LOFAR Discovery of a 23.5 s Radio Pulsar

  title={LOFAR Discovery of a 23.5 s Radio Pulsar},
  author={C. M. Tan and C. G. Bassa and S. Cooper and Tammo Jan Dijkema and Paolo Esposito and Jason W. T. Hessels and Vladislav I. Kondratiev and Michael Kramer and Daniele Michilli and Sotiris Sanidas and Timothy W. Shimwell and Ben W. Stappers and Joeri van Leeuwen and Ismael Cognard and Jean-Mathias Grie{\ss}meier and Aris Karastergiou and Evan F. Keane and Charlotte Sobey and Patrick Weltevrede},
  journal={The Astrophysical Journal},
We present the discovery of PSR J0250+5854, a radio pulsar with a spin period of 23.5 s. This is the slowest-spinning radio pulsar known. PSR J0250+5854 was discovered by the LOFAR Tied-Array All-Sky Survey (LOTAAS), an all-Northern-sky survey for pulsars and fast transients at a central observing frequency of 135 MHz. We subsequently detected pulsations from the pulsar in the interferometric images of the LOFAR Two-metre Sky Survey, allowing for sub-arcsecond localization. This, along with a… Expand

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