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  Discovery of a Gamma-ray Black Widow Pulsar by GPU-accelerated Einstein@Home

Nieder, L., Clark, C. J., Kandel, D., Romani, R. W., Bassa, C. G., Allen, B., et al. (2020). Discovery of a Gamma-ray Black Widow Pulsar by GPU-accelerated Einstein@Home. The Astrophysical Journal Letters, 902: L46. doi:10.3847/2041-8213/abbc02.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0007-0F95-1 Version Permalink: http://hdl.handle.net/21.11116/0000-0007-6073-B
Genre: Journal Article

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 Creators:
Nieder, L.1, Author              
Clark, C. J., Author
Kandel, D., Author
Romani, R. W., Author
Bassa, C. G., Author
Allen, B.1, Author              
Ashok, A.2, Author              
Cognard, I., Author
Fehrmann, H.1, Author              
Freire, P., Author
Karuppusamy, R., Author
Kramer, M., Author
Li, D., Author
Machenschalk, B.1, Author              
Pan, Z., Author
Papa, M. A.2, Author              
Ransom, S. M., Author
Ray, P. S., Author
Roy, J., Author
Wang, P., Author
Wu, J., AuthorAulbert, C.1, Author              Barr, E. D., AuthorBeheshtipour, B.2, Author              Behnke, O.1, Author              Bhattacharyya, B., AuthorBreton, R. P., AuthorCamilo, F., AuthorChoquet, C., AuthorDhillon, V. S., AuthorFerrara, E. C., AuthorGuillemot, L., AuthorHessels, J. W. T., AuthorKerr, M., AuthorKwang, S. A., AuthorMarsh, T. R., AuthorMickaliger, M. B., AuthorPleunis, Z., AuthorPletsch, H.3, Author              Roberts, M. S. E., AuthorSanpa-arsa, S., AuthorSteltner, B.2, Author               more..
Affiliations:
1Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24011              
2Searching for Continuous Gravitational Waves, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_2630691              
3Pulsar Observation and Data Analysis, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_2253649              

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Free keywords: Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE
 Abstract: We report the discovery of 1.97ms-period gamma-ray pulsations from the 75-minute orbital-period binary pulsar now named PSR J1653-0158. The associated Fermi-Large Area Telescope gamma-ray source 4FGL J1653.6-0158 has long been expected to harbor a binary millisecond pulsar. Despite the pulsar-like gamma-ray spectrum and candidate optical/X-ray associations -- whose periodic brightness modulations suggested an orbit -- no radio pulsations had been found in many searches. The pulsar was discovered by directly searching the gamma-ray data using the GPU-accelerated Einstein@Home distributed volunteer computing system. The multi-dimensional parameter space was bounded by positional and orbital constraints obtained from the optical counterpart. More sensitive analyses of archival and new radio data using knowledge of the pulsar timing solution yield very stringent upper limits on radio emission. Any radio emission is thus either exceptionally weak, or eclipsed for a large fraction of the time. The pulsar has one of the three lowest inferred surface magnetic-field strengths of any known pulsar with $B_{\rm surf} \approx 4 \times 10^{7}\,$G. The resulting mass function, combined with models of the companion star's optical light curve and spectra, suggest a pulsar mass $\gtrsim 2\,M_{\odot}$. The companion is light-weight with mass $\sim 0.01\,M_{\odot}$, and the orbital period is the shortest known for any rotation-powered binary pulsar. This discovery demonstrates the Fermi-Large Area Telescope's potential to discover extreme pulsars that would otherwise remain undetected.

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 Dates: 2020-09-032020-09-042020
 Publication Status: Published in print
 Pages: 12 pages, 6 figures, submitted to ApJL
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: arXiv: 2009.01513
URI: http://arxiv.org/abs/2009.01513
DOI: 10.3847/2041-8213/abbc02
 Degree: -

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Title: The Astrophysical Journal Letters
Source Genre: Journal
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Pages: - Volume / Issue: 902 Sequence Number: L46 Start / End Page: - Identifier: -