Incremental Fermi Large Area Telescope Fourth Source Catalog

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dc.contributor.authorAbdollahi, S.
dc.contributor.authorAcero, F.
dc.contributor.authorBaldini, L.
dc.contributor.authorBallet, J.
dc.contributor.authorMirabal, Nestor
dc.contributor.authorNegro, Michela
dc.contributor.authorValverde, J.
dc.contributor.authoret al
dc.date.accessioned2022-03-04T19:32:01Z
dc.date.available2022-03-04T19:32:01Z
dc.date.issued2022-06-30
dc.descriptionAuthors: S. Abdollahi, F. Acero, L. Baldini, J. Ballet, D. Bastieri, , , R. Bellazzini, B. Berenji, A. Berretta, E. Bissaldi, , R. D. Blandford, E. Bloom, R. Bonino, , A. Brill, R. J. Britto, P. Bruel, T. H. Burnett, S. Buson, R. A. Cameron, R. Caputo, P. A. Caraveo, D. Castro, , S. Chaty, C. C. Cheung, G. Chiaro, N. Cibrario, S. Ciprini, , J. Coronado-Blazquez, ´ , , M. Crnogorcevic, S. Cutini, F. D’Ammando, S. De Gaetano, S. W. Digel, N. Di Lalla, F. Dirirsa, L. Di Venere, , A. Dom´ınguez, V. Fallah Ramazani, S. J. Fegan, E. C. Ferrara, , , A. Fiori, H. Fleischhack, , , A. Franckowiak, Y. Fukazawa, S. Funk, P. Fusco, , G. Galanti, V. Gammaldi, F. Gargano, S. Garrappa, D. Gasparrini, , F. Giacchino, , N. Giglietto, , F. Giordano, , M. Giroletti, T. Glanzman, D. Green, I. A. Grenier, M.-H. Grondin, L. Guillemot, , S. Guiriec, , M. Gustafsson, A. K. Harding, E. Hays, J.W. Hewitt, D. Horan, X. Hou, , , G. Johannesson, ´ , , C. Karwin, T. Kayanoki, M. Kerr, M. Kuss, D. Landriu, S. Larsson, , , L. Latronico, M. Lemoine-Goumard, J. Li, I. Liodakis, F. Longo, , F. Loparco, , B. Lott, P. Lubrano, S. Maldera, D. Malyshev, A. Manfreda, G. Mart´ı-Devesa, M. N. Mazziotta, I.Mereu, , M. Meyer, P. F. Michelson, N. Mirabal, , W. Mitthumsiri, T. Mizuno, A. A. Moiseev, , M. E. Monzani, A. Morselli, I. V. Moskalenko, M. Negro, , E. Nuss, N. Omodei, M. Orienti, E. Orlando, , D. Paneque, Z. Pei, J. S. Perkins, M. Persic, , M. Pesce-Rollins, V. Petrosian, R. Pillera, , H. Poon, T. A. Porter, G. Principe, , , S. Raino, ` , , R. Rando, , , B. Rani, , , M. Razzano, S. Razzaque, A. Reimer, , O. Reimer, T. Reposeur, M. Sanchez-Conde, ´ , , P. M. Saz Parkinson, , , L. Scotton, D. Serini, C. Sgro, ` , E. J. Siskind, D. A. Smith, , G. Spandre, P. Spinelli, , K. Sueoka, D. J. Suson, H. Tajima, , D. Tak, , J. B. Thayer, D. J. Thompson, D. F. Torres, , , E. Troja,, J. Valverde,, K. Wood, and G. Zaharijasen_US
dc.description.abstractWe present an incremental version (4FGL-DR3, for Data Release 3) of the fourth Fermi-LAT catalog of gamma-ray sources. Based on the first twelve years of science data in the energy range from 50 MeV to 1 TeV, it contains 6658 sources. The analysis improves on that used for the 4FGL catalog over eight years of data: more sources are fit with curved spectra, we introduce a more robust spectral parametrization for pulsars, and we extend the spectral points to 1 TeV. The spectral parameters, spectral energy distributions and associations are updated for all sources. Light curves are rebuilt for all sources with 1-year intervals (not 2-month intervals). Among the 5064 original 4FGL sources, 16 were deleted, 112 are formally below the detection threshold over 12 years (but are kept in the list), while 74 are newly associated, 10 have an improved association and seven associations were withdrawn. Pulsars are split explicitly between young and millisecond pulsars. Pulsars and binaries newly detected in LAT sources, as well as more than 100 newly classified blazars, are reported. We add three extended sources and 1607 new point sources, mostly just above the detection threshold, among which eight are considered identified and 699 have a plausible counterpart at other wavelengths. We discuss degree-scale residuals to the global sky model and clusters of soft unassociated point sources close to the Galactic plane, which are possibly related to limitations of the interstellar emission model and missing extended sources.en_US
dc.description.sponsorshipThe Fermi LAT Collaboration acknowledges generous ongoing support from a number of agencies and insti tutes that have supported both the development and the operation of the LAT as well as scientific data anal ysis. These include the National Aeronautics and Space Administration and the Department of Energy in the United States, the Commissariat `a l’Energie Atomique and the Centre National de la Recherche Scientifique / Institut National de Physique Nucl´eaire et de Physique des Particules in France, the Agenzia Spaziale Italiana and the Istituto Nazionale di Fisica Nucleare in Italy, the Ministry of Education, Culture, Sports, Science and Technology (MEXT), High Energy Accelerator Re search Organization (KEK) and Japan Aerospace Ex ploration Agency (JAXA) in Japan, and the K. A. Wal lenberg Foundation, the Swedish Research Council and the Swedish National Space Board in Sweden. Additional support for science analysis during the op erations phase is gratefully acknowledged from the Is tituto Nazionale di Astrofisica in Italy and the Cen tre National d’Etudes Spatiales in France. This work ´ performed in part under DOE Contract DE-AC02- 76SF00515. This work made extensive use of the ATNF pulsar cat alog16 (Manchester et al. 2005). This research has made use of the NASA/IPAC Extragalactic Database (NED) (2019) which is operated by the Jet Propulsion Labora tory, California Institute of Technology, under contract with the National Aeronautics and Space Administra tion, and of archival data, software and online services provided by the ASI Science Data Center (ASDC) op erated by the Italian Space Agency. We used the Mani toba SNR catalog (Ferrand & Safi-Harb 2012) to check recently published extended sources. We acknowledge the Einstein@Home project for providing new pulsar associations through the dedicated efforts of the Ein stein@Home volunteers. The Einstein@Home project is supported by the NSF award 1816904.en_US
dc.description.urihttps://iopscience.iop.org/article/10.3847/1538-4365/ac6751en_US
dc.format.extent24 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m2pien-wred
dc.identifier.citationAbdollahi, S. et al. "Incremental Fermi Large Area Telescope Fourth Source Catalog." The Astrophysical Journal Supplement Series, 260, no. 2 (2022 June 30). https://doi.org/10.3847/1538-4365/ac6751
dc.identifier.urihttps://doi.org/10.3847/1538-4365/ac6751
dc.identifier.urihttp://hdl.handle.net/11603/24342
dc.language.isoen_USen_US
dc.publisherAAS
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Center for Space Sciences and Technology
dc.relation.ispartofUMBC Faculty Collection
dc.relation.ispartofUMBC Physics Department
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.en_US
dc.rightsPublic Domain Mark 1.0*
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titleIncremental Fermi Large Area Telescope Fourth Source Catalogen_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0002-7021-5838en_US
dcterms.creatorhttps://orcid.org/0000-0002-6548-5622

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