%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