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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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 Creators:
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., Author           
Papa, M. A.2, Author           
Ray , P. S., Author
Steltner, B.2, Author           
Verbiest , J. P. W., 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              

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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
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Degree: -

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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: -