New reconstruction of the event-integrated spectra for GLE events

Discussion timeslot (ZOOM-Meeting): 15. July 2021 - 18:00
ZOOM-Meeting URL: https://desy.zoom.us/j/96969970711
ZOOM-Meeting ID: 96969970711
ZOOM-Meeting Passcode: ICRC2021
Corresponding Session: https://icrc2021-venue.desy.de/channel/23-Solar-Events-observed-onnear-Earth-SH/129
Live-Stream URL: https://icrc2021-venue.desy.de/livestream/Discussion-07/8

Abstract:
'Here we report the new reconstruction of the event-integrated spectra of solar energetic particles (SEP) detected by neutron monitor (NM) network and satellite experiments (mainly GOES data) during ground-level enhancement (GLE) events. The reconstruction of SEP particle fluences is based on the “bow-tie” method employing the latest advances in NM data analysis (time-dependent GCR background and the use of the NM yield function directly verified with the AMS-02 experiment data) and a detailed study of different uncertainties. For the pre-GOES period, we used all available SEP datasets. As a result of this work, we obtained integral fluences of SEPs in the energy range from 30 MeV to a few GeV for 58 moderate and strong GLE events since 1956. The results were fitted with the modified Band-function (a double power-law function with two exponential cutoffs) which is continuous together with its derivative. An easy-to-use presentation of SEP fluences in the form of an analytical expression forms a solid basis for new studies in different fields, such as the influence of SEPs on the atmosphere and a statistical study of extreme solar activity.'

Authors: Sergey Koldobskiy | Osku Raukunen | Rami Vainio | Gennady Kovaltsov | Ilya Usoskin
Indico-ID: 363
Proceeding URL: https://pos.sissa.it/395/1273

URLs to accompanying publications:

http://link.springer.com/10.1007/s11207-018-1326-1

http://link.springer.com/10.1007/s11207-019-1485-8

https://www.aanda.org/10.1051/0004-6361/202038272

https://www.aanda.org/10.1051/0004-6361/202040058