* Astronomy

Blobrana · L

RE: RRAT J1819-1458

Blobrana · L

Title: Extended X-ray emission around RRAT J1819-1458
Authors: A. Camero-Arranz, N. Rea, M. A. McLaughlin, N. Bucciantini, P. Slane, B. Gaensler, D. Torres, L. Stella, E. de Onña, G. Israel, F. Camilo, A. Possenti

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, taken on 2008 May 31 and 2011 May 28. The diffuse X-ray emission was detected with a significance of ~19sigma in the image obtained by combining the two observations. Long-term spectral variability has not been observed. Possible scenarios for the origin of this diffuse X-ray emission, further detailed in Camero-Arranz et al. (2012), are here discussed.

Read more (566kb, PDF)

Blobrana · L

Title: The extended X-ray emission around RRAT J1819-1458
Authors: A. Camero-Arranz, N. Rea, N. Bucciantini, M. A. McLaughlin, P. Slane, B. M. Gaensler, D. F. Torres, L. Stella, E. de Oña, G. L. Israel, F. Camilo, A. Possenti

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 ~19 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} ~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.

Read more (476kb, PDF)