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Title: Fermi Detection Of γ-Ray Emission From The M2 Soft X-Ray Flare On 2010 June 12

Abstract

The GOES M2-class solar flare, SOL2010-06-12T00:57, was modest in many respects yet exhibited remarkable acceleration of energetic particles. The flare produced an ~50 s impulsive burst of hard X- and γ-ray emission up to at least 400 MeV observed by the Fermi GBM and LAT experiments. The remarkably similar hard X-ray and high-energy γ-ray time profiles suggest that most of the particles were accelerated to energies &300 MeV with a delay of ~10 s from mildly relativistic electrons, but some reached these energies in as little as ~3 s. The γ-ray line fluence from this flare was about ten times higher than that typically observed from this modest GOES class of X-ray flare. There is no evidence for time-extended >100 MeV emission as has been found for other flares with high-energy rays.

Authors:
 [1]
  1. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); et al.
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
Contributing Org.:
Fermi LAT Collaboration
OSTI Identifier:
1356763
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 745; Journal Issue: 2; Journal ID: ISSN 0004-637X
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Ackermann, M. Fermi Detection Of γ-Ray Emission From The M2 Soft X-Ray Flare On 2010 June 12. United States: N. p., 2012. Web. doi:10.1088/0004-637X/745/2/144.
Ackermann, M. Fermi Detection Of γ-Ray Emission From The M2 Soft X-Ray Flare On 2010 June 12. United States. doi:10.1088/0004-637X/745/2/144.
Ackermann, M. Thu . "Fermi Detection Of γ-Ray Emission From The M2 Soft X-Ray Flare On 2010 June 12". United States. doi:10.1088/0004-637X/745/2/144. https://www.osti.gov/servlets/purl/1356763.
@article{osti_1356763,
title = {Fermi Detection Of γ-Ray Emission From The M2 Soft X-Ray Flare On 2010 June 12},
author = {Ackermann, M.},
abstractNote = {The GOES M2-class solar flare, SOL2010-06-12T00:57, was modest in many respects yet exhibited remarkable acceleration of energetic particles. The flare produced an ~50 s impulsive burst of hard X- and γ-ray emission up to at least 400 MeV observed by the Fermi GBM and LAT experiments. The remarkably similar hard X-ray and high-energy γ-ray time profiles suggest that most of the particles were accelerated to energies &300 MeV with a delay of ~10 s from mildly relativistic electrons, but some reached these energies in as little as ~3 s. The γ-ray line fluence from this flare was about ten times higher than that typically observed from this modest GOES class of X-ray flare. There is no evidence for time-extended >100 MeV emission as has been found for other flares with high-energy rays.},
doi = {10.1088/0004-637X/745/2/144},
journal = {Astrophysical Journal},
number = 2,
volume = 745,
place = {United States},
year = {2012},
month = {1}
}

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