Pith. sign in

REVIEW 3 cited by

Estimating the Spin of Stellar-Mass Black Holes via Spectral Fitting of the X-ray Continuum

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv astro-ph/0508302 v2 pith:XG6W3FUL submitted 2005-08-14 astro-ph gr-qc

Rebecca Shafee , Jeffrey E. McClintock , Ramesh Narayan , Shane W. Davis , Li-Xin Li , Ronald A. Remillard This is my paper
classification astro-phgr-qc
keywords blackdataestimateholesspectralspinj1655-40rxte
verification ladder T0 review T1 audit T2 compute T3 formal
0 comments
read the original abstract

We fit X-ray spectral data in the thermal dominant or high soft state of two dynamically confirmed black holes, GRO J1655-40 and 4U 1543-47, and estimate the dimensionless spin parameters a* = a/M of the two holes. For GRO J1655-40, using a spectral hardening factor computed for a non-LTE relativistic accretion disk, we estimate a* ~ 0.75 and ~ 0.65-0.75, respectively, from ASCA and RXTE data. For 4U 1543-47, we estimate a* ~ 0.75-0.85 from RXTE data. Thus, neither black hole has a spin approaching the theoretical maximum a* = 1.

Discussion (0). Sign in to comment.

Forward citations

Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Simulation-Based Prediction of Black Hole Fe K$\alpha$ Line Profiles

    astro-ph.HE 2026-05 conditional novelty 6.0 of 10

    Fe Kα lines from accreting black holes are produced mostly outside 10 gravitational radii due to radial ionization gradients, allowing broad profiles without high spin.

  2. Regular Rotating Black Hole: Probing the boundaries of the Radiative Signatures and Jet Power

    astro-ph.HE 2025-08 conditional novelty 5.0 of 10

    MOG regular rotating black holes are compatible with most X-ray binary data only for beta below about 0.38 to 0.4, and are excluded for the near-extremal source GRS 1915+105.

  3. Epicyclic oscillations and accretion disk around a special Buchdahl-inspired spacetime

    gr-qc 2025-07 conditional novelty 4.0 of 10

    The Buchdahl-inspired metric shifts the ISCO inward for positive k tilde and produces QPO and disk profiles that the authors fit to microquasar data, claiming 0.03<k<0.19.

Pith tools