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Discovery of 424 ms pulsations from the radio-quiet neutron star in the PKS 1209-52 supernova remnant

V. E. Zavlin·G. G. Pavlov·D. Sanwal·J. Truemper
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Abstract

The central source of the supernova remnant PKS 1209-52 was observed with the Advanced CCD Imaging Spectrometer aboard Chandra X-ray observatory on 2000 January 6-7. The use of the Continuos Clocking mode allowed us to perform the timing analysis of the data with time resolution of 2.85 ms and to find a period P=0.42412927+/-2.3e-7 s. The detection of this short period proves that the source is a neutron star. It may be either an active pulsar with unfavorably directed radio beam or a truly radio-silent neutron star whose X-ray pulsations are caused by a nonuniform distribution of surface temperature. To infer the actual properties of this neutron star, the period derivative should be measured.

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V. E. Zavlin, G. G. Pavlov, D. Sanwal, J. Truemper. 2000-05-28. Discovery of 424 ms pulsations from the radio-quiet neutron star in the PKS 1209-52 supernova remnant. https://doi.org/10.1086/312866

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