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Return of the Big Glitcher: NICER timing and glitches of PSR J0537−6910

Return of the Big Glitcher: NICER timing and glitches of PSR J0537−6910
Return of the Big Glitcher: NICER timing and glitches of PSR J0537−6910
PSR J0537-6910, also known as the Big Glitcher, is the most prolific glitching pulsar known, and its spin-induced pulsations are only detectable in X-ray. We present results from analysis of 2.7 years of NICER timing observations, from 2017 August to 2020 April. We obtain a rotation phase-connected timing model for the entire timespan, which overlaps with the third observing run of LIGO/Virgo, thus enabling the most sensitive gravitational wave searches of this potentially strong gravitational wave-emitting pulsar. We find that the short-term braking index between glitches decreases towards a value of 7 or lower at longer times since the preceding glitch. By combining NICER and RXTE data, we measure a long-term braking index n=-1.25+/-0.01. Our analysis reveals 8 new glitches, the first detected since 2011, near the end of RXTE, with a total NICER and RXTE glitch activity of 8.88x10^-7 yr^-1. The new glitches follow the seemingly unique time-to-next-glitch---glitch-size correlation established previously using RXTE data, with a slope of 5 d microHz^-1. For one glitch around which NICER observes two days on either side, we search for but do not see clear evidence of spectral nor pulse profile changes that may be associated with the glitch.
Gravitational waves, Pulsars: individual: PSR J0537−6910, Stars: neutron, X-rays: individual: PSR J0537−6910
0035-8711
4605-4614
Ho, Wynn C.G.
d78d4c52-8f92-4846-876f-e04a8f803a45
Espinoza, Cristobal M.
505d9674-e6db-4fa6-bcb3-5365b2d8121c
Arzoumanian, Zaven
5befbba6-f6a1-47c8-ae9e-021c5d854a64
Enoto, Teruaki
71156e16-b84b-41a7-a681-29078a7636cb
Tamba, Tsubasa
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Antonopoulou, Danai
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Bejger, Michal
1699003c-05ed-4f4e-8879-ba7073e2f007
Guillot, Sebastien
26b90302-d8b3-4b06-9254-d3327cac3ccc
Haskell, Brynmor
f2d24be8-4878-4ea0-9c90-21cb0e112c49
Ray, Paul S.
773c1940-2b53-4871-8176-c363521bb83f
Ho, Wynn C.G.
d78d4c52-8f92-4846-876f-e04a8f803a45
Espinoza, Cristobal M.
505d9674-e6db-4fa6-bcb3-5365b2d8121c
Arzoumanian, Zaven
5befbba6-f6a1-47c8-ae9e-021c5d854a64
Enoto, Teruaki
71156e16-b84b-41a7-a681-29078a7636cb
Tamba, Tsubasa
39c92cf7-6dd0-4f78-a480-253b923f323c
Antonopoulou, Danai
3d6a3e07-b935-4270-8ca0-97336266fece
Bejger, Michal
1699003c-05ed-4f4e-8879-ba7073e2f007
Guillot, Sebastien
26b90302-d8b3-4b06-9254-d3327cac3ccc
Haskell, Brynmor
f2d24be8-4878-4ea0-9c90-21cb0e112c49
Ray, Paul S.
773c1940-2b53-4871-8176-c363521bb83f

Ho, Wynn C.G., Espinoza, Cristobal M., Arzoumanian, Zaven, Enoto, Teruaki, Tamba, Tsubasa, Antonopoulou, Danai, Bejger, Michal, Guillot, Sebastien, Haskell, Brynmor and Ray, Paul S. (2020) Return of the Big Glitcher: NICER timing and glitches of PSR J0537−6910. Monthly Notices of the Royal Astronomical Society, 498 (4), 4605-4614. (doi:10.1093/mnras/staa2640).

Record type: Article

Abstract

PSR J0537-6910, also known as the Big Glitcher, is the most prolific glitching pulsar known, and its spin-induced pulsations are only detectable in X-ray. We present results from analysis of 2.7 years of NICER timing observations, from 2017 August to 2020 April. We obtain a rotation phase-connected timing model for the entire timespan, which overlaps with the third observing run of LIGO/Virgo, thus enabling the most sensitive gravitational wave searches of this potentially strong gravitational wave-emitting pulsar. We find that the short-term braking index between glitches decreases towards a value of 7 or lower at longer times since the preceding glitch. By combining NICER and RXTE data, we measure a long-term braking index n=-1.25+/-0.01. Our analysis reveals 8 new glitches, the first detected since 2011, near the end of RXTE, with a total NICER and RXTE glitch activity of 8.88x10^-7 yr^-1. The new glitches follow the seemingly unique time-to-next-glitch---glitch-size correlation established previously using RXTE data, with a slope of 5 d microHz^-1. For one glitch around which NICER observes two days on either side, we search for but do not see clear evidence of spectral nor pulse profile changes that may be associated with the glitch.

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2009.00030 - Accepted Manuscript
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Accepted/In Press date: 26 August 2020
e-pub ahead of print date: 1 September 2020
Published date: November 2020
Keywords: Gravitational waves, Pulsars: individual: PSR J0537−6910, Stars: neutron, X-rays: individual: PSR J0537−6910

Identifiers

Local EPrints ID: 443782
URI: http://eprints.soton.ac.uk/id/eprint/443782
ISSN: 0035-8711
PURE UUID: 907ef70f-b70f-47ca-aff2-a2dc2cd25e45
ORCID for Wynn C.G. Ho: ORCID iD orcid.org/0000-0002-6089-6836

Catalogue record

Date deposited: 11 Sep 2020 16:41
Last modified: 26 Nov 2021 02:54

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Contributors

Author: Wynn C.G. Ho ORCID iD
Author: Cristobal M. Espinoza
Author: Zaven Arzoumanian
Author: Teruaki Enoto
Author: Tsubasa Tamba
Author: Danai Antonopoulou
Author: Michal Bejger
Author: Sebastien Guillot
Author: Brynmor Haskell
Author: Paul S. Ray

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