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Title: Three millisecond pulsars in FERMI LAT unassociated bright sources

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. Here, 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. Finally, their soft X-ray luminosities of ~1030-1031 erg s–1 are typical of the rare radio MSPs seen in X-rays.

Authors:
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Publication Date:
Research Org.:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Org.:
USDOE; National Aeronautics and Space Administration (NASA)
Contributing Org.:
The Fermi LAT Collaboration
OSTI Identifier:
1357271
Grant/Contract Number:  
AC02-76SF00515; NNG09EE57I
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal. Letters
Additional Journal Information:
Journal Volume: 727; Journal Issue: 1; Journal ID: ISSN 2041-8205
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; pulsars

Citation Formats

Ransom, S. M., Ray, P. S., Camilo, F., Roberts, M. S. E., 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., Saz Parkinson, P. M., Romani, R. W., Smith, D. A., Theureau, G., Thompson, D. J., Weltevrede, P., Wood, K. S., and Ziegler, M. Three millisecond pulsars in FERMI LAT unassociated bright sources. United States: N. p., 2010. Web. doi:10.1088/2041-8205/727/1/L16.
Ransom, S. M., Ray, P. S., Camilo, F., Roberts, M. S. E., 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., Saz Parkinson, P. M., 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. United States. https://doi.org/10.1088/2041-8205/727/1/L16
Ransom, S. M., Ray, P. S., Camilo, F., Roberts, M. S. E., 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., Saz Parkinson, P. M., Romani, R. W., Smith, D. A., Theureau, G., Thompson, D. J., Weltevrede, P., Wood, K. S., and Ziegler, M. Thu . "Three millisecond pulsars in FERMI LAT unassociated bright sources". United States. https://doi.org/10.1088/2041-8205/727/1/L16. https://www.osti.gov/servlets/purl/1357271.
@article{osti_1357271,
title = {Three millisecond pulsars in FERMI LAT unassociated bright sources},
author = {Ransom, S. M. and Ray, P. S. and Camilo, F. and Roberts, M. S. E. and Çelik, Ö. and Wolff, M. T. and Cheung, C. C. and Kerr, M. and Pennucci, T. and DeCesar, M. E. and Cognard, I. and Lyne, A. G. and Stappers, B. W. and Freire, P. C. C. and Grove, J. E. and Abdo, A. A. and Desvignes, G. and Donato, D. and Ferrara, E. C. and Gehrels, N. and Guillemot, L. and Gwon, C. and Harding, A. K. and Johnston, S. and Keith, M. and Kramer, M. and Michelson, P. F. and Parent, D. and Saz Parkinson, P. M. and Romani, R. W. and Smith, D. A. and Theureau, G. and Thompson, D. J. and Weltevrede, P. and Wood, K. S. and Ziegler, M.},
abstractNote = {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. Here, 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. Finally, their soft X-ray luminosities of ~1030-1031 erg s–1 are typical of the rare radio MSPs seen in X-rays.},
doi = {10.1088/2041-8205/727/1/L16},
journal = {The Astrophysical Journal. Letters},
number = 1,
volume = 727,
place = {United States},
year = {Thu Dec 23 00:00:00 EST 2010},
month = {Thu Dec 23 00:00:00 EST 2010}
}

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