Centre for Modeling & Simulation
Savitribai Phule Pune University

Technical Report CMS-TR-20131212

Title Probing nulling in milli-second pulsars
Author/s Kaustubh Rajwade
West Virginia University, Morgantown, WV 26506 USA

Mihir Arjunwadkar
Centre for Modeling and Simulation, Savitribai Phule Pune University, Pune 411 007, India

Yashwant Gupta
National Centre for Radio Astrophysics, Pune 411 007, India
Abstract Though the phenomenon of pulse nulling has been well studied for several bright normal-period pulsars, nulling studies for Milli-Second Pulsars (MSPs) have not been done extensively as they require high sensitivity and high time and frequency resolutions. Such studies can be useful to probe the relevance of pulse nulling in the regime of lower magnetic fields and faster spin rates that apply for MSPs. We present new results from nulling studies of a set of 5 MSPs using the Giant Metrewave Radio Telescope (GMRT). We show that the MSP PSR J0437-4715 does not null at all (to a level deeper than earlier results). For the other weaker MSPs, we employ a novel technique to obtain robust estimates of null fraction. Our results tend toward the conclusion that the MSPs studied so far do not exhibit nulling.
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Citing This Document Kaustubh Rajwade, Mihir Arjunwadkar, and Yashwant Gupta , Probing nulling in milli-second pulsars . Technical Report CMS-TR-20131212 of the Centre for Modeling and Simulation, Savitribai Phule Pune University, Pune 411007, India (2013); available at http://cms.unipune.ac.in/reports/.
Notes, Published Reference, Etc. Work presented at the conference The Metre Wavelength Sky: Celebrating 50 years of Radio Astronomy at TIFR & 10 years of GMRT, 9-13 December 2013. Published as Astronomical Society of India Conference Series 13, 73-77 (2014)
Contact kmrajwade AT mix.wvu.edu, mihir AT cms.unipune.ac.in, ygupta AT ncra.tifr.res.in
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