Detection of pulsed X-ray emission from XMM-Newton observations of PSR J0538+2817

K. E. McGowan; J. A. Kennea; S. Zane; F. A. Córdova; M. Cropper; C. Ho; T. Sasseen; W. T. Vestrand

doi:10.1086/375332

Detection of pulsed X-ray emission from XMM-Newton observations of PSR J0538+2817

K. E. McGowan, J. A. Kennea, S. Zane, F. A. Córdova, M. Cropper, C. Ho, T. Sasseen, W. T. Vestrand

Astronomy & Astrophysics

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Abstract

We report on the XMM-Newton observations of the 143 ms pulsar PSR J0538+2817. We present evidence for the first detections of pulsed X-rays from the source at a frequency that is consistent with the predicted radio frequency. The pulse profile is broad and asymmetric, with a pulse fraction of 18% ± 3%. We find that the spectrum of the source is well-fitted with a blackbody with T^∞ = (2.12_-0.03^+0.04) × 10⁶ K and N_H = 2.5 × 10²¹ cm ^-2. The radius determined from the model fit of 1.68 × 0.05 km suggests that the emission is from a heated polar cap. A fit to the spectra with an atmospheric model reduces the inferred temperature and, hence, increases the radius of the emitting region; however, the pulsar distance determined from the fit is then smaller than the dispersion distance.

Original language	English (US)
Pages (from-to)	380-387
Number of pages	8
Journal	Astrophysical Journal
Volume	591
Issue number	1 I
DOIs	https://doi.org/10.1086/375332
State	Published - Jul 1 2003

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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@article{df67deb99f104b7fb2f24b420360fb31,

title = "Detection of pulsed X-ray emission from XMM-Newton observations of PSR J0538+2817",

abstract = "We report on the XMM-Newton observations of the 143 ms pulsar PSR J0538+2817. We present evidence for the first detections of pulsed X-rays from the source at a frequency that is consistent with the predicted radio frequency. The pulse profile is broad and asymmetric, with a pulse fraction of 18\% ± 3\%. We find that the spectrum of the source is well-fitted with a blackbody with T∞ = (2.12-0.03+0.04) × 106 K and NH = 2.5 × 1021 cm -2. The radius determined from the model fit of 1.68 × 0.05 km suggests that the emission is from a heated polar cap. A fit to the spectra with an atmospheric model reduces the inferred temperature and, hence, increases the radius of the emitting region; however, the pulsar distance determined from the fit is then smaller than the dispersion distance.",

author = "McGowan, \{K. E.\} and Kennea, \{J. A.\} and S. Zane and C{\'o}rdova, \{F. A.\} and M. Cropper and C. Ho and T. Sasseen and Vestrand, \{W. T.\}",

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T1 - Detection of pulsed X-ray emission from XMM-Newton observations of PSR J0538+2817

AU - McGowan, K. E.

AU - Kennea, J. A.

AU - Zane, S.

AU - Córdova, F. A.

AU - Cropper, M.

AU - Ho, C.

AU - Sasseen, T.

AU - Vestrand, W. T.

PY - 2003/7/1

Y1 - 2003/7/1

N2 - We report on the XMM-Newton observations of the 143 ms pulsar PSR J0538+2817. We present evidence for the first detections of pulsed X-rays from the source at a frequency that is consistent with the predicted radio frequency. The pulse profile is broad and asymmetric, with a pulse fraction of 18% ± 3%. We find that the spectrum of the source is well-fitted with a blackbody with T∞ = (2.12-0.03+0.04) × 106 K and NH = 2.5 × 1021 cm -2. The radius determined from the model fit of 1.68 × 0.05 km suggests that the emission is from a heated polar cap. A fit to the spectra with an atmospheric model reduces the inferred temperature and, hence, increases the radius of the emitting region; however, the pulsar distance determined from the fit is then smaller than the dispersion distance.

AB - We report on the XMM-Newton observations of the 143 ms pulsar PSR J0538+2817. We present evidence for the first detections of pulsed X-rays from the source at a frequency that is consistent with the predicted radio frequency. The pulse profile is broad and asymmetric, with a pulse fraction of 18% ± 3%. We find that the spectrum of the source is well-fitted with a blackbody with T∞ = (2.12-0.03+0.04) × 106 K and NH = 2.5 × 1021 cm -2. The radius determined from the model fit of 1.68 × 0.05 km suggests that the emission is from a heated polar cap. A fit to the spectra with an atmospheric model reduces the inferred temperature and, hence, increases the radius of the emitting region; however, the pulsar distance determined from the fit is then smaller than the dispersion distance.

UR - https://www.scopus.com/pages/publications/0042155571

UR - https://www.scopus.com/inward/citedby.url?scp=0042155571&partnerID=8YFLogxK

U2 - 10.1086/375332

DO - 10.1086/375332

M3 - Article

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SN - 0004-637X

VL - 591

SP - 380

EP - 387

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 I

ER -

Detection of pulsed X-ray emission from XMM-Newton observations of PSR J0538+2817

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