Discovery and Follow-up of Rotating Radio Transients with the Green Bank and LOFAR Telescopes
| Autor: | Anne M. Archibald, Jason W. T. Hessels, Lina Levin, Fredrick A. Jenet, Jason Boyles, Maura McLaughlin, J. van Leeuwen, Scott M. Ransom, X. Siemens, Mallory S. E. Roberts, Ryan S. Lynch, Ingrid H. Stairs, Joseph K. Swiggum, David L. Kaplan, C. Karako-Argaman, E. C. Madsen, V. M. Kaspi, V. I. Kondratiev, Kevin Stovall, Duncan R. Lorimer |
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| Přispěvatelé: | High Energy Astrophys. & Astropart. Phys (API, FNWI) |
| Rok vydání: | 2015 |
| Předmět: |
Physics
High Energy Astrophysical Phenomena (astro-ph.HE) 010308 nuclear & particles physics Astrophysics::High Energy Astrophysical Phenomena Green Bank Telescope Astrophysics::Instrumentation and Methods for Astrophysics FOS: Physical sciences Astronomy and Astrophysics Astrophysics LOFAR Astrophysics::Cosmology and Extragalactic Astrophysics Low frequency 01 natural sciences Activity spectrum Pulsar Space and Planetary Science 0103 physical sciences Dispersion (optics) Radio frequency Astrophysics - High Energy Astrophysical Phenomena 010303 astronomy & astrophysics Fourier domain |
| Zdroj: | Astrophysical Journal, 809(1):67. IOP Publishing Ltd. |
| ISSN: | 0004-637X |
| DOI: | 10.48550/arxiv.1503.05170 |
| Popis: | We have discovered 21 Rotating Radio Transients (RRATs) in data from the Green Bank Telescope (GBT) 350-MHz Drift-scan and the Green Bank North Celestial Cap pulsar surveys using a new candidate sifting algorithm. RRATs are pulsars with sporadic emission that are detected through their bright single pulses rather than Fourier domain searches. We have developed {\tt RRATtrap}, a single-pulse sifting algorithm that can be integrated into pulsar survey data analysis pipelines in order to find RRATs and Fast Radio Bursts. We have conducted follow-up observations of our newly discovered sources at several radio frequencies using the GBT and Low Frequency Array (LOFAR), yielding improved positions and measurements of their periods, dispersion measures, and burst rates, as well as phase-coherent timing solutions for four of them. The new RRATs have dispersion measures (DMs) ranging from 15 to 97 pc cm$^{-3}$, periods of 240 ms to 3.4 s, and estimated burst rates of 20 to 400 pulses hr$^{-1}$ at 350 MHz. We use this new sample of RRATs to perform statistical comparisons between RRATs and canonical pulsars in order to shed light on the relationship between the two populations. We find that the DM and spatial distributions of the RRATs agree with those of the pulsars found in the same survey. We find evidence that slower pulsars (i.e. $P>200$ ms) are preferentially more likely to emit bright single pulses than are faster pulsars ($P 18 pages, 13 figures, 5 tables, published in ApJ |
| Databáze: | OpenAIRE |
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