CHIME/FRB/Pulsar discovery of a nearby long period radio transient with a timing glitch

We present the discovery of a 421 s long period radio transient (LPT) using the CHIME telescope, CHIME J0630+25. The source is localized to RA=06:30:38.4$\pm 1^{\mathrm{\prime }}$ Dec=25:26:24$\pm 1^{\mathrm{\prime }}$ using voltage data acquired with the CHIME baseband system. A timing analysis shows that a model including a glitch is preferred over a non-glitch model with $dF\mathrm{/}F=1.3\times {10}^{-6}$, consistent with other glitching neutron stars. The timing model suggests a surface magnetic field of $\sim 1.5\times {10}^{15}$ G and a characteristic age of $\sim 1.28\times {10}^6$ yrs. A separate line of evidence to support a strong local magnetic field is an abnormally high rotation measure of $RM=-347.8(6)\mathrm{r}\mathrm{a}\mathrm{d}{\mathrm{m}}^{-2}$ relative to CHIME J0630+25’s modest dispersion measure of 22(1) pc cm${}^{-2}$, implying a dense local magneto-ionic structure. As a result, we believe that CHIME J0630+25 is a magnetized, slowly spinning, isolated neutron star. This marks CHIME J0630+25 as the longest period neutron star and the second long period neutron star with an inferred magnetar-like field. Based on dispersion measure models and comparison with pulsars with distance measurements, CHIME J0630+25 is located at a nearby distance of 170${}_{-100}^{+310}$ pc (95.4%), making it an ideal candidate for follow-up studies.