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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/8163
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dc.contributor.authorSharma, Rahul-
dc.contributor.authorJain, Chetana-
dc.contributor.authorPaul, Biswajit-
dc.contributor.authorSeshadri, T. R.-
dc.date.accessioned2023-10-27T06:31:32Z-
dc.date.available2023-10-27T06:31:32Z-
dc.date.issued2023-10-01-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, 2023, Vol. 526, p4877en_US
dc.identifier.issn0035-8711-
dc.identifier.issn1365-2966 (Online)-
dc.identifier.urihttp://hdl.handle.net/2289/8163-
dc.descriptionOpen Accessen_US
dc.description.abstractWe present here timing and spectral analyses of SGR J1830−0645 based on an AstroSat observation carried out on 2020 October 16, about a week after the onset of its first detected X-ray outburst. Using data taken with the Soft X-ray Telescope (SXT) and Large Area X-ray Proportional Counter (LAXPC), we have detected 0.9–10 keV coherent pulsations at a period of ∼10.4 s. The pulse profiles were single-peaked, asymmetric, and consisted of minor peaks attributable to hotspots on the neutron star surface. The pulsed fraction evolved significantly with energy, increasing to energies around 5 keV with a steep drop thereafter. The 0.9–25 keV SXT–LAXPC energy spectrum is best described with two thermal components having temperatures ∼0.46 and ∼1.1 keV (emission radii of ∼2.4 and ∼0.65 km, respectively, assuming a distance of 4 kpc) along with a power-law component having a photon index of ∼0.39. We report the detection of 67 X-ray bursts having an average duration of ∼33 ms. The brightest burst lasted for about 90 ms and had a 3–25 keV fluence of ∼5 × 10−9 erg cm−2 .en_US
dc.language.isoenen_US
dc.publisherOxford University Press on behalf of Royal Astronomical Societyen_US
dc.relation.urihttps://ui.adsabs.harvard.edu/abs/2023arXiv231004079S/abstracten_US
dc.relation.urihttps://arxiv.org/abs/2310.04079en_US
dc.relation.urihttps://doi.org/10.1093/mnras/stad3026en_US
dc.relation.urihttps://inspirehep.net/literature/2709449en_US
dc.rights2023 The Author(s)en_US
dc.subjectstarsen_US
dc.subjectneutronen_US
dc.subjectmagnetarsen_US
dc.subjectx-raysen_US
dc.subjectburstsen_US
dc.subjectSGR J1830−0645en_US
dc.titleAstroSat observation of the magnetar SGR J1830−0645 during its first detected X-ray outbursten_US
dc.typeArticleen_US
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