Reflection Spectra of the Black Hole Binary Candidate MAXI J1535-571 in the Hard State Observed by NuSTAR

Abstract

We report on a NuSTAR observation of the recently discovered bright black hole candidate MAXI J1535-571. NuSTAR observed the source on MJD 58003 (five days after the outburst was reported). The spectrum is characteristic of a black hole binary in the hard state. We observe clear disk reflection features, including a broad Fe K$\alpha$ line and a Compton hump peaking around 30 keV. Detailed spectral modeling reveals narrow Fe K$\alpha$ line complex centered around 6.5 keV on top of the strong relativistically broadened Fe K$\alpha$ line. The narrow component is consistent with distant reflection from moderately ionized material. The spectral continuum is well described by a combination of cool thermal disk photons and a Comptonized plasma with the electron temperature $k{T}_{\mathrm{e}}=19.7\pm 0.4$ keV. An adequate fit can be achieved for the disk reflection features with a self-consistent relativistic reflection model that assumes a lamp-post geometry for the coronal illuminating source. The spectral fitting measures a black hole spin $a>0.84$, inner disk radius $R_{\mathrm{in}}<2.01r_{\mathrm{ISCO}}$, and a lamp-post height $h=7.2_{-2.0}^{+0.8}{r}_{\mathrm{g}}$ (statistical errors, 90% confidence), indicating no significant disk truncation and a compact corona. Although the distance and mass of this source are not currently known, this suggests the source was likely in the brighter phases of the hard state during this NuSTAR observation.

accepted for publication in ApJL

References in corpus (6)

• X-ray Properties of Black-Hole Binaries
• The role of the reflection fraction in constraining black hole spin
• A quasi-periodic modulation of the iron line centroid energy in the black hole binary H 1743-322
• Broadband X-ray Imaging and Spectroscopy of the Crab Nebula and Pulsar with NuSTAR
• New Constraints on the Black Hole Low/Hard State Inner Accretion Flow with NuSTAR
• Hard X-ray emission of the microquasar GRO J1655-40 during the rise of its 2005 outburst

Cited by in corpus (38)

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• Testing the dynamic origin of Quasi-periodic Oscillations in MAXI J1535-571 and H 1743-322
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• Low Frequency Quasi Periodic Oscillations and Shocks in Accretion onto Black Hole
• Global Accretion Properties of Black Hole X-Ray Binaries: A Phenomenological Perspective
• Using X-ray continuum-fitting to estimate the spin of MAXI J1305-704
• The spin measurement of MAXI J0637-430: a black hole candidate with high disk density
• Impact of the returning radiation on X-ray reflection spectroscopy measurements: the case of Galactic black holes
• MAXI J1535-571 2017 outburst Seen by INTEGRAL/SPI and Investigating the Origin of Its Hard Tail
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