Ezequiel Zubieta

Single-pulse reanalysis of the 2024 Vela glitch and new observations of PSR~J0437$-$4715 and PSR~J1644$-$4559

Carlos O. Lousto, Ruby Shrestha, Ezequiel Zubieta, Susana B. Araujo Furlan et autres

The Pulsar Monitoring in Argentina (PuMA) collaboration systematically monitors southern glitching pulsars, maintaining high-cadence single-pulse records of the Vela pulsar. We present a pulse-per-pulse reanalysis of the 2024 major glitch of Vela (PSR~J0835$-$4510) with the 400~MHz-bandwidth ROACH backend of the Argentine Institute …

First fast radio burst search campaign at the Argentine Institute of Radio Astronomy

Carlos O. Lousto, Harsh Prajapati, Ezequiel Zubieta, Susana B. Araujo Furlan et autres

Fast radio bursts (FRBs) are intense millisecond-duration radio transients of extragalactic origin whose physical nature remains under active investigation, and which also serve as probes of the intergalactic medium. We report on the first FRB search campaign carried out at the Argentine …

First fast radio burst search campaign at the Argentine Institute of Radio Astronomy

Carlos O. Lousto, Harsh Prajapati, Ezequiel Zubieta, Susana B. Araujo Furlan et autres

Fast radio bursts (FRBs) are intense millisecond-duration radio transients of extragalactic origin whose physical nature remains under active investigation, and which also serve as probes of the intergalactic medium. We report on the first FRB search campaign carried out at the Argentine …

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Monitoreo intensivo de púlsares del hemisferio sur

Ezequiel Zubieta

Los púlsares son objetos compactos que nacen como resultado del colapso del núcleo de estrellas masivas tras llegar al final de su vida y explotar como supernova. Tanto la naturaleza de la materia en su interior como los mecanismos de emisión de …

First results of the glitching pulsars monitoring program at the Argentine Institute of Radioastronomy

Ezequiel Zubieta

Although pulsars exhibit a particularly stable rotation, this stability can be affected by glitches. This phenomenon consists of a sudden increase in the rotation frequency of pulsars. Its cause is not well understood, but it is likely related to the behavior of …

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Constraints on Gravitational Waves from the 2024 Vela Pulsar Glitch

Santiago del Palacio, Guillermo Matías Gancio, Federico García, Gustavo Esteban Romero et autres

Among known neutron stars, the Vela pulsar is one of the best targets for gravitational-wave searches. It is also one of the most prolific in terms of glitches, which are sudden frequency changes in a pulsar’s rotation. Such glitches could cause a …

Giant radio pulses in the magnetar XTE J1810−197 detected with the IAR’s telescopes

Susana Beatriz Araujo Furlan, Gustavo Esteban Romero, Ezequiel Zubieta, Guillermo Matías Gancio et autres

Context. XTE J1810−197 is one of the six magnetars that exhibit radio emission, sometimes visible only during periods of increased activity or outbursts. XTE J1810−197 underwent its latest outburst in December 2018. Aims. We analyzed the population of single pulses of XTE …

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Constraints on gravitational waves from the 2024 Vela pulsar glitch

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration, A. G. Abac et autres

Among known neutron stars, the Vela pulsar is one of the best targets for gravitational-wave searches. It is also one of the most prolific in terms of glitches, sudden frequency changes in a pulsar's rotation. Such glitches could cause a variety of …

PSR J0537–6910: Exponential recoveries detected for 12 glitches

Ezequiel Zubieta, C. M. Espinoza, Danai Antonopoulou, Wynn C. G. Ho et autres

Context. Pulsar rotational glitches are unresolved increments of the rotation rate that sometimes trigger an enhancement of the spin-down rate. On occasion, the augmented spin-down decays gradually over days or months in an exponential manner. This is observed particularly after the largest …

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PSR J0537-6910: Exponential recoveries detected for 12 glitches

Ezequiel Zubieta, C. M. Espinoza, Danai Antonopoulou, Wynn C. G. Ho et autres

Pulsar glitches are unresolved increments of the rotation rate that sometimes trigger an enhancement of the spin-down rate. On occasions, the augmented spin-down decays gradually in an exponential manner, particularly after the largest glitch events. The young pulsar PSR J0537-6910 exhibits the …

Study of the 2024 major Vela glitch at the Argentine Institute of Radioastronomy

Ezequiel Zubieta, Ryan Missel, S. B. Araujo Furlan, Carlos O. Lousto et autres

Context. We report here on new results of the systematic monitoring of southern glitching pulsars at the Argentine Institute of Radioastronomy. In particular, we study in this work the new major glitch in the Vela pulsar (PSR J0835−4510) that occurred on 2024 …

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Search for Continuous Gravitational Waves from Known Pulsars in the First Part of the Fourth LIGO-Virgo-KAGRA Observing Run

Adrian Abac, Robert Abbott, I. Abouelfettouh, F Acernese et autres

Abstract Continuous gravitational waves (CWs) emission from neutron stars carries information about their internal structure and equation of state, and it can provide tests of general relativity. We present a search for CWs from a set of 45 known pulsars in the …

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