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We report on the the long term monitoring campaign of the seemingly youngest magnetar Swift~J1818.0-1607 at radio and X-ray wavelengths over a span of one year. We obtained a coherent timing solution for the magnetar over the same time…

High Energy Astrophysical Phenomena · Physics 2022-03-02 K. M. Rajwade , B. W. Stappers , A. G. Lyne , B. Shaw , M. B. Mickaliger , K. Liu , M. Kramer , G. Desvignes , R. Karuppusamy , T. Enoto , T. Güver , Chin-Ping Hu , M. P. Surnis

After spending almost a decade in a radio-quiet state, the Anomalous X-ray Pulsar XTE J1810-197 turned back on in early December 2018. We have observed this radio magnetar at 1.5 GHz with ~daily cadence since the first detection of radio…

High Energy Astrophysical Phenomena · Physics 2019-08-07 L. Levin , A. G. Lyne , G. Desvignes , R. P. Eatough , R. Karuppusamy , M. Kramer , M. Mickaliger , B. W. Stappers , P. Weltevrede

We report the serendipitous discovery of an extremely intermittent radio pulsar, PSR J1710-3452, with a relatively long spin period of 10.4 s. The object was discovered through the detection of 97 bright radio pulses in only one out of 66…

We report the discovery with the Parkes radio telescope of a pulsar associated with the ~ 1700 yr-old oxygen-rich composite supernova remnant G292.0+1.8. PSR J1124-5916 has period 135 ms and period derivative 7.4e-13, implying…

Astrophysics · Physics 2009-11-07 F. Camilo , R. N. Manchester , B. M. Gaensler , D. R. Lorimer , J. Sarkissian

Polarised radio emission from PSR J1745-2900 has already been used to investigate the strength of the magnetic field in the Galactic Centre, close to Sagittarius A*. Here we report how persistent radio emission from this magnetar, for over…

In a search of the unidentified Fermi gamma-ray source 3FGL J1417.5-4402 with the Parkes radio telescope, we discovered PSR J1417-4402, a 2.66 ms pulsar having the same 5.4 day orbital period as the optical and X-ray binary identified by…

Solar and Stellar Astrophysics · Physics 2016-03-23 F. Camilo , J. E. Reynolds , S. M. Ransom , J. P. Halpern , S. Bogdanov , M. Kerr , P. S. Ray , J. M. Cordes , J. Sarkissian , E. D. Barr , E. C. Ferrara

We report on single-pulse observations of the Galactic Center magnetar PSR J1745$-$2900 that were made using the Parkes 64-m radio telescope with a central frequency of 3.1 GHz at five observing epochs between 2013 July and August. The…

High Energy Astrophysical Phenomena · Physics 2018-02-23 W. M. Yan , N. Wang , R. N. Manchester , Z. G. Wen , J. P. Yuan

We present results from eight months of Green Bank Telescope 8.7-GHz observations and nearly 18 months Swift X-ray telescope observations of the radio magnetar SGR J1745-2900, which is located 2.4" from Sgr A*. We tracked the magnetar's…

High Energy Astrophysical Phenomena · Physics 2014-12-02 Ryan S. Lynch , Robert F. Archibald , Victoria M. Kaspi , Paul Scholz

We present the long-term spectro-temporal evolution of the average radio emission properties of the magnetar XTE J1810-197 (PSR J1809-1943) following its most recent outburst in late 2018. We report the results from two and a half years of…

High Energy Astrophysical Phenomena · Physics 2022-06-01 Yogesh Maan , Mayuresh P. Surnis , Bhal Chandra Joshi , Manjari Bagchi

The radio pulsar PSR J0742-2822 is known to exhibit rapid changes between different pulse profile states that correlate with changes in its spin-down rate. However, the connection between these variations and the glitch activity of the…

High Energy Astrophysical Phenomena · Physics 2025-02-12 E. Zubieta , F. García , S. del Palacio , C. M. Espinoza , S. B. Araujo Furlan , G. Gancio , C. O. Lousto , J. A. Combi , E. Gügercinoğlu

The recent discovery of a radio-emitting neutron star with an ultralong spin period of 76 s, PSR J0901-4046, raises a fundamental question on how such a slowly rotating magnetized object can be active in the radio band. A canonical magnetic…

High Energy Astrophysical Phenomena · Physics 2023-04-10 D. N. Sob'yanin

PSR J0901$-$4046, a likely radio-loud neutron star with a period of 75.88 seconds, challenges conventional models of neutron star radio emission. Here, we showcase results from 46 hours of follow-up observations of PSR J0901$-$4046 using…

We present a total of 48 minutes of observations of the nearby, bright millisecond pulsar PSR J0437-4715 taken at the Parkes radio observatory in Australia. The data were obtained at a central radio frequency of 1380 MHz using a high-speed…

Astrophysics · Physics 2009-10-30 F. A. Jenet , S. B. Anderson , V. M. Kaspi , T. A. Prince , S. C. Unwin

By analysing the data acquired from the Parkes 64-m radio telescope at 1369 MHz, we report on the phase-stationary non-drift amplitude modulation observed in PSR J1048-5832. The high-sensitivity observations revealed that the central and…

High Energy Astrophysical Phenomena · Physics 2020-01-08 W. M. Yan , R. N. Manchester , N. Wang , Z. G. Wen , J. P. Yuan , K. J. Lee , J. L. Chen

The variable X-ray source 1E 1547.0-5408 was identified by Gelfand & Gaensler (2007) as a likely magnetar in G327.24-0.13, an apparent supernova remnant. No X-ray pulsations have been detected from it. Using the Parkes radio telescope, we…

Astrophysics · Physics 2009-11-13 F. Camilo , S. M. Ransom , J. P. Halpern , J. Reynolds

We report on two years of flux and spin evolution monitoring of 1E 1048.1$-$5937, a 6.5-s X-ray pulsar identified as a magnetar. Using {\it Swift} XRT data, we observed an X-ray outburst consisting of an increase in the persistent 1--10 keV…

High Energy Astrophysical Phenomena · Physics 2015-06-23 R. F. Archibald , V. M. Kaspi , C. -Y. Ng , P. Scholz , A. P. Beardmore , N. Gehrels , J. A. Kennea

We present an analysis of regular timing observations of the high-magnetic-field Rotating Radio Transient (RRAT) J1819$-$1458 obtained using the 64-m Parkes and 76-m Lovell radio telescopes over the past five years. During this time, the…

Solar and Stellar Astrophysics · Physics 2015-05-14 A. G. Lyne , M. A. McLaughlin , E. F. Keane , M. Kramer , C. M. Espinoza , B. W. Stappers , N. T. Palliyaguru , J. Miller , .

We apply theoretical spin-down models of magnetospheric evolution and magnetic field decay to simulate the possible evolution of PSR J0250+5854, which is the slowest-spinning radio pulsar detected to date. Considering the alignment of…

High Energy Astrophysical Phenomena · Physics 2019-05-29 F. F. Kou , H. Tong , R. X. Xu , X. Zhou

The origin of the high-frequency radio emission detected from several magnetars is poorly understood. In this paper, we report the ~40 GHz properties of SGR J1745-29 as measured using Jansky Very Large Array (JVLA) and Robert C. Byrd Green…

Magnetars are a special subset of the isolated neutron star family, with X-ray and radio emission mainly powered by the decay of their immense magnetic fields. Many attributes of magnetars remain poorly understood: spin-down glitches or the…