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http://hdl.handle.net/2445/192366
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DC Field | Value | Language |
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dc.contributor.author | Bosch i Ramon, Valentí | - |
dc.contributor.author | Celma, C. | - |
dc.contributor.author | Linares, Manuel | - |
dc.contributor.author | Russell, D.M. | - |
dc.contributor.author | Sala Cladellas, Gloria | - |
dc.contributor.author | The MAGIC collaboration | - |
dc.contributor.author | The H.E.S.S. Collaboration | - |
dc.contributor.author | The VERITAS collaboration | - |
dc.date.accessioned | 2023-01-19T12:58:17Z | - |
dc.date.available | 2023-01-19T12:58:17Z | - |
dc.date.issued | 2022-09-23 | - |
dc.identifier.issn | 0035-8711 | - |
dc.identifier.uri | http://hdl.handle.net/2445/192366 | - |
dc.description.abstract | MAXI J1820+070 is a low-mass X-ray binary with a black hole (BH) as a compact object. This binary underwent an exceptionally bright X-ray outburst from 2018 March to October, showing evidence of a non-thermal particle population through its radio emission during this whole period. The combined results of 59.5 h of observations of the MAXI J1820+070 outburst with the H.E.S.S., MAGIC and VERITAS experiments at energies above 200 GeV are presented, together with Fermi-LAT data between 0.1 and 500 GeV, and multiwavelength observations from radio to X-rays. Gamma-ray emission is not detected from MAXI J1820+070, but the obtained upper limits and the multiwavelength data allow us to put meaningful constraints on the source properties under reasonable assumptions regarding the non-thermal particle population and the jet synchrotron spectrum. In particular, it is possible to show that, if a high-energy (HE) gamma-ray emitting region is present during the hard state of the source, its predicted flux should be at most a factor of 20 below the obtained Fermi-LAT upper limits, and closer to them for magnetic fields significantly below equipartition. During the state transitions, under the plausible assumption that electrons are accelerated up to ∼500 GeV, the multiwavelength data and the gamma-ray upper limits lead consistently to the conclusion that a potential HE and very-HE gamma-ray emitting region should be located at a distance from the BH ranging between 10 and 10 cm. Similar outbursts from low-mass X-ray binaries might be detectable in the near future with upcoming instruments such as CTA. | - |
dc.format.extent | 15 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | Royal Astronomical Society | - |
dc.relation.isformatof | Reproducció del document publicat a: https://doi.org/10.1093/mnras/stac2686 | - |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society, 2022, vol. 517, num. 4, p. 4736-4751 | - |
dc.relation.uri | https://doi.org/10.1093/mnras/stac2686 | - |
dc.rights | (c) Bosch i Ramon, Valentí et al., 2022 | - |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Estels binaris de raigs X | - |
dc.subject.classification | Raigs gamma | - |
dc.subject.other | X-ray binaries | - |
dc.subject.other | Gamma rays | - |
dc.title | Gamma-ray observations of MAXI J1820+070 during the 2018 outburst | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 726967 | - |
dc.date.updated | 2023-01-19T12:58:17Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
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726967.pdf | 1.62 MB | Adobe PDF | View/Open |
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