Three millisecond pulsars in Fermi LAT unassociated bright sources

S. M. Ransom, P. S. Ray, F. Camilo, Mallory Roberts, Ö Çelik, M. T. Wolff, C. C. Cheung, M. Kerr, T. Pennucci, M. E. Decesar, I. Cognard, A. G. Lyne, B. W. Stappers, P. C.C. Freire, J. E. Grove, A. A. Abdo, G. Desvignes, D. Donato, E. C. Ferrara, N. GehrelsL. Guillemot, C. Gwon, A. K. Harding, S. Johnston, M. Keith, M. Kramer, P. F. Michelson, D. Parent, P. M.Saz Parkinson, R. W. Romani, D. A. Smith, G. Theureau, D. J. Thompson, P. Weltevrede, K. S. Wood, M. Ziegler

Research output: Contribution to journalArticle

Abstract

We searched for radio pulsars in 25 of the non-variable, unassociated sources in the Fermi LAT Bright Source List with the Green Bank Telescope at 820 MHz. We report the discovery of three radio and γ-ray millisecond pulsars (MSPs) from a high Galactic latitude subset of these sources. All of the pulsars are in binary systems, which would have made them virtually impossible to detect in blind γ-ray pulsation searches. They seem to be relatively normal, nearby (≤2 kpc) MSPs. These observations, in combination with the Fermi detection of γ-rays from other known radio MSPs, imply that most, if not all, radio MSPs are efficient γ-ray producers. The γ-ray spectra of the pulsars are power law in nature with exponential cutoffs at a few GeV, as has been found with most other pulsars. The MSPs have all been detected as X-ray point sources. Their soft X-ray luminosities of ∼10 30-1031 erg s-1 are typical of the rare radio MSPs seen in X-rays.

Original languageEnglish (US)
JournalAstrophysical Journal Letters
Volume727
Issue number1 PART II
DOIs
StatePublished - Jan 20 2011

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pulsars
radio
rays
erg
point source
power law
x rays
lists
point sources
set theory
cut-off
luminosity
telescopes

Keywords

  • Pulsars: general

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Ransom, S. M., Ray, P. S., Camilo, F., Roberts, M., Çelik, Ö., Wolff, M. T., ... Ziegler, M. (2011). Three millisecond pulsars in Fermi LAT unassociated bright sources. Astrophysical Journal Letters, 727(1 PART II). https://doi.org/10.1088/2041-8205/727/1/L16

Three millisecond pulsars in Fermi LAT unassociated bright sources. / Ransom, S. M.; Ray, P. S.; Camilo, F.; Roberts, Mallory; Çelik, Ö; Wolff, M. T.; Cheung, C. C.; Kerr, M.; Pennucci, T.; Decesar, M. E.; Cognard, I.; Lyne, A. G.; Stappers, B. W.; Freire, P. C.C.; Grove, J. E.; Abdo, A. A.; Desvignes, G.; Donato, D.; Ferrara, E. C.; Gehrels, N.; Guillemot, L.; Gwon, C.; Harding, A. K.; Johnston, S.; Keith, M.; Kramer, M.; Michelson, P. F.; Parent, D.; Parkinson, P. M.Saz; Romani, R. W.; Smith, D. A.; Theureau, G.; Thompson, D. J.; Weltevrede, P.; Wood, K. S.; Ziegler, M.

In: Astrophysical Journal Letters, Vol. 727, No. 1 PART II, 20.01.2011.

Research output: Contribution to journalArticle

Ransom, SM, Ray, PS, Camilo, F, Roberts, M, Çelik, Ö, Wolff, MT, Cheung, CC, Kerr, M, Pennucci, T, Decesar, ME, Cognard, I, Lyne, AG, Stappers, BW, Freire, PCC, Grove, JE, Abdo, AA, Desvignes, G, Donato, D, Ferrara, EC, Gehrels, N, Guillemot, L, Gwon, C, Harding, AK, Johnston, S, Keith, M, Kramer, M, Michelson, PF, Parent, D, Parkinson, PMS, Romani, RW, Smith, DA, Theureau, G, Thompson, DJ, Weltevrede, P, Wood, KS & Ziegler, M 2011, 'Three millisecond pulsars in Fermi LAT unassociated bright sources', Astrophysical Journal Letters, vol. 727, no. 1 PART II. https://doi.org/10.1088/2041-8205/727/1/L16
Ransom, S. M. ; Ray, P. S. ; Camilo, F. ; Roberts, Mallory ; Çelik, Ö ; Wolff, M. T. ; Cheung, C. C. ; Kerr, M. ; Pennucci, T. ; Decesar, M. E. ; Cognard, I. ; Lyne, A. G. ; Stappers, B. W. ; Freire, P. C.C. ; Grove, J. E. ; Abdo, A. A. ; Desvignes, G. ; Donato, D. ; Ferrara, E. C. ; Gehrels, N. ; Guillemot, L. ; Gwon, C. ; Harding, A. K. ; Johnston, S. ; Keith, M. ; Kramer, M. ; Michelson, P. F. ; Parent, D. ; Parkinson, P. M.Saz ; Romani, R. W. ; Smith, D. A. ; Theureau, G. ; Thompson, D. J. ; Weltevrede, P. ; Wood, K. S. ; Ziegler, M. / Three millisecond pulsars in Fermi LAT unassociated bright sources. In: Astrophysical Journal Letters. 2011 ; Vol. 727, No. 1 PART II.
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AU - Ray, P. S.

AU - Camilo, F.

AU - Roberts, Mallory

AU - Çelik, Ö

AU - Wolff, M. T.

AU - Cheung, C. C.

AU - Kerr, M.

AU - Pennucci, T.

AU - Decesar, M. E.

AU - Cognard, I.

AU - Lyne, A. G.

AU - Stappers, B. W.

AU - Freire, P. C.C.

AU - Grove, J. E.

AU - Abdo, A. A.

AU - Desvignes, G.

AU - Donato, D.

AU - Ferrara, E. C.

AU - Gehrels, N.

AU - Guillemot, L.

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AU - Harding, A. K.

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AU - Keith, M.

AU - Kramer, M.

AU - Michelson, P. F.

AU - Parent, D.

AU - Parkinson, P. M.Saz

AU - Romani, R. W.

AU - Smith, D. A.

AU - Theureau, G.

AU - Thompson, D. J.

AU - Weltevrede, P.

AU - Wood, K. S.

AU - Ziegler, M.

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N2 - We searched for radio pulsars in 25 of the non-variable, unassociated sources in the Fermi LAT Bright Source List with the Green Bank Telescope at 820 MHz. We report the discovery of three radio and γ-ray millisecond pulsars (MSPs) from a high Galactic latitude subset of these sources. All of the pulsars are in binary systems, which would have made them virtually impossible to detect in blind γ-ray pulsation searches. They seem to be relatively normal, nearby (≤2 kpc) MSPs. These observations, in combination with the Fermi detection of γ-rays from other known radio MSPs, imply that most, if not all, radio MSPs are efficient γ-ray producers. The γ-ray spectra of the pulsars are power law in nature with exponential cutoffs at a few GeV, as has been found with most other pulsars. The MSPs have all been detected as X-ray point sources. Their soft X-ray luminosities of ∼10 30-1031 erg s-1 are typical of the rare radio MSPs seen in X-rays.

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