Pulsar searches of Fermi unassociated sources with the Effelsberg telescope
Abstract
Using the 100-m Effelsberg radio telescope operating at 1.36 GHz, we have performed a targeted radio pulsar survey of 289 unassociated γ-ray sources discovered by the Large Area Telescope (LAT) aboard the Fermi satellite and published in the 1FGL catalogue (Abdo et al. 2010a). In addition, this survey resulted in the discovery of millisecond pulsar J1745+1017, which resides in a short-period binary system with a low-mass companion, Mc,min~0.0137M⊙, indicative of ‘black widow’ type systems. A 2-yr timing campaign has produced a refined radio ephemeris, accurate enough to allow for phase-folding of the LAT photons, resulting in the detection of a dual-peaked γ-ray light curve, proving that PSR J1745+1017 is the source responsible for the γ-ray emission seen in 1FGL J1745.5+1018 (2FGL J1745.6+1015; Nolan et al. 2012). We find the γ-ray spectrum of PSR J1745+1017 to be well modelled by an exponentially cut-off power law with cut-off energy 3.2 GeV and photon index 1.6. The observed sources are known to contain a further 10 newly discovered pulsars which were undetected in this survey. Our radio observations of these sources are discussed and in all cases limiting flux densities are calculated. Lastly, the reasons behind the seemingly low yield of discoveries aremore »
- Authors:
- more »
- Publication Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE
- Contributing Org.:
- Fermi-LAT Collaboration
- OSTI Identifier:
- 1356600
- Grant/Contract Number:
- AC02-76SF00515
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Monthly Notices of the Royal Astronomical Society
- Additional Journal Information:
- Journal Volume: 429; Journal Issue: 2; Journal ID: ISSN 0035-8711
- Publisher:
- Royal Astronomical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; pulsars: general; pulsars: individual: PSR J1745+1017; gamma-rays: general
Citation Formats
Barr, E. D., Guillemot, L., Champion, D. J., Kramer, M., Eatough, R. P., Lee, K. J., Verbiest, J. P. W., Bassa, C. G., Camilo, F., Celik, O., Cognard, I., Ferrara, E. C., Freire, P. C. C., Janssen, G. H., Johnston, S., Keith, M., Lyne, A. G., Michelson, P. F., Parkinson, P. M. S., Ransom, S. M., Ray, P. S., Stappers, B. W., and Wood, K. S. Pulsar searches of Fermi unassociated sources with the Effelsberg telescope. United States: N. p., 2012.
Web. doi:10.1093/mnras/sts449.
Barr, E. D., Guillemot, L., Champion, D. J., Kramer, M., Eatough, R. P., Lee, K. J., Verbiest, J. P. W., Bassa, C. G., Camilo, F., Celik, O., Cognard, I., Ferrara, E. C., Freire, P. C. C., Janssen, G. H., Johnston, S., Keith, M., Lyne, A. G., Michelson, P. F., Parkinson, P. M. S., Ransom, S. M., Ray, P. S., Stappers, B. W., & Wood, K. S. Pulsar searches of Fermi unassociated sources with the Effelsberg telescope. United States. https://doi.org/10.1093/mnras/sts449
Barr, E. D., Guillemot, L., Champion, D. J., Kramer, M., Eatough, R. P., Lee, K. J., Verbiest, J. P. W., Bassa, C. G., Camilo, F., Celik, O., Cognard, I., Ferrara, E. C., Freire, P. C. C., Janssen, G. H., Johnston, S., Keith, M., Lyne, A. G., Michelson, P. F., Parkinson, P. M. S., Ransom, S. M., Ray, P. S., Stappers, B. W., and Wood, K. S. Fri .
"Pulsar searches of Fermi unassociated sources with the Effelsberg telescope". United States. https://doi.org/10.1093/mnras/sts449. https://www.osti.gov/servlets/purl/1356600.
@article{osti_1356600,
title = {Pulsar searches of Fermi unassociated sources with the Effelsberg telescope},
author = {Barr, E. D. and Guillemot, L. and Champion, D. J. and Kramer, M. and Eatough, R. P. and Lee, K. J. and Verbiest, J. P. W. and Bassa, C. G. and Camilo, F. and Celik, O. and Cognard, I. and Ferrara, E. C. and Freire, P. C. C. and Janssen, G. H. and Johnston, S. and Keith, M. and Lyne, A. G. and Michelson, P. F. and Parkinson, P. M. S. and Ransom, S. M. and Ray, P. S. and Stappers, B. W. and Wood, K. S.},
abstractNote = {Using the 100-m Effelsberg radio telescope operating at 1.36 GHz, we have performed a targeted radio pulsar survey of 289 unassociated γ-ray sources discovered by the Large Area Telescope (LAT) aboard the Fermi satellite and published in the 1FGL catalogue (Abdo et al. 2010a). In addition, this survey resulted in the discovery of millisecond pulsar J1745+1017, which resides in a short-period binary system with a low-mass companion, Mc,min~0.0137M⊙, indicative of ‘black widow’ type systems. A 2-yr timing campaign has produced a refined radio ephemeris, accurate enough to allow for phase-folding of the LAT photons, resulting in the detection of a dual-peaked γ-ray light curve, proving that PSR J1745+1017 is the source responsible for the γ-ray emission seen in 1FGL J1745.5+1018 (2FGL J1745.6+1015; Nolan et al. 2012). We find the γ-ray spectrum of PSR J1745+1017 to be well modelled by an exponentially cut-off power law with cut-off energy 3.2 GeV and photon index 1.6. The observed sources are known to contain a further 10 newly discovered pulsars which were undetected in this survey. Our radio observations of these sources are discussed and in all cases limiting flux densities are calculated. Lastly, the reasons behind the seemingly low yield of discoveries are also discussed.},
doi = {10.1093/mnras/sts449},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 2,
volume = 429,
place = {United States},
year = {Fri Dec 21 00:00:00 EST 2012},
month = {Fri Dec 21 00:00:00 EST 2012}
}
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