Targeted millisecond pulsar surveys of Fermi gamma-ray sources with LOFAR
C.G. Bassa, Z. Pleunis, J.W.T. Hessels, E.C. Ferrara, V.I. Kondratiev,, S. Sanidas, A.G. Lyne, B.W. Stappers, S.M. Ransom, the Fermi Pulsar Search, Consortium
TL;DR
This paper reports on LOFAR's targeted millisecond pulsar surveys of Fermi gamma-ray sources, employing a novel semi-coherent dedispersion method at 135 MHz, resulting in the discovery of three new pulsars.
Contribution
The paper introduces a new semi-coherent dedispersion technique for pulsar surveys and demonstrates its effectiveness by discovering three millisecond pulsars.
Findings
Discovered three new millisecond pulsars.
Developed a semi-coherent dedispersion method.
Successfully surveyed Fermi gamma-ray sources.
Abstract
We have used LOFAR to perform targeted millisecond pulsar surveys of Fermi gamma-ray sources. Operating at a center frequency of 135 MHz, the surveys use a novel semi-coherent dedispersion approach where coherently dedispersed trials at coarsely separated dispersion measures are incoherently dedispersed at finer steps. Three millisecond pulsars have been discovered as part of these surveys. We describe the LOFAR surveys and the properties of the newly discovered pulsars.
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