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We describe the optical spectropolarimetric monitoring program at Steward Observatory centered around gamma-ray-bright blazars and the LAT Monitored Source List planned for Fermi Cycles 2-4. The large number of measurements made during…

High Energy Astrophysical Phenomena · Physics 2009-12-21 P. S. Smith , E. Montiel , S. Rightley , J. Turner , G. D. Schmidt , B. T. Jannuzi

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

The Large Area Telescope on the Fermi gamma-ray Space Telescope provides unprecedented sensitivity for all-sky monitoring of gamma-ray activity. It has detected a few Galactic sources, including 2 gamma-ray binaries and a microquasar. In…

High Energy Astrophysical Phenomena · Physics 2016-11-15 Sylvain Chaty

We implemented a real-time data processor (rta-dp) framework that can be used to develop real-time analysis pipelines and data handling systems to manage high-throughput data streams with distributed applications in the context of ground…

Instrumentation and Methods for Astrophysics · Physics 2025-11-07 A. Bulgarelli , N. Parmiggiani , L. Castaldini , R. Falco , A. Di Piano , V. Fioretti , G. Panebianco , A. Rizzo

The Fermi Large Area Telescope (LAT) light curve repository (LCR) is a publicly available, continually updated library of gamma-ray light curves of variable Fermi-LAT sources generated over multiple timescales. The Fermi-LAT LCR aims to…

High Energy Astrophysical Phenomena · Physics 2023-03-29 S. Abdollahi , M. Ajello , L. Baldini , J. Ballet , D. Bastieri , J. Becerra Gonzalez , R. Bellazzini , A. Berretta , E. Bissaldi , R. Bonino , A. Brill , P. Bruel , E. Burns , S. Buson , A. Cameron , R. Caputo , P. A. Caraveo , N. Cibrario , S. Ciprini , P. Cristarella Orestano , M. Crnogorcevic , S. Cutini , F. D'Ammando , S. De Gaetano , S. W. Digel , N. Di Lalla , L. Di Venere , A. Domínguez , V. Fallah Ramazani , S. J. Fegan , E. C. Ferrara , A. Fiori , H. Fleischhack , A. Franckowiak , Y. Fukazawa , P. Fusco , V. Gammaldi , F. Gargano , S. Garrappa , C. Gasbarra , D. Gasparrini , N. Giglietto , F. Giordano , M. Giroletti , D. Green , I. A. Grenier , S. Guiriec , M. Gustafsson , E. Hays , D. Horan , X. Hou , G. Jóhannesson , M. Kerr , D. Kocevski , M. Kuss , L. Latronico , J. Li , I. Liodakis , F. Longo , F. Loparco , L. Lorusso , B. Lott , M. N. Lovellette , P. Lubrano , S. Maldera , A. Manfreda , G. Mart\'-Devesa , M. N. Mazziotta , I. Mereu , M. Meyer , P. F. Michelson , T. Mizuno , M. E. Monzani , A. Morselli , I. V. Moskalenko , M. Negro , N. Omodei , E. Orlando , J. F. Ormes , D. Paneque , G. Panzarini , J. S. Perkins , M. Persic , M. Pesce-Rollins , R. Pillera , T. A. Porter , G. Principe , J. L. Racusin , S. Rainò , R. Rando , B. Rani , M. Razzano , S. Razzaque , A. Reimer , O. Reimer , M. Sánchez-Conde , P. M. Saz Parkinson , Jeff Scargle , L. Scotton , D. Serini , C. Sgrò , E. J. Siskind , G. Spandre , P. Spinelli , D. J. Suson , H. Tajima , D. J. Thompson , D. F. Torres , J. Valverde , T. Venters , Z. Wadiasingh , S. Wagner , K. Wood

The analysis of Fermi Large Area Telescope (LAT) gamma-ray data in a given Region Of Interest (RoI) usually consists of performing a binned log-likelihood fit in order to determine the sky model that, after convolution with the instrument…

High Energy Astrophysical Phenomena · Physics 2021-12-08 P. Bruel

The Large Area Telescope (LAT) onboard the Fermi satellite is exploring the gamma-ray sky in the energy range above 20MeV. We have developed a method to reconstruct the energy spectra of the gamma rays detected by the Fermi LAT instrument…

Instrumentation and Methods for Astrophysics · Physics 2019-08-14 M. N. Mazziotta

Over the past 16 years, the Fermi Large Area Telescope (LAT) has significantly advanced our view of the GeV gamma-ray sky, yet several key questions remain - such as the composition of the isotropic gamma-ray background, the origin of the…

High Energy Astrophysical Phenomena · Physics 2025-05-07 Christopher Eckner , Noemi Anau Montel , Florian List , Francesca Calore , Christoph Weniger

In three years of observations since the beginning of nominal science operations in August 2008, the Large Area Telescope (LAT) on board the Fermi Gamma Ray Space Telescope has observed high-energy (>20 MeV) \gamma-ray emission from 35…

High Energy Astrophysical Phenomena · Physics 2015-06-15 LAT Collaboration

The proper estimation of the background is a crucial component of data analyses in astrophysics, such as source detection, temporal studies, spectroscopy, and localization. For the case of the Large Area Telescope (LAT) on board the Fermi…

Instrumentation and Methods for Astrophysics · Physics 2013-08-28 V. Vasileiou

The Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope observatory is a pair conversion telescope sensitive to gamma-rays over more than four energy decades, between 20 MeV and more than 300 GeV. Acting in synergy with the…

High Energy Astrophysical Phenomena · Physics 2019-08-14 Nicola Omodei

The Large Area Telescope on the recently launched Fermi Gamma-ray Space Telescope (formerly GLAST), with its large field of view and effective area, combined with its excellent timing capabilities, is poised to revolutionize the field of…

Astrophysics of Galaxies · Physics 2019-08-14 P. M. Saz Parkinson

We present GLEAM (Galaxy Line Emission & Absorption Modeling), a Python tool for fitting Gaussian models to emission and absorption lines in large samples of 1D extragalactic spectra. GLEAM is tailored to work well in batch mode without…

Instrumentation and Methods for Astrophysics · Physics 2021-03-08 Andra Stroe , Victor-Nicolae Savu

{Context}. The HIFI instrument on the Herschel Space Observatory performed over 9100 astronomical observations, almost 900 of which were calibration observations in the course of the nearly four-year Herschel mission. The data from each…

ADARI (Astronomical DAta Reporting Infrastructure) is a system designed for creating graphical reports of astronomical data so that the quality of these products can be assessed. It has been designed from the ground up to be…

Instrumentation and Methods for Astrophysics · Physics 2025-10-02 C. E. García-Dabó , P. Beirao , Z. Kostrzewa , A. Gabasch , B. Wolff , M. White , M. Deshpande , B. Miszalski , P. Corcho-Caballero , C. Onken , A. Heng , M. González

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 years of operations, from 2008…

High Energy Astrophysical Phenomena · Physics 2019-06-28 M. Axelsson , E. Bissaldi , N. Omodei , G. Vianello

From the launch of the Fermi Gamma-ray Space Telescope to July 9, 2010, the Gamma-ray Burst Monitor (GBM) has detected 497 probable GRB events. Twenty-two of these satisfy the simultaneous requirements of an estimated burst direction within…

High Energy Astrophysical Phenomena · Physics 2015-05-20 C. W. Akerlof , W. Zheng , S. B. Pandey , T. A. McKay

Gamma-sky.net is a novel interactive website designed for exploring the gamma-ray sky. The Map View portion of the site is powered by the Aladin Lite sky atlas, providing a scalable survey image tesselated onto a three-dimensional sphere.…

Instrumentation and Methods for Astrophysics · Physics 2017-09-14 Arjun Voruganti , Christoph Deil , Axel Donath , Johannes King

We describe a long-term Swift monitoring program of Fermi gamma-ray sources, particularly the 23 gamma-ray "sources of interest." We present a systematic analysis of the Swift X-ray Telescope light curves and hardness ratios of these…

High Energy Astrophysical Phenomena · Physics 2015-06-16 Michael C. Stroh , Abe D. Falcone

Gammapy is a Python package for high-level gamma-ray data analysis built on Numpy, Scipy and Astropy. It enables us to analyze gamma-ray data and to create sky images, spectra and lightcurves, from event lists and instrument response…

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