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Six new millisecond pulsars from arecibo searches of fermi gamma-ray sources

We have discovered six radio millisecond pulsars (MSPs) in a search with the Arecibo telescope of 34 unidentified gamma-ray sources from the Fermi Large Area Telescope (LAT) four year point source catalog. Among the 34 sources, we also detected two MSPs previously discovered elsewhere. Each source w... Full description

Journal Title: The Astrophysical Journal 2016, Vol.819(1), p.34 (9pp)
Main Author: Cromartie, H. T.
Other Authors: Camilo, F. , Kerr, M. , Deneva, J. S. , Ransom, S. M. , Ray, P. S. , Ferrara, E. C. , Michelson, P. F. , Wood, K. S.
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0004-637X ; E-ISSN: 1538-4357 ; DOI: 10.3847/0004-637X/819/1/34
Link: http://dx.doi.org/10.3847/0004-637X/819/1/34
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recordid: iop10.3847/0004-637X/819/1/34
title: Six new millisecond pulsars from arecibo searches of fermi gamma-ray sources
format: Article
creator:
  • Cromartie, H. T.
  • Camilo, F.
  • Kerr, M.
  • Deneva, J. S.
  • Ransom, S. M.
  • Ray, P. S.
  • Ferrara, E. C.
  • Michelson, P. F.
  • Wood, K. S.
subjects:
  • Astrophysics - High Energy Astrophysical Phenomena
  • Astrophysics - Solar And Stellar Astrophysics
ispartof: The Astrophysical Journal, 2016, Vol.819(1), p.34 (9pp)
description: We have discovered six radio millisecond pulsars (MSPs) in a search with the Arecibo telescope of 34 unidentified gamma-ray sources from the Fermi Large Area Telescope (LAT) four year point source catalog. Among the 34 sources, we also detected two MSPs previously discovered elsewhere. Each source was observed at a center frequency of 327 MHz, typically at three epochs with individual integration times of 15 minutes. The new MSP spin periods range from 1.99 to 4.66 ms. Five of the six pulsars are in interacting compact binaries (period ≤ 8.1 hr), while the sixth is a more typical neutron star-white dwarf binary with an 83 day orbital period. This is a higher proportion of interacting binaries than for equivalent Fermi -LAT searches elsewhere. The reason is that Arecibo's large gain afforded us the opportunity to limit integration times to 15 minutes, which significantly increased our sensitivity to these highly accelerated systems. Seventeen of the remaining 26 gamma-ray sources are still categorized as strong MSP candidates, and will be re-searched.
language: eng
source:
identifier: ISSN: 0004-637X ; E-ISSN: 1538-4357 ; DOI: 10.3847/0004-637X/819/1/34
fulltext: fulltext
issn:
  • 0004-637X
  • 1538-4357
  • 0004637X
  • 15384357
url: Link


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titleSix new millisecond pulsars from arecibo searches of fermi gamma-ray sources
creatorCromartie, H. T. ; Camilo, F. ; Kerr, M. ; Deneva, J. S. ; Ransom, S. M. ; Ray, P. S. ; Ferrara, E. C. ; Michelson, P. F. ; Wood, K. S.
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descriptionWe have discovered six radio millisecond pulsars (MSPs) in a search with the Arecibo telescope of 34 unidentified gamma-ray sources from the Fermi Large Area Telescope (LAT) four year point source catalog. Among the 34 sources, we also detected two MSPs previously discovered elsewhere. Each source was observed at a center frequency of 327 MHz, typically at three epochs with individual integration times of 15 minutes. The new MSP spin periods range from 1.99 to 4.66 ms. Five of the six pulsars are in interacting compact binaries (period ≤ 8.1 hr), while the sixth is a more typical neutron star-white dwarf binary with an 83 day orbital period. This is a higher proportion of interacting binaries than for equivalent Fermi -LAT searches elsewhere. The reason is that Arecibo's large gain afforded us the opportunity to limit integration times to 15 minutes, which significantly increased our sensitivity to these highly accelerated systems. Seventeen of the remaining 26 gamma-ray sources are still categorized as strong MSP candidates, and will be re-searched.
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abstractWe have discovered six radio millisecond pulsars (MSPs) in a search with the Arecibo telescope of 34 unidentified gamma-ray sources from the Fermi Large Area Telescope (LAT) four year point source catalog. Among the 34 sources, we also detected two MSPs previously discovered elsewhere. Each source was observed at a center frequency of 327 MHz, typically at three epochs with individual integration times of 15 minutes. The new MSP spin periods range from 1.99 to 4.66 ms. Five of the six pulsars are in interacting compact binaries (period ≤ 8.1 hr), while the sixth is a more typical neutron star-white dwarf binary with an 83 day orbital period. This is a higher proportion of interacting binaries than for equivalent Fermi -LAT searches elsewhere. The reason is that Arecibo's large gain afforded us the opportunity to limit integration times to 15 minutes, which significantly increased our sensitivity to these highly accelerated systems. Seventeen of the remaining 26 gamma-ray sources are still categorized as strong MSP candidates, and will be re-searched.
doi10.3847/0004-637X/819/1/34
date2016-03-01