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000622025 0247_ $$2arXiv$$aarXiv:2402.07994
000622025 0247_ $$2datacite_doi$$a10.3204/PUBDB-2025-00137
000622025 037__ $$aPUBDB-2025-00137
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000622025 088__ $$2arXiv$$aarXiv:2402.07994
000622025 1001_ $$00000-0001-9427-2944$$aJoffre, Scott D.$$b0$$eCorresponding author
000622025 245__ $$aHistorical Fermi All-sky Variability Analysis of Galactic Flares
000622025 260__ $$c2024
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000622025 500__ $$aSubmitted to ApJ Feb. 28 2024. Minor edits in Section 4 and 5 for clarity. 26 pages, 6 figures, 5 Tables
000622025 520__ $$aThe Fermi All-sky Variability Analysis (FAVA) provides a photometric alternative for identifying week-long gamma-ray flares across the entire sky while being independent of any diffuse Galactic or isotropic emission model. We reviewed 779 weeks of Fermi Large Area Telescope data analyzed by FAVA to estimate the rate and origin of Galactic gamma-ray flares, and to search for new variable Galactic gamma-ray transients. We report an estimated yearly rate of ∼8.5 Galactic gamma-ray flares yr$^{–1}$, with ∼1 flare yr$^{–1}$ coming from unknown sources. Out of the known gamma-ray sources that are spatially coincident with these detected flares, we report gamma-ray flares for six of them for the first time. All six are classified as pulsars, or a source of unknown nature but which positionally overlaps with known supernova remnants or pulsar wind nebulae (PWNe). This potentially means these sites are tentative candidates to be the second known site of a variable gamma-ray PWN, after the famous Crab Nebula’s PWN. Additionally, we identify nine unassociated flares that are unlikely to have originated from known gamma-ray sources.
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000622025 7001_ $$00000-0003-3638-8943$$aTorres-Albà, Núria$$b1
000622025 7001_ $$00000-0002-6584-1703$$aAjello, Marco$$b2
000622025 7001_ $$00000-0001-9201-4706$$aKocevski, Daniel$$b3
000622025 7001_ $$0P:(DE-H253)PIP1018733$$aBühler, Rolf$$b4$$udesy
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000622025 9141_ $$y2024
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