Bright X-ray pulsars: how outflows influence beaming, pulsations and pulse phase lags

Deep Searches for Radio Pulsations and Bursts from Four Southern Anomalous X-ray Pulsars

We have searched for persistent radio pulsations, bright single pulses, and bursts from four Southern anomalous X-ray pulsars (AXPs). Deep observations were conducted at 1.4GHz in 1999 July and August with the Parkes 64-m telescope. For all of the target AXPs, the upper limits on integrated pulsed emission are ∼ 0.02mJy, while the limits on the flux of single pulses are ∼ 1 Jy or better. The co...

(Anomalous) X-ray Pulsars

Prior to the commissioning of BeppoSAX and the Rossi X-ray Timing Observatory in 1996, the so-called “Anomalous” X-ray Pulsars (AXPs) were considered very mysterious sources, because the energy source for their bright X-ray emission was unknown. At the time, there were only 3 known members of this class. They were distinguished by having periods in the narrow range 6–9 s, showing approximately ...

X-ray lines, progenitor and beaming of Gamma-Ray Bursts

X-ray emission features have been detected in at least five GRB afterglows. Their detection and properties are of great importance in our understanding of the nature of the GRB progenitor. Moreover, they provide us with an uncollimated source of photons, allowing us to put firm constraints on the total energy produced in GRBs, and therefore on their degree of collimation. I will review the radi...

The Anomalous X-ray Pulsars

Timing Characteristics of the Hard X-ray Emission from Bright X-ray Pulsars Based on INTEGRAL Data

We review the results of a timing analysis of the observations for ten bright X-ray pulsars (with fluxes > 100 mCrab in the 20-100 keV energy band) that fell within the INTEGRAL field of view from 2003 to 2007. The dependence of the pulse profile on the energy and intrinsic source luminosity has been investigated; particular attention has been paid to searching for changes in the pulse profile ...