Detection of a new glitch in PSR J1048-5832 observed from the Argentine Institute of Radio astronomy
ATel #16580; E. Zubieta (IAR, FCAGLP), 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 8 Apr 2024; 22:31 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 in which we observe pulsars from the Southern Hemisphere with up to daily cadence, as part of the PuMA collaboration [1]. Observations are performed at a central frequency of 1400 MHz using the two 30 m antennas of the IAR, with a bandwidth of 400 MHz and two polarizations in both antennas [2].
For the radio pulsar PSR J1048-5832, only five giant glitches have been reported so far [3]. Here we report the detection of a new glitch in PSR J1048-5832. We observed a glitch occurring between two consecutive 1.5-h observations started in MJD 60406.1 (2024-04-05 02:30 UTC) and MJD 60407.1 (2024-04-06 02:30 UTC), constraining the glitch time uncertainty to < 22.5 h (MJD 60406.6(5)). This was further confirmed with observations in MJD 60408.1 (2024-04-08 02:30 UTC). Our preliminary analysis yields a relative change in the pulsar rotation period of dF0/F0 = 4.1(1)E-6 with respect to the timing solution fitted with observations performed before MJD 60406.1 (2024-04-05 02:30 UTC). This is the largest glitch reported for this pulsar.
We will continue to daily monitor PSR J1048-5832 to characterize the glitch in more detail.
[1] https://puma.iar.unlp.edu.ar/
[2] https://www.aanda.org/articles/aa/abs/2020/01/aa36525-19/aa36525-19.html
[3] https://www.jb.man.ac.uk/pulsar/glitches/gTable.html
