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The variable radio-to-X-ray spectrum of the magnetar XTE J1810-197

ArXiv 0705.4095 (2007)

Authors:

F Camilo, SM Ransom, J Penalver, A Karastergiou, MH van Kerkwijk, M Durant, JP Halpern, J Reynolds, C Thum, DJ Helfand, N Zimmerman, I Cognard

Abstract:

We have observed the 5.54s anomalous X-ray pulsar XTE J1810-197 at radio, millimeter, and infrared (IR) wavelengths, with the aim of learning about its broad-band spectrum. At the IRAM 30m telescope, we have detected the magnetar at 88 and 144GHz, the highest radio-frequency emission ever seen from a pulsar. At 88GHz we detected numerous individual pulses, with typical widths ~2ms and peak flux densities up to 45Jy. Together with nearly contemporaneous observations with the Parkes, Nancay, and Green Bank telescopes, we find that in late 2006 July the spectral index of the pulsar was -0.5
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Evidence for a jet contribution to the optical/infrared light of neutron star X-ray binaries

(2007)

Authors:

DM Russell, RP Fender, PG Jonker
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A highly polarised radio jet during the 1998 outburst of the black hole transient XTE J1748-288

(2007)

Authors:

Catherine Brocksopp, James Miller-Jones, Rob Fender, Ben Stappers
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The jet-powered optical nebula of Cygnus X–1

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 376:3 (2007) 1341-1349

Authors:

DM Russell, RP Fender, E Gallo, CR Kaiser
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The Magnificent Seven in the dusty prairie: The role of interstellar absorption on the observed neutron star population

Astrophysics and Space Science 308:1-4 (2007) 171-179

Authors:

B Posselt, SB Popov, F Haberl, J Trümper, R Turolla, R Neuhäuser

Abstract:

The Magnificent Seven have all been discovered by their exceptional soft X-ray spectra and high ratios of X-ray to optical flux. They all are considered to be nearby sources. Searching for similar objects with larger distances, one expects larger interstellar absorption resulting in harder X-ray counterparts. Current interstellar absorption treatment depends on chosen abundances and scattering cross-sections of the elements as well as on the 3D distribution of the interstellar medium. After a discussion of these factors we use the comprehensive 3D measurements of the Local Bubble by Lallement et al. (2003, Astron. Astrophys. 411, 447) to construct two simple models of the 3D distribution of the hydrogen column density. We test these models by using a set of soft X-ray sources with known distances. Finally, we discuss possible applications for distance estimations and population synthesis studies. © Springer Science+Business Media B.V. 2007.
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