Gazing at the ultraslow magnetar in RCW 103 with NuSTAR and Swift

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Title: Gazing at the ultraslow magnetar in RCW 103 with NuSTAR and Swift
Authors: Borghese, Alice | Coti Zelati, Francesco | Esposito, Paolo | Rea, Nanda | De Luca, Andrea | Bachetti, Matteo | Israel, Gian Luca | Perna, Rosalba | Pons, José A.
Research Group/s: Astrofísica Relativista
Center, Department or Service: Universidad de Alicante. Departamento de Física Aplicada
Keywords: Stars: individual: 1E 161348–5055 | Stars: magnetars | Stars: neutron
Knowledge Area: Astronomía y Astrofísica
Issue Date: 21-Jul-2018
Publisher: Oxford University Press
Citation: Monthly Notices of the Royal Astronomical Society. 2018, 478(1): 741-748. doi:10.1093/mnras/sty1119
Abstract: We report on a new NuSTAR observation and on the ongoing Swift X-Ray Telescope monitoring campaign of the peculiar source 1E 161348–5055, located at the centre of the supernova remnant RCW 103, which is recovering from its last outburst in 2016 June. The X-ray spectrum at the epoch of the NuSTAR observation can be described by either two absorbed blackbodies (kTBB1 ∼ 0.5 keV, kTBB2 ∼ 1.2 keV) or an absorbed blackbody plus a power law (kTBB1∼ 0.6 keV, Γ ∼ 3.9). The observed flux was ∼9 × 10−12 erg s−1 cm−2, ∼3 times lower than what observed at the outburst onset, but about one order of magnitude higher than the historical quiescent level. A periodic modulation was detected at the known 6.67 h periodicity. The spectral decomposition and evolution along the outburst decay are consistent with 1E 161348–5055 being a magnetar, the slowest ever detected.
Sponsor: The results reported in this paper are based on observations obtained with Swift and NuSTAR. Swift is a NASA mission with participation of the Italian Space Agency and the UK Space Agency. The NuSTAR mission is a project led by the Californian Institute of Technology. AB, PE, and NR are supported by an NWO Vidi Grant (PI: Rea). FCZ and NR are supported by grants AYA2015-71042-P and SGR2014-1073. We thank the PHAROS COST Action (CA16214) for partial support and the referee for the comments.
ISSN: 0035-8711 (Print) | 1365-2966 (Online)
DOI: 10.1093/mnras/sty1119
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society
Peer Review: si
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Appears in Collections:INV - Astrofísica Relativista - Artículos de Revistas

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