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  Detection and timing of gamma-ray pulsations from the 707-Hz pulsar J0952-0607

Nieder, L., Clark, C. J., Bassa, C. G., Wu, J., Singh, A., Donner, J. Y., et al. (2019). Detection and timing of gamma-ray pulsations from the 707-Hz pulsar J0952-0607. The Astrophysical Journal, 883(1): 42. doi:10.3847/1538-4357/ab357e.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-CCC8-6 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-D1FC-4
Genre: Journal Article

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Nieder, L.1, Author              
Clark, C. J., Author
Bassa, C. G., Author
Wu, J., Author
Singh, A.2, Author              
Donner, J. Y., Author
Allen, B.1, Author              
Breton, R. P., Author
Dhillon, V. S., Author
Eggenstein, H.-B.1, Author              
Hessels, J. W. T., Author
Kennedy, M. R., Author
Kerr, M., Author
Littlefair, S., Author
Marsh, T. R., Author
Sánchez, D. Mata, Author
Papa, M. A.3, Author              
Ray , P. S., Author
Steltner, B.2, Author              
Verbiest , J. P. W., Author
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              
3Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1933290              

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Free keywords: Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE
 Abstract: The LOFAR radio telescope discovered the $707$-Hz binary millisecond pulsar J0952$-$0607 in a targeted radio pulsation search of an unidentified $\textit{Fermi}$ gamma-ray source. This source shows a weak energy flux of $F_\gamma = 2.6 \times 10^{-12}\,\text{erg}\,\text{cm}^{-2}\,\text{s}^{-1}$ in the energy range between $100\,\text{MeV} - 100\,\text{GeV}$. Here we report the detection of pulsed gamma-ray emission from PSR$\,$J0952$-$0607 in a very sensitive gamma-ray pulsation search. The pulsar's rotational, binary and astrometric properties are measured over seven years of $\textit{Fermi}$-Large Area Telescope data. For this we take into account the uncertainty on the shape of the gamma-ray pulse profile. We present an updated radio timing solution now spanning more than two years and show results from optical modeling of the black-widow-type companion based on new multi-band photometric data taken with HiPERCAM on the Gran Telescopio Canarias on La Palma and ULTRACAM on the New Technology Telescope at ESO La Silla. PSR$\,$J0952$-$0607 is now the fastest-spinning pulsar for which the intrinsic spin-down rate has been reliably constrained ($\dot{P}_\text{int} < 4.6 \times 10^{-21}\,\text{s}\,\text{s}^{-1}$). The inferred surface magnetic field strength of $B_\text{surf} \lesssim 8.2 \times 10^{7}\,\text{G}$ is among the ten lowest of all known pulsars. This discovery is another example of an extremely fast spinning black-widow pulsar hiding within an unidentified $\textit{Fermi}$ gamma-ray source. In the future such systems might help to pin down the maximum spin frequency and the minimum surface magnetic field strength of millisecond pulsars.

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 Dates: 2019-05-272019
 Publication Status: Published in print
 Pages: 22 pages, 7 figures
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 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1905.11352
URI: http://arxiv.org/abs/1905.11352
DOI: 10.3847/1538-4357/ab357e
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Title: The Astrophysical Journal
Source Genre: Journal
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Pages: - Volume / Issue: 883 (1) Sequence Number: 42 Start / End Page: - Identifier: -