The Discovery of Nulling and Mode Switching Pulsars with CHIME/Pulsar

C. Ng, B. Wu, M. Ma, S. M. Ransom, A. Naidu, E. Fonseca, P. J. Boyle, C. Brar, D. Cubranic, P. B. Demorest, D. C. Good, V. M. Kaspi, K. W. Masui, D. Michilli, C. Patel, A. Renard, P. Scholz, I. H. Stairs, S. P. Tendulkar, I. Tretyakov, K. Vanderlinde

Published 2020-09-15Version 1

The Pulsar backend of the Canadian Hydrogen Intensity Mapping Experiment (CHIME) has monitored hundreds of known pulsars in the northern sky since Fall 2018, providing a rich data set for the study of temporal variations in pulsar emission. Using a matched filtering technique, we report, for the first time, nulling behaviour in five pulsars as well as mode switching in nine pulsars. Only one of the pulsars is observed to show both nulling and moding signals. These new nulling and mode switching pulsars appear to come from a population with relatively long spin periods, in agreement with previous findings in the literature.