学 JP Japan (JP) Max-Planck-Institut für Physik (Werner-Heisenberg-Institut, MPP) / Max Planck Institute for Physics DE Germany (DE) University of North Florida (UNF) US United States (USA) (US) University of Iceland (UI) / Háskóli Íslands IS Iceland (IS) Leopold-Franzens-Universität Innsbruck / University of Innsbruck AT Austria (AT) Università degli Studi di Perugia IT Italy (IT) Mahidol University / มหาวิทยาลัยมหิดล TH Thailand (TH) Autonomous University of Barcelona (UAB) / Universitat Autònoma de Barcelona ES Spain (ES) Université Bordeaux 1, Sciences et Technologies FR France (FR) AlbaNova University Centre / Kungliga Tekniska Högskolan AlbaNova Universitetscentrum SE Sweden (SE) NYCB Real-Time Computing, Inc. US United States (USA) (US) Adıyaman Üniversitesi TR Turkey (TR) Purdue University Northwest / Purdue University Calumet US United States (USA) (US) Institute of Space Sciences (IEEC-CSIC) ES Spain (ES) Max-Planck-Institut für extraterrestrische Physik (MPE) / Max Planck Institute for Extraterrestrial Physics DE Germany (DE) Praxis, Inc. US United States (USA) (US) Max Planck Institute for Gravitational Physics / Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut) DE Germany (DE)

How to cite


Ajello, M., Arimoto, M., Axelsson, M., Baldini, L., Barbiellini, G., Bastieri, D.,... Zimmer, S. (2019). A Decade of Gamma-Ray Bursts Observed by Fermi-LAT: The Second GRB Catalog. Astrophysical Journal, 878(1). https://doi.org/10.3847/1538-4357/ab1d4e


Ajello, M., et al. "A Decade of Gamma-Ray Bursts Observed by Fermi-LAT: The Second GRB Catalog." Astrophysical Journal 878.1 (2019).

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