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Radio Detection of the Fermi-LAT Blind Search Millisecond Pulsar J1311-3430We report the detection of radio emission from PSR J1311.3430, the first millisecond pulsar (MSP) discovered in a blind search of Fermi Large Area Telescope (LAT) gamma-ray data. We detected radio pulsations at 2 GHz, visible for less than 10% of approximately 4.5 hr of observations using the Green Bank Telescope (GBT). Observations at 5 GHz with the GBT and at several lower frequencies with Parkes, Nan cay, and the Giant Metrewave Radio Telescope resulted in non-detections. We also report the faint detection of a steep spectrum continuum radio source (0.1 mJy at 5 GHz) in interferometric imaging observations with the Jansky Very Large Array. These detections demonstrate that PSR J1311.3430 is not radio quiet and provide additional evidence that radio-quiet MSPs are rare. The radio dispersion measure of 37.8 pc cm(exp -3) provides a distance estimate of 1.4 kpc for the system, yielding a gamma-ray efficiency of 30%, typical of LAT-detected MSPs. We see apparent excess delay in the radio pulses as the pulsar appears from eclipse and we speculate on possible mechanisms for the non-detections of the pulse at other orbital phases and observing frequencies.
Document ID
20130013677
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
doi:10.1088/2041-8205/763/1/L13
Authors
Ray, P. S. (Naval Research Lab. Washington, DC, United States)
Ransom, S. M. (National Radio Astronomy Observatory Charlottesville, VA, United States)
Cheung, C. C. (National Academy of Sciences - National Research Council Washington, DC, United States)
Giroletti, M. (Istituto di Radioastronomia Bologna, Italy)
Cognard, I. (Observatoire de Paris France)
Camilo, F. (Columbia Univ. New York, NY, United States)
Bhattacharyya, B. (Inter-University Centre for Astronomy and Astrophysics Pune, India)
Roy, J. (Tata Inst. of Fundamental Research Pune, India)
Romani, R. W. (Stanford Univ. Stanford, CA, United States)
Ferrara, E. C. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Guillemot, L. (Max-Planck-Inst. fuer Radioastronomie Bonn, Germany)
Johnston, S. (Australia Telescope National Facility Epping, Australia)
Keith, M. (Australia Telescope National Facility Epping, Australia)
Kerr, M. (Stanford Univ. Stanford, CA, United States)
Kramer, M. (Max-Planck-Inst. fuer Radioastronomie Bonn, Germany)
Pletsch, H. J. (Max-Planck-Inst. fuer Gravitationsphysik, Albert-Einstein-Institut Golm, Germany)
Parkinson, P. M. Saz (California Univ. Santa Cruz, CA, United States)
Date Acquired
August 27, 2013
Publication Date
January 20, 2013
Publication Information
Publication: The Astrophysical Journal Letters
Volume: 763
Issue: 1
Subject Category
Astrophysics
Report/Patent Number
GSFC-E-DAA-TN8391
Funding Number(s)
CONTRACT_GRANT: NNG06EO90A
CONTRACT_GRANT: ASI-INAF I/009/10/0
CONTRACT_GRANT: NASA DPR S-15633-Y
Distribution Limits
Public
Copyright
Public Use Permitted.

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