PROSPECTS FOR DETECTING FAST TRANSIENTS WITH THE RADIO TELESCOPES OF THE ARGENTINE INSTITUTE OF RADIO ASTRONOMY
Paper in proceeding, 2024

Currently, 6 out of 30 known magnetars had pulsed radio emission detected. In this work, we evaluated the possibility of detecting radio transient events from magnetars with the telescopes of the Instituto Argentino de Radioastronomía (IAR). To this aim, we made daily observations of the magnetar XTE J1810−197 from 02-Sep-22 to 30-Nov-22. We analysed the observations by applying ephemeris folding and single pulse searches. We fitted a timing model to our observations and were able to detect the magnetar on 6 of the 36 observing sessions with signal-to-noise ratios at the limit of detectability, 3.3 ≤ S/N ≤ 4.1. We searched for individual pulses in one of these 6 days and found 7 individual pulses with 8.5 ≤ S/N ≤ 18.8. The dispersion measure changed slightly between pulses within a range of 178 ≤ DM [pc cm−3] ≤ 182. The pulse with S/N = 18.8 has an associated DM of 180 pc cm−3. We confirmed that we can detect pulsed radio emission in the band of 1400 − 1456 MHz from magnetars with a time resolution of 146 µs, being able to detect both integrated pulse profiles and individual pulses.

Stars: neutron

Stars: magnetars

Methods: observational

Radio continuum: general

Methods: data analysis

Author

S. B. Araujo Furlan

Astronomía y Física

Instituto de Astronomía Teórica y Experimental (IATE)

E. Zubieta

National University of La Plata

Instituto Argentino de Radioastronomia

G. Gancio

Instituto Argentino de Radioastronomia

G. E. Romero

Instituto Argentino de Radioastronomia

Santiago Del Palacio

Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics

Instituto Argentino de Radioastronomia

Federico García

Instituto Argentino de Radioastronomia

Carlos O. Lousto

Rochester Institute of Technology

J. A. Combi

Universidad de Jaén

National University of La Plata

Instituto Argentino de Radioastronomia

Revista Mexicana de Astronomia y Astrofisica: Serie de Conferencias

14052059 (ISSN)

Vol. 56 85-89

2022 Instituto Argentino de Radioastronomia (IAR) 60th Anniversary: Prospects for Low-Frequency Radio Astronomy in South America
Buenos Aires, Argentina,

Subject Categories

Astronomy, Astrophysics and Cosmology

Atom and Molecular Physics and Optics

Fusion, Plasma and Space Physics

DOI

10.22201/ia.14052059p.2024.56.14

More information

Latest update

5/29/2024