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Neutron Star Interior Composition Explorer X-Ray Timing of the Radio and γ-Ray Quiet Pulsars PSR J1412+7922 and PSR J1849-0001

2019; IOP Publishing; Volume: 877; Issue: 2 Linguagem: Inglês

10.3847/1538-4357/ab1b2e

1538-4357

Slavko Bogdanov, Wynn C. G. Ho, Teruaki Enoto, Sébastien Guillot, A. K. Harding, Gaurava K. Jaisawal, Christian Malacaria, Sridhar Manthripragada, Zaven Arzoumanian, Keith C. Gendreau,

Gamma-ray bursts and supernovae

We present new timing and spectral analyses of PSR J1412+7922 (Calvera) and PSR J1849-0001, which are only seen as pulsars in X-rays, based on observations conducted with the Neutron Star Interior Composition Explorer (NICER). We obtain updated and substantially improved pulse ephemerides compared to previous X-ray studies, as well as spectra that can be well-fit by simple blackbodies and/or a power law. Our refined timing measurements enable deeper searches for pulsations at other wavelengths and sensitive targeted searches by LIGO/Virgo for continuous gravitational waves from these neutron stars. Using the sensitivity of LIGO's first observing run, we estimate constraints that a gravitational wave search of these pulsars would obtain on the size of their mass deformation and r-mode fluid oscillation.