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Parkes observations for project P885 semester 2019OCTS_04
We propose to observe the magnetars 1E 1547.0-5408 and PSR J1622-4950
approximately weekly, to track their rotation, flux density, and
polarisation, as we have been doing through this project. Also, as
of late 2018, XTE J1810-197 is again a radio magnetar after 10 years
dormant! Its chaotic rotation is better tracked in detail elsewhere,
but w... moreeekly observations with the UWL receiver are already providing
unique measurements of its radio spectrum and broad-band behaviour.
Our observations provide an important window into remarkably dynamic
magnetar magnetospheres, and characterise the conditions under which
radio emission takes place therein, placing constraints on the
emission mechanisms, which in at least some significant respects
differ from those of ordinary pulsars. less
Astronomical and Space Sciences not elsewhere classified
01 Oct 2019
31 Mar 2020
Creative Commons Attribution 4.0 International Licence
Camilo, Fernando; Johnston, Simon; Sarkissian, John; Reynolds, John; Scholz, Paul; Lower, Marcus (2019): Parkes observations for project P885 semester 2019OCTS_04. v1. CSIRO. Data Collection.
All Rights (including copyright) CSIRO 2019.
Access to this collection's metadata and/or files (if any) are restricted until 30 Sep 2021.
Australia Telescope National Facility
P885 - Understanding the Remarkable Behaviour of Radio Magnetars
Neutron stars are extreme objects, the size of a city but containing the
mass of the Sun. Pulsars are neutron stars with very strong magnetic
fields that rotate rapidly and emit focused beams of radio waves that we
may detect on Earth once with every turn of the star, in light-house-like
fashion. While the typical pulsar has a magnetic field ... morestrength at its
surface approximately a million million times stronger than Earth's, a
special and rare (only 23 are known) class of neutron stars has a field up
to another factor of 1000 stronger - these are the "magnetars", the most
magnetic objects known in the Universe. Magnetars shine in ways that
are different from those of ordinary pulsars. For many years, despite
careful searches, no magnetar was seen to shine at radio wavelengths.
The objects of our programme are different - they have been established
to emit radio pulses with every turn of the star, detected using the Parkes
64-metre dish. We are now learning more about the characteristics of
this unusual radiation, and through it about radio-emitting magnetars. less
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