Revised GLE database : Fluences of solar energetic particles as measured by the neutron-monitor network since 1956

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dc.contributor University of Helsinki, Department of Physics en
dc.contributor.author Usoskin, Dmitry
dc.contributor.author Koldobskiy, S.
dc.contributor.author Kovaltsov, G. A.
dc.contributor.author Gil, A.
dc.contributor.author Usoskina,
dc.contributor.author Willamo, T.
dc.contributor.author Ibragimov, A.
dc.date.accessioned 2020-10-30T14:14:01Z
dc.date.available 2020-10-30T14:14:01Z
dc.date.issued 2020-07-31
dc.identifier.citation Usoskin , D , Koldobskiy , S , Kovaltsov , G A , Gil , A , Usoskina , , Willamo , T & Ibragimov , A 2020 , ' Revised GLE database : Fluences of solar energetic particles as measured by the neutron-monitor network since 1956 ' , Astronomy & Astrophysics , vol. 640 , A17 . https://doi.org/10.1051/0004-6361/202038272 en
dc.identifier.issn 0004-6361
dc.identifier.other PURE: 143466481
dc.identifier.other PURE UUID: 41ce44c3-18dc-4707-b8eb-61306d7c94d0
dc.identifier.other WOS: 000557532200005
dc.identifier.uri http://hdl.handle.net/10138/320875
dc.description.abstract Aims. Continuous measurements of ground-based neutron monitors (NMs) form the main data source for studying high-energy high-intensity solar energetic particle (SEP) events that are called ground-level enhancements (GLEs). All available data are collected in the International GLE Database (IGLED), which provides formal NM count-rate increases above the constant pre-increase level which is due to galactic cosmic rays (GCR). This data set is used to reconstruct the energy spectra of GLE events. However, the assumption of a constant GCR background level throughout GLE events is often invalid. Here we thoroughly revise the IGLED and provide a data set of detrended NM count-rate increases that accounts for the variable GCR background. Methods. The formal GLE count-rate increases were corrected for the variable GCR background, which may vary significantly during GLE events. The corresponding integral omnidirectional fluences of SEPs were reconstructed for all GLEs with sufficient strength from the detrended data using the effective rigidity method. Results. The database of the detrended NM count rate is revised for GLE events since 1956. Integral omnidirectional fluences were estimated for 58 GLE events and parametrised for 52 sufficiently strong events using the modified Ellison-Ramaty spectral shape. Conclusions. The IGLED was revised to account for the variable GCR background. Integral omnidirectional fluences reconstructed for most of GLE events were added to IGLED. This forms the basis for more precise studies of parameters of SEP events and thus for solar and space physics. en
dc.format.extent 18
dc.language.iso eng
dc.relation.ispartof Astronomy & Astrophysics
dc.rights en
dc.subject Sun: particle emission en
dc.subject catalogs en
dc.subject Sun: flares en
dc.subject solar-terrestrial relations en
dc.subject PROTON EVENTS en
dc.subject COSMIC-RAYS en
dc.subject MODULATION en
dc.subject 115 Astronomy, Space science en
dc.title Revised GLE database : Fluences of solar energetic particles as measured by the neutron-monitor network since 1956 en
dc.type Article
dc.description.version Peer reviewed
dc.identifier.doi https://doi.org/10.1051/0004-6361/202038272
dc.type.uri info:eu-repo/semantics/other
dc.type.uri info:eu-repo/semantics/publishedVersion
dc.contributor.pbl

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