RADIO DETECTION OF THE FERMI-LAT BLIND SEARCH MILLISECOND PULSAR J1311-3430
- Space Science Division, Naval Research Laboratory, Washington, DC 20375-5352 (United States)
- National Radio Astronomy Observatory (NRAO), Charlottesville, VA 22903 (United States)
- National Academy of Sciences, Washington, DC 20001 (United States)
- INAF Istituto di Radioastronomia, I-40129 Bologna (Italy)
- Laboratoire de Physique et Chimie de l'Environnement, LPCE UMR 6115 CNRS, F-45071 Orleans Cedex 02 (France)
- Columbia Astrophysics Laboratory, Columbia University, New York, NY 10027 (United States)
- Inter-University Centre for Astronomy and Astrophysics, Pune 411 007 (India)
- National Centre for Radio Astrophysics, Tata Institute of Fundamental Research, Pune 411 007 (India)
- W. W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94305 (United States)
- NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States)
- Max-Planck-Institut fuer Radioastronomie, Auf dem Huegel 69, D-53121 Bonn (Germany)
- CSIRO Astronomy and Space Science, Australia Telescope National Facility, Epping NSW 1710 (Australia)
- Max-Planck-Institut fuer Gravitationsphysik, Albert-Einstein-Institut, D-30167 Hannover (Germany)
We 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 <10% of {approx}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, Nancay, 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{sup -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.
- OSTI ID:
- 22078321
- Journal Information:
- Astrophysical Journal Letters, Vol. 763, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 2041-8205
- Country of Publication:
- United States
- Language:
- English
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