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The Fermi/LAT telescope is an efficient blazar-detector in the MeV/GeV range. More than 1100 (900) blazars detected above 100 MeV (10 GeV) are clearly associated to BL Lacertae or Flat Spectrum Radio Quasar objects in the Fermi/LAT 3FGL…

High Energy Astrophysical Phenomena · Physics 2017-10-02 Julien Lefaucheur , Catherine Boisson , Paolo Goldoni , Santiago Pita

Analysis is presented on 15 months of data taken with the Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope for 11 non-blazar AGNs, including 7 FRI radio galaxies and 4 FRII radio sources consisting of 2 FRII radio galaxies…

High Energy Astrophysical Phenomena · Physics 2017-02-22 LAT Collaboration

We report on the analysis of 13 gamma-ray pulsars discovered in the Einstein@Home blind search survey using Fermi Large Area Telescope (LAT) Pass 8 data. The 13 new gamma-ray pulsars were discovered by searching 118 unassociated LAT sources…

The Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope (formerly GLAST), with its improved sensitivity relative to previous generation gamma-ray telescopes, is significantly increasing the number of known gamma-ray sources in…

Astrophysics of Galaxies · Physics 2019-08-13 P. M. Saz Parkinson , M. Dormody , M. Ziegler

Observations of pulsars with the Large Area Telescope (LAT) on the Fermi satellite have revolutionized our view of the gamma-ray pulsar population. For the first time, a large number of young gamma-ray pulsars have been discovered in blind…

High Energy Astrophysical Phenomena · Physics 2019-08-15 L. Guillemot

We present the results of our follow-up observation program of gamma-ray sources detected by the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope. 26 blazars and 39 sources unidentified at other wavelengths were…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 Mai Fujiwara , Yoshiki Matsuoka , Nobuyuki Ienaka

The Fermi source 4FGL J1848.7-0129 has been historically related to the globular cluster GLIMPSE-C01 since its very first detection. Although this association is widely accepted, as it appears in the most recent Fermi catalog, it deserves…

High Energy Astrophysical Phenomena · Physics 2022-12-07 Pedro L. Luque-Escamilla , Josep Martí , Enrique Mestre , Jorge A. Combi , Juan F. Albacete-Colombo

We present a study of 40 low-latitude unidentified 3EG gamma-ray sources which were found to be not positionally coincident with any known class of potential gamma-ray emitters in the Galaxy (Romero, Benaglia & Torres, 1999). We have…

With assistance of the identified/associated sources in the second Fermi Large Area Telescope (LAT) catalog, we analyze and resolve the spatial distribution and the distributions of the gamma-ray spectral and variability indices of the…

High Energy Astrophysical Phenomena · Physics 2015-06-15 Zhu Mao , Yun-Wei Yu

We present the first Fermi Large Area Telescope (LAT) low energy catalog (1FLE) of sources detected in the energy range 30 - 100 MeV. The COMPTEL telescope detected sources below 30 MeV, while catalogs released by the Fermi-LAT and EGRET…

High Energy Astrophysical Phenomena · Physics 2018-10-10 Giacomo Principe , Dmitry Malyshev , Jean Ballet , Stefan Funk

In a search with the Parkes radio telescope of 56 unidentified Fermi-LAT gamma-ray sources, we have detected 11 millisecond pulsars (MSPs), 10 of them discoveries, of which five were reported in Kerr et al. (2012). We did not detect radio…

Fast Radio Bursts (FRBs) are a mysterious flash phenomenon detected in radio wavelengths with a duration of only a few milliseconds, and they may also have prompt gamma-ray flashes. Here we carry out a blind search for msec-duration…

High Energy Astrophysical Phenomena · Physics 2019-06-07 Shotaro Yamasaki , Tomonori Totani , Norita Kawanaka

The fourth Fermi Large Area Telescope (LAT) catalog (4FGL) contains 5064 $\gamma$-ray sources detected at high significance, but 26% of them still lack associations at other wavelengths. The SPT-SZ survey, conducted between 2008 and 2011…

High Energy Astrophysical Phenomena · Physics 2023-01-04 Lizhong Zhang , Joaquin D. Vieira , Marco Ajello , Matthew A. Malkan , Melanie A. Archipley , Joseph Capota , Allen Foster , Greg Madejski

A significant fraction of all $\gamma$-ray sources detected by the Large Area Telescope aboard the \fer\ satellite is still lacking a low-energy counterpart. In addition, there is still a large population of $\gamma$-ray sources with…

The Fermi Large Area Telescope has detected over 260 gamma-ray pulsars. About one quarter of these are labeled as radio-quiet. In the population of nonrecycled gamma-ray pulsars, the fraction of radio-quiet pulsars is higher, about one…

High Energy Astrophysical Phenomena · Physics 2021-10-13 J. -M. Grießmeier , D. A. Smith , G. Theureau , T. J. Johnson , M. Kerr , L. Bondonneau , I. Cognard , M. Serylak

We present a multiwavelength study of the unidentified Fermi gamma-ray source 0FGL J1830.3+0617, which exhibits variability above 200 MeV on timescales of days to weeks. Within the Fermi 95% confidence error contour lies B1827+0617, a radio…

High Energy Astrophysical Phenomena · Physics 2009-08-12 N. Mirabal , J. P. Halpern

We 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…

High Energy Astrophysical Phenomena · Physics 2022-07-05 LAT collaboration , Soheila Abdollahi , Fabio Acero , Luca Baldini , Jean Ballet , Denis Bastieri , Ronaldo Bellazzini , Bijan Berenji , Alessandra Berretta , Elisabetta Bissaldi , Roger D. Blandford , Elliott Bloom , Raffaella Bonino , Ari Brill , Richard J. Britto , Philippe Bruel , Toby H. Burnett , Sara Buson , Rob A. Cameron , Regina Caputo , Patrizia A. Caraveo , Daniel Castro , Sylvain Chaty , Teddy C. Cheung , Graziano Chiaro , Nicolo Cibrario , Stefano Ciprini , Javier Coronado-Blazquez , Milena Crnogorcevic , Sara Cutini , Filippo D'Ammando , Salvatore De Gaetano , Seth W. Digel , Niccolo Di Lalla , Feraol F. Dirirsa , Leonardo Di Venere , Alberto Dominguez , Vandad Fallah Ramazani , Stephen J. Fegan , Elizabeth C. Ferrara , Alessio Fiori , Henrike Fleischhack , Anna Franckowiak , Yasushi Fukazawa , Stefan Funk , Piergiorgio Fusco , Giorgio Galanti , Viviana Gammaldi , Fabio Gargano , Simone Garrappa , Dario Gasparrini , Federica Giacchino , Nico Giglietto , Francesco Giordano , Marcello Giroletti , Thomas Glanzman , David Green , Isabelle A. Grenier , Marie-Helene Grondin , Lucas Guillemot , Sylvain Guiriec , Michael Gustafsson , Alice K. Harding , Liz Hays , John W. Hewitt , Deirdre Horan , Xian Hou , Gudlaugur Johannesson , Christopher M. Karwin , Taishu Kayanoki , Matthew T. Kerr , Michael Kuss , David Landriu , Stefan Larsson , Luca Latronico , Marianne Lemoine-Goumard , Jian Li , Ioannis Liodakis , Francesco Longo , Francesco Loparco , Benoit Lott , Pasquale Lubrano , Simone Maldera , Dmitry Malyshev , Alberto Manfreda , Guillem Marti-Devesa , Mario N. Mazziotta , Isabella Mereu , Manuel Meyer , Peter F. Michelson , Nestor Mirabal , Warit Mitthumsiri , Tsunefumi Mizuno , Alex A. Moiseev , Maria E. Monzani , Aldo Morselli , Igor V. Moskalenko , Michela Negro , Eric Nuss , Nicola Omodei , Monica Orienti , Elena Orlando , David Paneque , Zhiyuan Pei , Jeremy S. Perkins , Massimo Persic , Melissa Pesce-Rollins , Vahe Petrosian , Roberta Pillera , Helen Poon , Troy A. Porter , Giacomo Principe , Silvia Raino , Riccardo Rando , Bindu Rani , Massimiliano Razzano , Soebur Razzaque , Anita Reimer , Olaf Reimer , Thierry Reposeur , Miguel A. Sanchez-Conde , Pablo M. Saz Parkinson , Lorenzo Scotton , Davide Serini , Carmelo Sgro , Eric J. Siskind , David A. Smith , Gloria Spandre , Paolo Spinelli , Kohei Sueoka , Dan J. Suson , Hiro Tajima , Dongguen Tak , Jana B. Thayer , David J. Thompson , Diego F. Torres , Eleonora Troja , Janeth Valverde , Kent Wood , Gabrijela Zaharijas

The Fermi observatory was launched on June 11, 2008. It hosts the \emph{Large Area Telescope} (LAT), sensitive to $\gamma$-ray photons from 20 MeV to over 300 GeV. When the LAT began its activity, nine young and energetic pulsars were known…

High Energy Astrophysical Phenomena · Physics 2009-10-27 Lucas Guillemot

We report on the results of deep X-ray follow-up observations of four unidentified Fermi/LAT gamma-ray sources at high Galactic latitudes using Suzaku. The studied objects were detected with high significance during the first 3 months of…

Using LOFAR, we have performed a very-low-frequency (115-155 MHz) radio survey for millisecond pulsars (MSPs). The survey targeted 52 unidentified Fermi $\gamma$-ray sources. Employing a combination of coherent and incoherent dedispersion,…