A NuSTAR and Swift view of the hard state of MAXI J1813-095

Jiang J, Buisson DJK, Dauser T, Fabian AC, Furst F, Gallo LC, Harrison FA, Parker ML, Steiner JF, Tomsick JA, Ubach S, Walton DJ (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Monthly Notices of the Royal Astronomical Society Oxford University Press

Book Volume: 514

Pages Range: 1952-1960

Journal Issue: 2

DOI: 10.1093/mnras/stac1401

Abstract

We present an analysis of the NuSTAR and Swift spectra of the black hole candidate MAXI J1813-095 in a failed-transition outburst in 2018. The NuSTAR observations show evidence of reflected emission from the inner region of the accretion disc. By modelling the reflection component in the spectra, we find a disc inner radius of Rin < 7 rg. This result suggests that either a slightly truncated disc or a non-truncated disc forms at a few per cent of the Eddington limit in MAXI J1813-095. Our best-fitting reflection models indicate that the geometry of the innermost accretion remains consistent during the period of NuSTAR observations. The spectral variability of MAXI J1813-095 from multi-epoch observations is dominated by the variable photon index of the Comptonization emission.

Authors with CRIS profile

Thomas Dauser Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut

Involved external institutions

University of Cambridge GB United Kingdom (GB) University of Southampton GB United Kingdom (GB) European Space Astronomy Centre (ESAC) ES Spain (ES) Saint Mary's University CA Canada (CA) California Institute of Technology (Caltech) US United States (USA) (US) Harvard University US United States (USA) (US) University of California, Riverside (UCR) US United States (USA) (US)

How to cite

APA:

Jiang, J., Buisson, D.J.K., Dauser, T., Fabian, A.C., Furst, F., Gallo, L.C.,... Walton, D.J. (2022). A NuSTAR and Swift view of the hard state of MAXI J1813-095. Monthly Notices of the Royal Astronomical Society, 514(2), 1952-1960. https://dx.doi.org/10.1093/mnras/stac1401

MLA:

Jiang, Jiachen, et al. "A NuSTAR and Swift view of the hard state of MAXI J1813-095." Monthly Notices of the Royal Astronomical Society 514.2 (2022): 1952-1960.

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