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2022ApJ...927..139O - Astrophys. J., 927, 139-139 (2022/March-2)

Identification of an X-Ray Pulsar in the BeXRB System IGR J18219-1347.

O'CONNOR B., GOGUS E., HUPPENKOTHEN D., KOUVELIOTOU C., GORGONE N., TOWNSEND L.J., CALAMIDA A., FRUCHTER A., BUCKLEY D.A.H., BARING M.G., KENNEA J.A., YOUNES G., ARZOUMANIAN Z., BELLM E., CENKO S.B., GENDREAU K., GRANOT J., HAILEY C., HARRISON F., HARTMANN D., KAPER L., KUTYREV A., SLANE P.O., STERN D., TROJA E., VAN DER HORST A.J., WIJERS R.A.M.J. and WOUDT P.

Abstract (from CDS):

We report on observations of the candidate Be/X-ray binary (BeXRB) IGR J18219-1347 with the Swift/X-ray Telescope, the Nuclear Spectroscopic Telescope ARray, and the Neutron Star Interior Composition Explorer during Type-I outbursts in 2020 March and June. Our timing analysis revealed the spin period of a neutron star with Pspin = 52.46 s. This periodicity, combined with the known orbital period of 72.4 days, indicates that the system is a BeXRB. Furthermore, by comparing the spectral energy distribution of the infrared counterpart to that of known BeXRBs, we confirm this classification and set a distance of approximately 10-15 kpc for the source. The broadband X-ray spectrum (1.5-50 keV) of the source is described by an absorbed power law with a photon index Γ ∼ 0.5 and a cutoff energy at ∼13 keV.

Abstract Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): X-ray astronomy - High mass x-ray binary stars - Pulsars - Neutron stars

Simbad objects: 7

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