The Northern Cross Fast Radio Burst project. I. Overview and pilot observations at 408 MHz

Abstract

Fast radio bursts remain one of the most enigmatic astrophysical sources. Observations have significantly progressed over the last few years, thanks to the capabilities of new radio telescopes and the refurbishment of existing ones. Here we describe the upgrade of the Northern Cross radio telescope, operating in the 400-416~MHz frequency band, with the ultimate goal of turning the array into a dedicated instrument to survey the sky for fast radio bursts. We present test observations of the pulsar B0329+54 to characterize the system performance and forecast detectability. Observations with the system currently in place are still limited by modest sky coverage ($\sim 9.4$~deg${}^2$) and biased by smearing of high dispersion measure events within each frequency channels. In its final, upgraded configuration, however, the telescope will be able to carry out unbiased fast radio burst surveys over a $\sim 350$~deg${}^2$ instantaneous field of view up to $z\sim 5$, with a (nearly constant) $\sim 760(\tau /\mathrm{ms}{)}^{-0.5}$~mJy rms sensitivity.

arXiv comment8 pages, 9 figures, accepted by MNRAS

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