The extended X-ray emission around RRAT J1819-1458

Abstract

We present new imaging and spectral analysis of the recently discovered extended X-ray emission around the high magnetic field rotating radio transient RRAT J1819-1458. We used two Chandra observations performed for this object in 2008 May 31 and 2011 May 28, respectively. The diffuse X-ray emission was detected with a significance of \sim19 sigma in the image obtained by combining the two observations. Neither long-term spectral nor timing variability have been observed from the source or the nebula. RRAT J1819-1458 shows an unusual high X-ray efficiency of L_x(0.3-5 keV)/Edot_{rot} \sim 0.15 at converting spin-down power into X-ray luminosity. The most favourable scenario for the origin of this extended X-ray emission is either a pulsar-wind nebula (PWN) or a scattering halo. A magnetically powered scenario for the extended emission is viable only in the case of a Compton nebula, while can be tentatively disfavoured in the case of synchrotron emission.

8 pages, 8 figures. Accepted 2012 November 28. Received 2012 October 8

References in corpus (5)

• Discovery of Pulsations and a Possible Spectral Feature in the X-ray Emission from Rotating Radio Transient J1819-1458
• Non-Thermal X-ray Properties of Rotation Powered Pulsars and Their Wind Nebulae
• Discovery of extended X-ray emission around the highly magnetic RRAT J1819-1458
• XMM-Newton view of Swift J1834.9-0846 and its Magnetar Wind Nebula
• Extinction and Distance to Anomalous X-ray Pulsars from X-ray Scattering Halos

Cited by in corpus (10)

• Magnetars
• The discovery, monitoring and environment of SGR J1935+2154
• The wind nebula around magnetar Swift J1834.9-0846
• XMM-Newton reveals a candidate period for the spin of the "Magnificent Seven" neutron star RX J1605.3+3249
• A Long-term study of three rotating radio transients
• From young to old: the evolutionary path of Pulsar Wind Nebulae
• PSR J1119-6127 and its pulsar wind nebula following the magnetar-like bursts
• Simultaneous X-ray and Radio Observations of Rotating Radio Transient J1819-1458
• Long-term evolution of RRAT J1819-1458
• On the possible wind nebula of magnetar Swift J1834.9-0846: a magnetism-powered synchrotron nebula