The First Fermi‐GBM Terrestrial Gamma Ray Flash Catalog.
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| Title: | The First Fermi‐GBM Terrestrial Gamma Ray Flash Catalog. |
|---|---|
| Authors: | Roberts, O. J.1,2 oliver.roberts@nasa.gov, Fitzpatrick, G.1,3, Stanbro, M.4, McBreen, S.1, Briggs, M. S.3,4, Holzworth, R. H.5, Grove, J. E.6, Chekhtman, A.7, Cramer, E. S.3, Mailyan, B. G.3,8 |
| Source: | Journal of Geophysical Research. Space Physics. May2018, Vol. 123 Issue 5, p4381-4401. 21p. |
| Abstract: | Abstract: We present the first Fermi Space Telescope Gamma Ray Burst Monitor (GBM) catalog of 4,144 terrestrial gamma ray flashes (TGFs), detected since launch in 11 July 2008 through 31 July 2016. We discuss the updates and improvements to the triggered data and off‐line search algorithms, comparing this improved detection rate of ∼800 TGFs per year with event rates from previously published TGF catalogs from other missions. A Bayesian block algorithm calculated the temporal and spectral properties of the TGFs, revealing a delay between the hard (>300 keV) and soft (≤300 keV) photons of around 27 μs. Detector count rates of “low‐fluence” events were found to have average rates exceeding 150 kHz. Searching the World‐Wide Lightning Location Network data for radio sferics within ±5 min of each TGF revealed a clean sample of 1,314 World‐Wide Lightning Location Network locations, which were used to to accurately locate TGF‐producing storms. It also revealed lightning and storm activity for specific regions, as well as seasonal and daily variations of global lightning patterns. Correcting for the orbit of Fermi, we quantitatively find a marginal excess of TGFs being produced from storms over land near oceans (i.e., narrow isthmuses and small islands). No difference was observed between the duration of TGFs over the ocean and land. The distribution of TGFs at a given local solar time for predefined American, Asian, and African regions were confirmed to correlate well with known regional lightning rates. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Geophysical Research. Space Physics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | GreenFILE |
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| Header | DbId: 8gh DbLabel: GreenFILE An: 130750029 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: The First Fermi‐GBM Terrestrial Gamma Ray Flash Catalog. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Roberts%2C+O%2E+J%2E%22">Roberts, O. J.</searchLink><relatesTo>1,2</relatesTo><i> oliver.roberts@nasa.gov</i><br /><searchLink fieldCode="AR" term="%22Fitzpatrick%2C+G%2E%22">Fitzpatrick, G.</searchLink><relatesTo>1,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Stanbro%2C+M%2E%22">Stanbro, M.</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22McBreen%2C+S%2E%22">McBreen, S.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Briggs%2C+M%2E+S%2E%22">Briggs, M. S.</searchLink><relatesTo>3,4</relatesTo><br /><searchLink fieldCode="AR" term="%22Holzworth%2C+R%2E+H%2E%22">Holzworth, R. H.</searchLink><relatesTo>5</relatesTo><br /><searchLink fieldCode="AR" term="%22Grove%2C+J%2E+E%2E%22">Grove, J. E.</searchLink><relatesTo>6</relatesTo><br /><searchLink fieldCode="AR" term="%22Chekhtman%2C+A%2E%22">Chekhtman, A.</searchLink><relatesTo>7</relatesTo><br /><searchLink fieldCode="AR" term="%22Cramer%2C+E%2E+S%2E%22">Cramer, E. S.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Mailyan%2C+B%2E+G%2E%22">Mailyan, B. G.</searchLink><relatesTo>3,8</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Geophysical+Research%2E+Space+Physics%22">Journal of Geophysical Research. Space Physics</searchLink>. May2018, Vol. 123 Issue 5, p4381-4401. 21p. – Name: Abstract Label: Abstract Group: Ab Data: Abstract: We present the first Fermi Space Telescope Gamma Ray Burst Monitor (GBM) catalog of 4,144 terrestrial gamma ray flashes (TGFs), detected since launch in 11 July 2008 through 31 July 2016. We discuss the updates and improvements to the triggered data and off‐line search algorithms, comparing this improved detection rate of ∼800 TGFs per year with event rates from previously published TGF catalogs from other missions. A Bayesian block algorithm calculated the temporal and spectral properties of the TGFs, revealing a delay between the hard (>300 keV) and soft (≤300 keV) photons of around 27 μs. Detector count rates of “low‐fluence” events were found to have average rates exceeding 150 kHz. Searching the World‐Wide Lightning Location Network data for radio sferics within ±5 min of each TGF revealed a clean sample of 1,314 World‐Wide Lightning Location Network locations, which were used to to accurately locate TGF‐producing storms. It also revealed lightning and storm activity for specific regions, as well as seasonal and daily variations of global lightning patterns. Correcting for the orbit of Fermi, we quantitatively find a marginal excess of TGFs being produced from storms over land near oceans (i.e., narrow isthmuses and small islands). No difference was observed between the duration of TGFs over the ocean and land. The distribution of TGFs at a given local solar time for predefined American, Asian, and African regions were confirmed to correlate well with known regional lightning rates. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Geophysical Research. Space Physics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1029/2017JA024837 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 21 StartPage: 4381 Titles: – TitleFull: The First Fermi‐GBM Terrestrial Gamma Ray Flash Catalog. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Roberts, O. J. – PersonEntity: Name: NameFull: Fitzpatrick, G. – PersonEntity: Name: NameFull: Stanbro, M. – PersonEntity: Name: NameFull: McBreen, S. – PersonEntity: Name: NameFull: Briggs, M. S. – PersonEntity: Name: NameFull: Holzworth, R. H. – PersonEntity: Name: NameFull: Grove, J. E. – PersonEntity: Name: NameFull: Chekhtman, A. – PersonEntity: Name: NameFull: Cramer, E. S. – PersonEntity: Name: NameFull: Mailyan, B. G. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2018 Type: published Y: 2018 Identifiers: – Type: issn-print Value: 21699380 Numbering: – Type: volume Value: 123 – Type: issue Value: 5 Titles: – TitleFull: Journal of Geophysical Research. Space Physics Type: main |
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