PSR J0437-4715: The Argentine Institute of Radioastronomy 2019-2020 Observational Campaign

SOSA FISCELLA, V.; LOUSTO, C.O.; GARCÍA, F.; KORNECKI, P.; MÜLLER, A.L.; PALACIO, S. DEL; COMBI, J.A.; GUTIÉRREZ, E.; ARMENGOL, F.G.L.; BUNZEL, A. SIMAZ; COMBI, L.; GANCIO, G.; HAUSCARRIAGA, F.; MANCUSO, G.C.

ASTROPHYSICAL JOURNAL

IOP PUBLISHING LTD

Lugar: Londres; Año: 2021 vol. 908 p. 158 - 172

0004-637X

We present the first-year data set of high-cadence, long-duration observations of the bright millisecond pulsar J0437-4715 obtained in the Argentine Institute of Radioastronomy (IAR). Using two single-dish 30 m radio antennas, we gather more than 700 hr of good-quality data with timing precision better than 1 μs. We characterize the white and red timing noise in IAR´s observations, we quantify the effects of scintillation, and we perform single-pulsar searches of continuous gravitational waves, setting constraints in the nHz-μHz frequency range. We demonstrate IAR´s potential for performing pulsar monitoring in the 1.4 GHz radio band for long periods of time with a daily cadence. In particular, we conclude that the ongoing observational campaign of the millisecond pulsar J0437-4715 can contribute to increase the sensitivity of the existing pulsar-timing arrays.