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First Fermi-LAT Solar Flare Catalog
Clemson Univ, Kinard Lab Phys, Dept Phys & Astron, Clemson, SC 29634 USA..
Univ Iceland, Inst Sci, IS-107 Reykjavik, Iceland.;;Stockholm Univ, Roslagstullsbacken 23, SE-10691 Stockholm, Sweden..
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics. Oskar Klein Ctr Cosmoparticle Phys, SE-10691 Stockholm, Sweden.;Dalarna Univ, Nat Sci, Sch Educ Hlth & Social Studies, SE-79188 Falun, Sweden..ORCID iD: 0000-0003-0716-107x
Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy..
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2021 (English)In: Astrophysical Journal Supplement Series, ISSN 0067-0049, E-ISSN 1538-4365, Vol. 252, no 2, article id 13Article in journal (Refereed) Published
Abstract [en]

We present the first Fermi-Large Area Telescope (LAT) solar flare catalog covering the 24th solar cycle. This catalog contains 45 Fermi-LAT solar flares (FLSFs) with emission in the gamma-ray energy band (30 MeV-10 GeV) detected with a significance of >= 5 sigma over the years 2010-2018. A subsample containing 37 of these flares exhibits delayed emission beyond the prompt-impulsive hard X-ray phase, with 21 flares showing delayed emission lasting more than two hours. No prompt-impulsive emission is detected in four of these flares. We also present in this catalog observations of GeV emission from three flares originating from active regions located behind the limb of the visible solar disk. We report the lightcurves, spectra, best proton index, and localization (when possible) for all FLSFs. The gamma-ray spectra are consistent with the decay of pions produced by >300 MeV protons. This work contains the largest sample of high-energy gamma-ray flares ever reported and provides a unique opportunity to perform population studies on the different phases of the flare and thus allowing a new window in solar physics to be opened.

Place, publisher, year, edition, pages
American Astronomical Society , 2021. Vol. 252, no 2, article id 13
Keywords [en]
Solar flares, Solar gamma-ray emission, Gamma-ray sources, Gamma-ray telescopes, Catalogs
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:kth:diva-289934DOI: 10.3847/1538-4365/abd32eISI: 000608872500001Scopus ID: 2-s2.0-85101646737OAI: oai:DiVA.org:kth-289934DiVA, id: diva2:1529075
Note

QC 20210217

Correction in: Astrophysical Journal, Supplement Series, Volume 256, Issue 1, September 2021, Article number 24, DOI: 10.3847/1538-4365/ac2155, WoS: 000696694200001

Available from: 2021-02-17 Created: 2021-02-17 Last updated: 2022-09-27Bibliographically approved

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Larsson, Stefan

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