The First AGILE Solar Flare Catalog
We report the Astro-rivelatore Gamma a Immagini LEggero (AGILE) observations of solar flares, detected by the onboard anticoincidence system in the 80–200 keV energy range, from 2007 May 1 to 2022 August 31. In more than 15 yr, AGILE detected 5003 X-ray, minute-lasting transients, compatible with a...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal Supplement Series |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/1538-4365/acd4b6 |
| _version_ | 1797698148610605056 |
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| author | A. Ursi N. Parmiggiani M. Messerotti A. Pellizzoni C. Pittori F. Longo F. Verrecchia A. Argan A. Bulgarelli M. Tavani P. Tempesta F. D’Amico |
| author_facet | A. Ursi N. Parmiggiani M. Messerotti A. Pellizzoni C. Pittori F. Longo F. Verrecchia A. Argan A. Bulgarelli M. Tavani P. Tempesta F. D’Amico |
| author_sort | A. Ursi |
| collection | DOAJ |
| description | We report the Astro-rivelatore Gamma a Immagini LEggero (AGILE) observations of solar flares, detected by the onboard anticoincidence system in the 80–200 keV energy range, from 2007 May 1 to 2022 August 31. In more than 15 yr, AGILE detected 5003 X-ray, minute-lasting transients, compatible with a solar origin. A cross-correlation of these transients with the Geostationary Operational Environmental Satellites (GOES) official solar flare database allowed us to associate an intensity class (i.e., B, C, M, or X) to 3572 of them, for which we investigated the main temporal and intensity parameters. The AGILE data clearly revealed the solar activity covering the last stages of the 23rd cycle, the whole 24th cycle, and the beginning of the current 25th cycle. In order to compare our results with other space missions operating in the high-energy range, we also analyzed the public lists of solar flares reported by RHESSI and Fermi Gamma-ray Burst Monitor. This catalog reports 1424 events not contained in the GOES official data set, which, after statistical comparisons, are compatible with low-intensity, short-duration solar flares. Besides providing a further data set of solar flares detected in the hard X-ray range, this study allowed to point out two main features: a longer persistence of the decay phase in the high-energy regime, with respect to the soft X-rays, and a tendency of the flare maximum to be reached earlier in the soft X-rays with respect to the hard X-rays. Both these aspects support a two-phase acceleration mechanism of electrons in the solar atmosphere. |
| first_indexed | 2024-03-12T03:50:09Z |
| format | Article |
| id | doaj.art-0b251d5b21854c9f946c10387bb6971a |
| institution | Directory Open Access Journal |
| issn | 0067-0049 |
| language | English |
| last_indexed | 2024-03-12T03:50:09Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal Supplement Series |
| spelling | doaj.art-0b251d5b21854c9f946c10387bb6971a2023-09-03T12:26:21ZengIOP PublishingThe Astrophysical Journal Supplement Series0067-00492023-01-012671910.3847/1538-4365/acd4b6The First AGILE Solar Flare CatalogA. Ursi0https://orcid.org/0000-0002-7253-9721N. Parmiggiani1https://orcid.org/0000-0002-4535-5329M. Messerotti2https://orcid.org/0000-0002-5422-1963A. Pellizzoni3https://orcid.org/0000-0002-4590-0040C. Pittori4https://orcid.org/0000-0001-6661-9779F. Longo5https://orcid.org/0000-0003-2501-2270F. Verrecchia6https://orcid.org/0000-0003-3455-5082A. Argan7https://orcid.org/0000-0002-6230-665XA. Bulgarelli8https://orcid.org/0000-0001-6347-0649M. Tavani9https://orcid.org/0000-0003-2893-1459P. Tempesta10F. D’Amico11INAF/IAPS, via del Fosso del Cavaliere 100, I-00133 Roma (RM), Italy ; alessandro.ursi@inaf.it; ASI, via del Politecnico snc, I-00133 Roma (RM), ItalyINAF/OAS, via Gobetti 101, I-40129 Bologna (BO), ItalyOsservatorio Astronomico di Trieste, via G.B. Tiepolo 11, I-34131 Trieste (TS), ItalyINAF—Osservatorio Astronomico di Cagliari, via della Scienza 5, I-09047 Selargius (CA), ItalySSDC/ASI, via del Politecnico snc, I-00133 Roma (RM), Italy; INAF/OAR, via Frascati 33, I-00078 Monte Porzio Catone (RM), ItalyDipartimento di Fisica, Università di Trieste and INFN , via Valerio 2, I-34127 Trieste (TR), ItalySSDC/ASI, via del Politecnico snc, I-00133 Roma (RM), Italy; INAF/OAR, via Frascati 33, I-00078 Monte Porzio Catone (RM), ItalyINAF/IAPS, via del Fosso del Cavaliere 100, I-00133 Roma (RM), Italy ; alessandro.ursi@inaf.itINAF/OAS, via Gobetti 101, I-40129 Bologna (BO), ItalyINAF/IAPS, via del Fosso del Cavaliere 100, I-00133 Roma (RM), Italy ; alessandro.ursi@inaf.it; Università degli Studi di Roma Tor Vergata , via della Ricerca Scientifica 1, I-00133 Roma (RM), ItalyTelespazio SpA, Centro Spaziale del Fucino 23, Piana del Fucino, Via Cintarella, I-67050, Ortucchio (AQ), ItalyASI, via del Politecnico snc, I-00133 Roma (RM), ItalyWe report the Astro-rivelatore Gamma a Immagini LEggero (AGILE) observations of solar flares, detected by the onboard anticoincidence system in the 80–200 keV energy range, from 2007 May 1 to 2022 August 31. In more than 15 yr, AGILE detected 5003 X-ray, minute-lasting transients, compatible with a solar origin. A cross-correlation of these transients with the Geostationary Operational Environmental Satellites (GOES) official solar flare database allowed us to associate an intensity class (i.e., B, C, M, or X) to 3572 of them, for which we investigated the main temporal and intensity parameters. The AGILE data clearly revealed the solar activity covering the last stages of the 23rd cycle, the whole 24th cycle, and the beginning of the current 25th cycle. In order to compare our results with other space missions operating in the high-energy range, we also analyzed the public lists of solar flares reported by RHESSI and Fermi Gamma-ray Burst Monitor. This catalog reports 1424 events not contained in the GOES official data set, which, after statistical comparisons, are compatible with low-intensity, short-duration solar flares. Besides providing a further data set of solar flares detected in the hard X-ray range, this study allowed to point out two main features: a longer persistence of the decay phase in the high-energy regime, with respect to the soft X-rays, and a tendency of the flare maximum to be reached earlier in the soft X-rays with respect to the hard X-rays. Both these aspects support a two-phase acceleration mechanism of electrons in the solar atmosphere.https://doi.org/10.3847/1538-4365/acd4b6Solar flaresHigh energy astrophysics |
| spellingShingle | A. Ursi N. Parmiggiani M. Messerotti A. Pellizzoni C. Pittori F. Longo F. Verrecchia A. Argan A. Bulgarelli M. Tavani P. Tempesta F. D’Amico The First AGILE Solar Flare Catalog The Astrophysical Journal Supplement Series Solar flares High energy astrophysics |
| title | The First AGILE Solar Flare Catalog |
| title_full | The First AGILE Solar Flare Catalog |
| title_fullStr | The First AGILE Solar Flare Catalog |
| title_full_unstemmed | The First AGILE Solar Flare Catalog |
| title_short | The First AGILE Solar Flare Catalog |
| title_sort | first agile solar flare catalog |
| topic | Solar flares High energy astrophysics |
| url | https://doi.org/10.3847/1538-4365/acd4b6 |
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