SIMBAD references

2021MNRAS.500..565B - Mon. Not. R. Astron. Soc., 500, 565-575 (2021/January-1)

AstroSat observations of the first Galactic ULX pulsar Swift J0243.6+6124.

BERI A., NAIK S., SINGH K.P., JAISAWAL G.K., BHATTACHARYYA S., CHARLES P., HO W.C.G., MAITRA C., BHATTACHARYA D., DEWANGAN G.C., MIDDLETON M., ALTAMIRANO D., GANDHI P. and RAICHUR H.

Abstract (from CDS):

Swift J0243.6+6124, the first Galactic ultraluminous X-ray pulsar, was observed during its 2017-2018 outburst with AstroSat at both sub- and super-Eddington levels of accretion with X-ray luminosities of LX ∼ 7 x 1037 and 6 x 1038 erg s–1, respectively. Our broad-band timing and spectral observations show that X-ray pulsations at ∼9.85∼ s have been detected up to 150 keV when the source was accreting at the super-Eddington level. The pulse profiles are a strong function of both energy and source luminosity, showing a double-peaked profile with pulse fraction increasing from ∼10 per cent at 1.65∼ keV to 40-80 per cent at 70∼ keV. The continuum X-ray spectra are well modelled with a high-energy cut-off power law (Γ ∼ 0.6-0.7) and one or two blackbody components with temperatures of ∼0.35 and 1.2∼ keV, depending on the accretion level. No iron line emission is observed at sub-Eddington level, while a broad emission feature at around 6.9 keV is observed at the super-Eddington level, along with a blackbody radius (121-142∼ km) that indicates the presence of optically thick outflows.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): pulsars: individual: (Swift J0243.6+6124) - X-rays: binaries

Simbad objects: 12

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2021MNRAS.500..565B and select 'bookmark this link' or equivalent in the popup menu


2022.08.16-20:32:55

© Université de Strasbourg/CNRS

    • Contact