Detection of a new giant glitch in the Vela Pulsar observed from the Argentine Institute of Radio astronomy
ATel #16608; E. Zubieta (IAR, UNLP), S. B. Araujo Furlan (IATE, FAMAF), S. del Palacio (Chalmers University of Technology, IAR), F. Garcia (IAR, FCAGLP), G. Gancio (IAR), C. O. Lousto (RIT), J. A. Combi (IAR, FCAGLP), on behalf of the PuMA Collaboration.
on 2 May 2024; 19:58 UT
Credential Certification: Ezequiel Zubieta (ezubieta@iar.unlp.edu.ar)
At the Argentine Institute of Radio astronomy (IAR), we carry out a pulsar-timing program (Zubieta+2023) to observe pulsars from the Southern Hemisphere with up to daily cadence, as part of the PuMA collaboration. Observations are performed at a central frequency of 1400 MHz using the two 30 m antennas of the IAR as independent single dishes (Gancio+2020).
The Vela Pulsar (PSR B0833-45/PSR J0835-4510) is one of the most active pulsars in terms of glitching, counting 24 giant glitches in the last 50 years. The last giant glitch in Vela occurred on July 21, 2021 (MJD 59417), as we reported in ATel#
14806. Here we report on radio timing observations performed at IAR that reveal a new giant glitch.
We observed a glitch occurring between MJD 60428.96 (2024-04-28 23h UTC) and MJD 60431.84 (2024-05-01 20h UTC). The glitch was detected with both antennas. Our preliminary analysis yields a relative change in the pulsar rotation period of dF0/F0 = 2.3E-6, with respect to the timing solution fitted with observations before MJD 60428.96 (2024-04-28 23h UTC).
We will continue to conduct daily observations of the Vela Pulsar to characterize the post-glitch timing solution.
