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| Main Authors: | , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2402.09366 |
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| _version_ | 1866913357102055424 |
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| author | 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. |
| author_facet | 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. |
| contents | We have searched for radio pulsations towards 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. Sixteen 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 ($M_c$ $\ll$ 0.1M$_{\odot}$) and hence belong to the class of black widow pulsars. Two have more massive, non-degenerate 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 non-recycled 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_09366 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A 350-MHz Green Bank Telescope Survey of Unassociated Fermi LAT Sources: Discovery and Timing of Ten Millisecond Pulsars 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. High Energy Astrophysical Phenomena We have searched for radio pulsations towards 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. Sixteen 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 ($M_c$ $\ll$ 0.1M$_{\odot}$) and hence belong to the class of black widow pulsars. Two have more massive, non-degenerate 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 non-recycled 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. |
| title | A 350-MHz Green Bank Telescope Survey of Unassociated Fermi LAT Sources: Discovery and Timing of Ten Millisecond Pulsars |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2402.09366 |