Remarkable Radio Pulses from the Magnetar XTE J1810-197

Details Remarkable Radio Pulses from the Magnetar XTE J1810-197 Remarkable Radio Pulses from the Magnetar XTE J1810-197

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006head....9.0603h&link_type=abstract

American Astronomical Society, HEAD meeting #9, #6.03; Bulletin of the American Astronomical Society, Vol. 38, p.349

Astronomy and Astrophysics

Astronomy

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Scientific paper

The magnetar XTE J1810-197 was serendipitously detected as a 4.5 mJy radio source in the MAGPIS radio survey of the Galactic Plane in January of 2004, one year after it flared into view in X-rays. By the time we re-observed the source with the VLA in February 2006, the flux density at 20 cm had risen to 13 mJy. Although the source was not detected in the Parkes Multibeam Pulsar Survey conducted before the X-ray outburst, we obtained fast-sampling observations at Parkes in March of this year and discovered strong radio pulses at the 5.5 s rotation period of the neutron star. We report here on our subsequent observational campaign which has included observations with a variety of single-dish telescopes at frequencies ranging from 0.3 to 300 GHz, and with the ATCA, the VLA, and the VLBA. We have obtained a first-epoch position accurate to better than 0.5 mas, which will allow us to set a stringent constraint on the proper motion of a magnetar for the first time. We have also produced a good HI absorption measurement, have detected strong interstellar scintillation above 10 GHz, and have collected a wealth of data on the frequency- and time-dependent pulse profile which is providing our first detailed window into the magnetosphere of a magnetar.

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