Suzaku Discovery of a Hard X-Ray Tail in the Persistent Spectra from the Magnetar 1E 1547.0-5408 during its 2009 Activity - Astrophysics > High Energy Astrophysical PhenomenaReportar como inadecuado




Suzaku Discovery of a Hard X-Ray Tail in the Persistent Spectra from the Magnetar 1E 1547.0-5408 during its 2009 Activity - Astrophysics > High Energy Astrophysical Phenomena - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: The fastest-rotating magnetar 1E 1547.0-5408 was observed in broad-bandX-rays with Suzaku for 33 ks on 2009 January 28-29, 7 days after the onset ofits latest bursting activity. After removing burst events, theabsorption-uncorrected 2-10 keV flux of the persistent emission was measuredwith the XIS as 5.7e-11 ergs cm-2 s-1, which is 1-2 orders of magnitude higherthan was measured in 2006 and 2007 when the source was less active. Thepersistent emission was also detected significantly with the HXD in >10 keV upto at least ~110 keV, with an even higher flux of 1.3e-10 ergs cm-2 s-1 in20-100 keV. The pulsation was detected at least up to 70 keV at a period of2.072135+-0.00005 s, with a deeper modulation than was measured in a fainterstate. The phase-averaged 0.7-114 keV spectrum was reproduced by an absorbedblackbody emission with a temperature of 0.65+-0.02 keV, plus a hard power-lawwith a photon index of ~1.5. At a distance of 9 kpc, the bolometric luminosityof the blackbody and the 2-100 keV luminosity of the hard power-law areestimated as 6.2+-1.2e+35 ergs s-1 and 1.9e+36 ergs s-1, respectively, whilethe blackbody radius becomes ~5 km. Although the source had not been detectedsignificantly in hard X-rays during the past fainter states, a comparison ofthe present and past spectra in energies below 10 keV suggests that the hardcomponent is more enhanced than the soft X-ray component during the persistentactivity.



Autor: Enoto Teruaki 1, Nakazawa Kazuhiro 1, Makishima Kazuo 1 and 2, Nakagawa E. Yujin 2, Sakamoto Takanori 3, Ohno Masanori 4, Takahas

Fuente: https://arxiv.org/



DESCARGAR PDF




Documentos relacionados