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Bangale, P.; Bhattacharyya, B.; Camilo, F.; Clark, C. J.; Cognard, I.; DeCesar, M. E.; Ferrara, E. C.; Gentile, P.; Guillemot, L.; Hessels, J. W. T.; Johnson, T. J.; Kerr, M.; McLaughlin, M. A.; Nieder, L.; Ransom, S. M.; Ray, P. S.; Roberts, M. S. E.; Roy, J.; Sanpa-arsa, S.; Theureau, G.; Wolff, M. T.
Astrophysical journal/The Astrophysical journal, 05/2024, Letnik: 966, Številka: 2Journal Article
Abstract We have searched for radio pulsations toward 49 Fermi Large Area Telescope (LAT) 1FGL Catalog γ -ray sources using the Green Bank Telescope at 350 MHz. We detected 18 millisecond pulsars (MSPs) in blind searches of the data; 10 of these were discoveries unique to our survey. 16 are binaries, with eight having short orbital periods P B < 1 day. No radio pulsations from young pulsars were detected, although three targets are coincident with apparently radio-quiet γ -ray pulsars discovered in LAT data. Here, we give an overview of the survey and present radio and γ -ray timing results for the 10 MSPs discovered. These include the only isolated MSP discovered in our survey and six short- P B binary MSPs. Of these, three have very-low-mass companions ( M c ≪ 0.1 M ⊙ ) and hence belong to the class of black widow pulsars. Two have more massive, nondegenerate companions with extensive radio eclipses and orbitally modulated X-ray emission consistent with the redback class. Significant γ -ray pulsations have been detected from nine of the discoveries. This survey and similar efforts suggest that the majority of Galactic γ -ray sources at high Galactic latitudes are either MSPs or relatively nearby nonrecycled pulsars, with the latter having on average a much smaller radio/ γ -ray beaming ratio as compared to MSPs. It also confirms that past surveys suffered from an observational bias against finding short- P B MSP systems.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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