GRB 180128A: A second magnetar giant flare candidate from the Sculptor Galaxy

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dc.citation.articleNumberA173en_US
dc.citation.journalTitleAstronomy & Astrophysicsen_US
dc.citation.volumeNumber687en_US
dc.contributor.authorTrigg, Aaron C.en_US
dc.contributor.authorBurns, Ericen_US
dc.contributor.authorRoberts, Oliver J.en_US
dc.contributor.authorNegro, Michelaen_US
dc.contributor.authorSvinkin, Dmitry S.en_US
dc.contributor.authorBaring, Matthew G.en_US
dc.contributor.authorWadiasingh, Zorawaren_US
dc.contributor.authorChristensen, Nelson L.en_US
dc.contributor.authorAndreoni, Igoren_US
dc.contributor.authorBriggs, Michael S.en_US
dc.contributor.authorLalla, Niccolò Dien_US
dc.contributor.authorFrederiks, Dmitry D.en_US
dc.contributor.authorLipunov, Vladimir M.en_US
dc.contributor.authorOmodei, Nicolaen_US
dc.contributor.authorRidnaia, Anna V.en_US
dc.contributor.authorVeres, Peteren_US
dc.contributor.authorLysenko, Alexandra L.en_US
dc.date.accessioned2024-08-09T16:25:25Zen_US
dc.date.available2024-08-09T16:25:25Zen_US
dc.date.issued2024en_US
dc.description.abstractMagnetars are slowly rotating neutron stars that possess the strongest magnetic fields known in the cosmos (10 14 − 10 15 G). They display a range of transient high-energy electromagnetic activity. The brightest and most energetic of these events are the gamma-ray bursts (GRBs) known as magnetar giant flares (MGFs), with isotropic energies E iso ≈ 10 44 − 10 46 erg. Only seven MGF detections have been made to date: three unambiguous events occurred in our Galaxy and the Magellanic Clouds, and the other four MGF candidates are associated with nearby star-forming galaxies. As all seven identified MGFs are bright at Earth, additional weaker events likely remain unidentified in archival data. We conducted a search of the Fermi Gamma-ray Burst Monitor database for candidate extragalactic MGFs and, when possible, collected localization data from the Interplanetary Network (IPN) satellites. Our search yielded one convincing event, GRB 180128A. IPN localizes this burst within NGC 253, commonly known as the Sculptor Galaxy. The event is the second MGF in modern astronomy to be associated with this galaxy and the first time two bursts have been associated with a single galaxy outside our own. Here we detail the archival search criteria that uncovered this event and its spectral and temporal properties, which are consistent with expectations for a MGF. We also discuss the theoretical implications and finer burst structures resolved from various binning methods. Our analysis provides observational evidence of an eighth identified MGF.en_US
dc.identifier.citationTrigg, A. C., Burns, E., Roberts, O. J., Negro, M., Svinkin, D. S., Baring, M. G., Wadiasingh, Z., Christensen, N. L., Andreoni, I., Briggs, M. S., Lalla, N. D., Frederiks, D. D., Lipunov, V. M., Omodei, N., Ridnaia, A. V., Veres, P., & Lysenko, A. L. (2024). GRB 180128A: A second magnetar giant flare candidate from the Sculptor Galaxy. Astronomy & Astrophysics, 687, A173. https://doi.org/10.1051/0004-6361/202348858en_US
dc.identifier.digitalaa48858-23en_US
dc.identifier.doihttps://doi.org/10.1051/0004-6361/202348858en_US
dc.identifier.urihttps://hdl.handle.net/1911/117632en_US
dc.language.isoengen_US
dc.publisherEDP Sciencesen_US
dc.rightsExcept where otherwise noted, this work is licensed under a Creative Commons Attribution (CC BY) license.  Permission to reuse, publish, or reproduce the work beyond the terms of the license or beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titleGRB 180128A: A second magnetar giant flare candidate from the Sculptor Galaxyen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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