A LOFAR census of non-recycled pulsars: extending below 80 MHz

Authors :: Bilous, A. V.
Bondonneau, L.
Kondratiev, V. I.
Griessmeier, J. -M.
Theureau, G.
Hessels, J. W. T.
Kramer, M.
van Leeuwen, J.
Sobey, C.
Stappers, B. W.
ter Veen, S.
Weltevrede, P.
Source :: A&A 635, A75 (2020)
Publication Year :: 2019
Abstract: We present the results from the low-frequency (40--78 MHz) extension of the first LOFAR pulsar census of non-recycled pulsars. We have used the Low-Band Antennas of the LOFAR core stations to observe 87 pulsars out of 158 that have been detected previously with the High-Band Antennas. Forty-three pulsars have been detected and we present here their flux densities and flux-calibrated profiles. Seventeen of these pulsars have not been, to our knowledge, detected before at such low frequencies. We re-calculate the spectral indices using the new low-frequency flux density measurements from the LOFAR census and discuss the prospects of studying pulsars at the very low frequencies with the current and upcoming facilities, such as NenuFAR.<br />Comment: submitted to A&A