The DOI matches its Crossref record.
A DETERMINATION OF THE SPIN OF THE BLACK HOLE PRIMARY IN LMC X-1
Open accessAbstract
The first extragalactic X-ray binary, LMC X-1, was discovered in 1969. In the 1980s, its compact primary was established as the fourth dynamical black hole candidate. Recently, we published accurate values for the mass of the black hole and the orbital inclination angle of the binary system. Building on these results, we have analyzed 53 X-ray spectra obtained by RXTE and, using a selected sample of 18 of these spectra, we have determined the dimensionless spin parameter of the black hole to be a * = 0.92 +0.05 −0.07 . This result takes into account all sources of observational and model-parameter uncertainties. The standard deviation around the mean value of a * for these 18 X-ray spectra, which were obtained over a span of several years, is only Δ a * = 0.02. When we consider our complete sample of 53 RXTE spectra, we find a somewhat higher value of the spin parameter and a larger standard deviation. Finally, we show that our results based on RXTE data are confirmed by our analyses of selected X-ray spectra obtained by the XMM-Newton , BeppoSAX , and Ginga missions.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cited by
Arvanitaki, A., Dimopoulos, S., Dubovsky, S., Kaloper, N., & March-Russell, J. (2010) · Physical Review D · doi:10.1103/physrevd.81.123530 · Cited by 1,941
Exploring the string axiverse with precision black hole physics
Arvanitaki, A., & Dubovsky, S. (2011) · Physical Review D · doi:10.1103/physrevd.83.044026 · Cited by 667
Observation of Gravitational Waves from Two Neutron Star-Black Hole Coalescences
Abbott, R., Abbott, T. D., Abraham, S., Acernese, F., Ackley, K., Adams, A., Adams, C., Adhikari, R. X., Adya, V. B., Affeldt, C., et al. (2021) · Institutional Repository of Leibniz Universität Hannover (Leibniz Universität Hannover) · doi:10.15488/11385 · Cited by 609
Self-citationDiscovering the QCD axion with black holes and gravitational waves
Arvanitaki, A., Baryakhtar, M., & Huang, X. (2015) · Physical Review D · doi:10.1103/physrevd.91.084011 · Cited by 543
Black Hole Spin via Continuum Fitting and the Role of Spin in Powering Transient Jets
McClintock, J. E., Narayan, R., & Steiner, J. F. (2014) · Space Science Reviews · doi:10.1007/s11214-013-0003-9 · Cited by 332
Self-citation
Metadata
- Authors
- Gou, L., McClintock, J. E., Liu, J., Narayan, R., Steiner, J. F., Remillard, R. A., Orosz, J. A., Davis, S. W., Ebisawa, K., & Schlegel, E. M.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2009-07-29
- Volume
- 701
- Issue
- 2
- Pages
- 1076-1090
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2047424547
- Cited by
- 164
- References
- 0
- FWCI
- 5.83
- Type
- journal article
- Language
- en
- Open access
- bronze
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: A DETERMINATION OF THE SPIN OF THE BLACK HOLE PRIMARY IN LMC X-1. https://app.cochat.ai/papers/10.1088/0004-637x/701/2/1076
- The paper
- Gou, L., McClintock, J. E., Liu, J., Narayan, R., Steiner, J. F., Remillard, R. A., Orosz, J. A., Davis, S. W., Ebisawa, K., & Schlegel, E. M. (2009). A DETERMINATION OF THE SPIN OF THE BLACK HOLE PRIMARY IN LMC X-1. The Astrophysical Journal. https://doi.org/10.1088/0004-637x/701/2/1076
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
