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Radio Physics and Radio Astronomy

ISSN Print: 2152-274X
ISSN Online: 2152-2758

Archives: Volume 1, 2010 to Volume 3, 2012

Radio Physics and Radio Astronomy

DOI: 10.1615/RadioPhysicsRadioAstronomy.v2.i1.20
pages 15-21

SEARCH FOR PULSED RADIO EMISSION FROM X-RAY DIM ISOLATED NEUTRON STARS AT DECAMETER WAVELENGTHS

V. V. Zakharenko
Institute of Radio Astronomy, National Academy of Sciences of Ukraine
A. V. Markova
Institute of Radio Astronomy, National Academy of Sciences of Ukraine
Y. Y. Vasylyeva
Institute of Radio Astronomy, National Academy of Sciences of Ukraine

ABSTRACT

This paper mainly deals with the search for radio emission of x-ray dim isolated neutron stars (XDINS) at decameter wavelengths seeing that some discrepant data about presence or absence of pulsed emission from them have appeared. The reason for the search experiments became equipping of the UTR-2 radio telescope with a new broadband highly sensitive receiver possessing a large dynamic range, and also development of the software package for searching the pulse and recurrent emission. The results obtained give no ground to suggest the presence of pulsed radio emission from sources 1RXS J1308+21 and 1RXS J2143+06 at the level above 4σ with σ = 2.5 mJy. This can be explained by both the absence of radio emission and the inverse spectrum slope at low frequencies or change of signal character. The high sensitivity of the experiment and of the developed package of search programs has been proved by reliable detection, with > 10σ, of the "test" weak pulsar B1508+55 which has never been detected at decameter waves.