The DOI matches its Crossref record; 9 of the 9 references it cites were found in a registry or an index.
Clock comparison using black holes
Overview
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
In the citing paper
“Hence, the VLBI technique can be used for time transfer and relativistic geodesy applications ( cf. Wang et al., 2019; Haas, 2020).”
From Time transfer and significance of vertical land motion in relativistic geodesy applications: a review paper (2023) · cites this paper as Haas, 2020
Citations
Cites
(2019) · doi:10.1103/physrevlett.123.033201 · Cited by 711
Fey, A. L., Gordon, D., Jacobs, C. S., Ma, C., Gaume, R. A., Arias, E. F., Bianco, G., Boboltz, D. A., Böckmann, S., Bolotin, S., et al. (2015) · The Astronomical Journal · doi:10.1088/0004-6256/150/2/58 · Cited by 289
The CIPM list of recommended frequency standard values: guidelines and procedures
Riehle, F., Gill, P., Arias, F., & Robertsson, L. (2018) · Metrologia · doi:10.1088/1681-7575/aaa302 · Cited by 281
Ojha, R. (2015) · Maryland Shared Open Access Repository (USMAI Consortium) · doi:10.13016/m2fajr-3qls · Cited by 253
Nothnagel, A., Artz, T., Behrend, D., & Malkin, Z. (2017) · Journal of Geodesy · doi:10.1007/s00190-016-0950-5 · Cited by 215
Niell, A. E., Barrett, J., Burns, A. G., Cappallo, R. J., Corey, B. E., Derome, M., Eckert, C., Elósegui, P., McWhirter, R., Poirier, M., et al. (2018) · Radio Science · doi:10.1029/2018rs006617 · Cited by 101
Denker, H., Timmen, L., Voigt, C., Weyers, S., Peik, E., Margolis, H. S., Delva, P., Wolf, P., & Petit, G. (2018) · Journal of Geodesy · doi:10.1007/s00190-017-1075-1 · Cited by 91
Intercontinental comparison of optical atomic clocks through very long baseline interferometry
Pizzocaro, M., Sekido, M., Takefuji, K., Ujihara, H., Hachisu, H., Nemitz, N., Tsutsumi, M., Kondo, T., Kawai, E., Ichikawa, R., et al. (2021) · Nature Physics · doi:10.1038/s41567-020-01038-6 · Cited by 64
Anderson, J. M., & Xu, M. (2018) · Journal of Geophysical Research Solid Earth · doi:10.1029/2018jb015550 · Cited by 46
Cited by
Sekido, M., Takefuji, K., Ujihara, H., Kondo, T., Tsutsumi, M., Kawai, E., Hachisu, H., Nemitz, N., Pizzocaro, M., Clivati, C., et al. (2021) · Journal of Geodesy · doi:10.1007/s00190-021-01479-8 · Cited by 13
Bagherbandi, M., Shirazian, M., Amin, H., & Horemuz, M. (2023) · Frontiers in Earth Science · doi:10.3389/feart.2023.1139211 · Cited by 2
“Hence, the VLBI technique can be used for time transfer and relativistic geodesy applications (cf.Wang et al., 2019; Haas, 2020).”
Method
Metadata
- Authors
- Haas, R.
- Affiliations
- Chalmers University of Technology (SE)
- Corresponding author
- Haas, Rüdiger
- ORCID
- Haas, Rüdiger
- Venue
- Nature Physics
- Published
- 2020-10-29
- Volume
- 17
- Issue
- 2
- Pages
- 164-165
- ISSN
- 1745-2473 (ISSN-L)
- 1745-2481
- OpenAlex
- W3096907248
- Cited by
- 2
- References
- 9
- Citations by year
- 2023: 1 · 2021: 1
- FWCI
- 0.22
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- www.springer.com/tdm (tdm)
- www.springer.com/tdm (vor)
- Locations
- Nature Physics (publishedVersion)
- Chalmers Research (Chalmers University of Technology) (submittedVersion)
- Topics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysical Phenomena and Observations
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Pulsars and Gravitational Waves Research
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Advanced Frequency and Time Standards
- Keywords
- black hole accretion, early universe, clock comparison, very long baseline interferometry, gravitational waves
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 ›
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How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: Clock comparison using black holes. https://app.cochat.ai/papers/10.1038/s41567-020-01071-5
- The paper
- Haas, R. (2021). Clock comparison using black holes. Nature Physics. https://doi.org/10.1038/s41567-020-01071-5
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.
