We report the discovery of non-thermal pulsed X-ray/soft γ-ray emission up to ∼ 150 keV from the anomalous X-ray pulsar AXP 1E 1841-045 located near the centre of supernova remnant Kes 73 using RXTE PCA and HEXTE data. The morphology of the double-peaked pulse profile changes rapidly with energy from 2 keV up to ∼ 8 keV, above which the pulse shape remains more or less stable. The pulsed spectr...

This research focuses on the development of a retrieval and modification system for reusing a machining process plan of an axisymmetric part for a new part. The proposed system is capable of retrieving the most relevant case of which the finished part is similar to the new desired part, and then modifying the retrieved case to meet the new requirements. The system uses a featurebased representa...

The ACIS instrument has been operating for three years in orbit, producing high quality scientific data on a wide variety of X-ray emitting astronomical objects. Except for a brief period at the very beginning of the mission when the CCDs were exposed to the radiation environment of the Outer van Allen Belts which resulted in substantial radiation damage to the front illuminated CCDs, the instr...

Abstract We present Chandra ACIS imaging spectroscopy of the nucleus Seyfert 2 Galaxy Mrk 34. identify spatially and spectrally resolved features in band that includes Fe K α , xxv, xxvi . These suggest high-velocity (≳15,000 km s −1 line-of-sight) material spanning ∼0.″5, within ∼200 pc nucleus. This outflow could have deprojected velocities ∼12–28× greater than [O iii ]-emitting outflows, pot...

We present a small sample of ̧X-ray sources selected from the fields of ACIS observations which probe fluxes around the break in the hard band source counts. The targets of these fields include 9 nearby galaxy clusters, 1 distant cluster and 2 powerful radio galaxy fields. The follow-up of this serendipitous sample was biased towards X-ray hard and optically-dim sources mostly not seen on the D...