%0 Conference Proceedings
%T Low frequency pulsar observations with the international LOFAR station FR606
%+ Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E)
%+ Unité Scientifique de la Station de Nançay (USN)
%A Bondonneau, Louis
%A Griessmeier, Jean-Mathias
%A Theureau, Gilles
%A Serylak, Maciej
%< avec comité de lecture
%B Pulsar Astrophysics the Next Fifty Years
%C à renseigner, Unknown Region
%V 337
%P 313-314
%8 2018
%D 2018
%Z 2018IAUS..337..313B
%R 10.1017/S1743921317009656
%Z Sciences of the Universe [physics]Conference papers
%X The pulsar's signal passes through the interstellar medium (ISM) which leads to both chromatic dispersive delays and multipath pulse broadening. These effects have a strong frequency dependence (f-2 and f-4 respectively). Pulse profiles of pulsars are also frequency-dependent leading to some degeneracy with the ISM imprint. Furthermore, many pulsars show a turnover of their spectrum around ~100 MHz. For all these reasons, the frequency band below 100 MHz contains a lot of information about both the pulsar emission and the ISM. Our study is based on a LOw Frequency ARray (LOFAR) monitoring campaign using the international station FR606. Firstly, we demonstrate the importance of a monitoring campaign. Secondly, we calculate median spectra and locate the turnover frequency for 3 pulsars (B0809+74, B1133+16, B1508+55).
%G English
%L insu-03566308
%U https://insu.hal.science/insu-03566308
%~ OBSPM
%~ INSU
%~ CNRS
%~ UNIV-ORLEANS
%~ CNES
%~ USN
%~ OSUC
%~ LPC2E
%~ PSL
%~ OBSPM-PSL