The Spin of New Black Hole Candidate: MAXI J1803-298 Observed by NuSTAR and NICER

Abstract

MAXI J1803-298, a newly-discovered Galactic transient and black hole candidate, was first detected by \emph{MAXI}/GSC on May 1st, 2021. In this paper, we present a detailed spectral analysis of MAXI J1803-298. Utilizing the X-ray reflection fitting method, we perform a joint fit to the spectra of MAXI J1803-298, respectively, observed by \emph{NuSTAR} and \emph{NICER}/XTI on the same day over the energy range between 0.7-79.0 keV, and found its spin (and the inclination angle i) can be constrained to be close to an extreme value, 0.991 ($i\sim$ $70^{\circ }$), at 68\% confidence interval. The results suggest that MAXI J1803-298 may be a fast-rotating black hole with a large inclination angle.

6 pages, 5 figures

References in corpus (1)

• A New Spin on an Old Black Hole: NuSTAR Spectroscopy of EXO 1846-031

Cited by in corpus (8)

• A Systematic View of Ten New Black Hole Spins
• Systematically Revisiting All NuSTAR Spins of Black Holes in X-Ray Binaries
• Timing Analysis of a New Black Hole Candidate MAXI J1803-298 with Insight-HXMT and NICER
• Reflection and timing study of the transient black hole X-ray binary MAXI J1803-298 with NuSTAR
• Back to business: SLX 1746--331 after 13 years of silence
• Variable ionized disk wind in MAXI J1803-298 revealed by NICER
• The spin measurement of MAXI J0637-430: a black hole candidate with high disk density
• Investigating the consistency of the shape and flux of X-ray reflection spectra in the hard state with an accretion disk reaching close to the black hole