Radio and Gamma-Ray Timing of a Newly Discovered Millisecond Pulsar
Abstract
We report the discovery and timing of PSR J2147-3604, a fully recycled millisecond pulsar with a spin period of 3.2 ms, discovered in a reprocessing of the 350-MHz Green Bank North Celestial Cap (GBNCC) survey and later serendipitously confirmed by the MeerKAT TRAPUM UHF survey of Fermi-LAT unidentified sources. We followed up this pulsar with Murriyang/Parkes radio telescope and obtained a phase-connected timing solution spanning one year, revealing a 4.5-day binary orbit with very low eccentricity (e ~ 1.9 x 10−5). A follow-up search in LAT data revealed gamma-ray pulsations, allowing for a joint radio and gamma-ray timing analysis. Assuming a neutron-star mass of 1.5 Msun, the inferred median companion mass (~0.2 Msun) is consistent with a helium white dwarf. The pulsar has a low dispersion measure of 17.0 pc cm−3 and shows strong scintillation, leading to it being detected in ~72% of the observations covering the 704-1174 MHz band with Murriyang. The pulsar has a narrow duty cycle of ~6.5%, which leads to individual time of arrival (ToA) uncertainties of ~4.5 us for a 10 min integration with MeerKAT, suggesting this pulsar is well suited for inclusion in PTA experiments.
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BibTeX
@misc{vleeschower2026radio,
title = {{Radio and Gamma-Ray Timing of a Newly Discovered Millisecond Pulsar}},
author = {L. Vleeschower and R. Sengar and L. Nieder and C. J. Clark and D. L. Kaplan and A. Anumarlapudi and R. Girgaonkar and T. Thongmeearkom and G. Y. Agazie and M. Bailes and E. D. Barr and R. P. Breton and M. E. Decesar and T. Dolch and M. Kramer and R. S. Lynch and E. Parent and S. M. Ransom and B. W. Stappers and J. van Leeuwen},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.17247},
eprint = {2610.17247},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.17247},
}
RIS
TY - UNPB
TI - Radio and Gamma-Ray Timing of a Newly Discovered Millisecond Pulsar
AU - L. Vleeschower
AU - R. Sengar
AU - L. Nieder
AU - C. J. Clark
AU - D. L. Kaplan
AU - A. Anumarlapudi
AU - R. Girgaonkar
AU - T. Thongmeearkom
AU - G. Y. Agazie
AU - M. Bailes
AU - E. D. Barr
AU - R. P. Breton
AU - M. E. Decesar
AU - T. Dolch
AU - M. Kramer
AU - R. S. Lynch
AU - E. Parent
AU - S. M. Ransom
AU - B. W. Stappers
AU - J. van Leeuwen
PY - 2026
DA - 2026/10/12
PB - arXiv
DO - 10.48550/arxiv.2610.17247
UR - https://arxiv.org/abs/2610.17247
AB - We report the discovery and timing of PSR J2147-3604, a fully recycled millisecond pulsar with a spin period of 3.2 ms, discovered in a reprocessing of the 350-MHz Green Bank North Celestial Cap (GBNCC) survey and later serendipitously confirmed by the MeerKAT TRAPUM UHF survey of Fermi-LAT unidentified sources. We followed up this pulsar with Murriyang/Parkes radio telescope and obtained a phase-connected timing solution spanning one year, revealing a 4.5-day binary orbit with very low eccentricity (e ~ 1.9 x 10^−5). A follow-up search in LAT data revealed gamma-ray pulsations, allowing for a joint radio and gamma-ray timing analysis. Assuming a neutron-star mass of 1.5 Msun, the inferred median companion mass (~0.2 Msun) is consistent with a helium white dwarf. The pulsar has a low dispersion measure of 17.0 pc cm^−3 and shows strong scintillation, leading to it being detected in ~72% of the observations covering the 704-1174 MHz band with Murriyang. The pulsar has a narrow duty cycle of ~6.5%, which leads to individual time of arrival (ToA) uncertainties of ~4.5 us for a 10 min integration with MeerKAT, suggesting this pulsar is well suited for inclusion in PTA experiments.
ER -