We report the detection of a strong jet–cloud interaction at a distance of 120 kpc from the nucleus of the radio galaxy 3C34, which has redshift z = 0.69. Hubble Space Telescope images of the radio galaxy show a long narrow region of blue emission orientated along the radio axis and directed towards a radio hotspot. The William Herschel Telescope has been used to provide long–slit spectroscopic...

Context. The ROSAT X-ray source 1RXS J141256.0+792204 has recently been identified as a likely compact object whose properties suggest it could be a very nearby radio millisecond pulsar at d = 80 − 260 pc. Aims. We investigated this hypothesis by searching for radio pulsations using the Westerbork Synthesis Radio Telescope. Methods. We observed 1RXS J141256.0+792204 at 385 and 1380 MHz, recordi...

The localization of fast radio bursts (FRBs) has been hindered by the poor angular resolution of the detection observations and inconclusive identification of transient or variable counterparts. Recently a γ-ray pulse of 380 s duration has been associated with the fast radio burst FRB 131104. We report on radio-continuum imaging observations of the original localization region of the FRB, begin...

ABSTRACT We have observed the canonical gigahertz-peaked spectrum source 0108]388 with the Very Long Baseline Array at a range of frequencies above and below the spectral peak. The activity that dominates the radio emission from 0108]388, which is also classiÐed as a compact symmetric object, is thought to be less than 1000 years old. We present strong evidence that the spectral turnover in 010...

In 1999, the highly compact and variable BL Lac object AO 0235+164 was identified as the highest brightness temperature active galactic nucleus observed with the VLBI Space Observatory Programme (VSOP), with TB > 5.8× 1013K (Frey et al. 2000). The sub-milliarcsec radio structure of this source has been studied with dualfrequency (1.6 and 5GHz), polarization-sensitive VSOP observations during 20...

1556-6072/09/$25.00©2009IEEE IEEE VEHICULAR TECHNOLOGY MAGAZINE | JUNE 2009 Digital Object Identifier 10.1109/MVT.2009.932543 The radio spectrum is a precious resource that underpins various wireless services. It is traditionally regulated by a fixed frequency assignment policy, which allocates frequency bands to license holders for exclusive use. Such a static and rigid spectrum-licensing poli...

In order to further test our hypothesis that jets and disk around compact accreting objects are symbi-otic features we investigate the newly discovered superlu-minal galactic radio jets GRS 1915+105 and GRO J1655-40 and other galactic radio jets like 1E1740-2942, GRS 1758-258 and SS 433 within the framework of our coupled jet/disk model developed initially for active galactic nuclei (AGN) and t...

In Radio Frequency Identification (RFID) technology, an adversary may access classified information about an object tagged with RFID tag. Therefore, authentication is a necessary requirement. Use of multiple tags in an object increases the detection probability and simultaneously ensures availability of multiple resources in the form of memory and computability. Authentication process in multi-...

Interrogating an object with a light beam and analyzing the scattered light can reveal kinematic information about the object, which is vital for applications ranging from autonomous vehicles to gesture recognition and virtual reality. We show that by analyzing the change in the orbital angular momentum (OAM) of a tilted light beam eclipsed by a moving object, lateral motion of the object can b...

We present the first direct measurements of bidirectional motions in an extragalactic radio jet. The radio source 1946+708 is a compact symmetric object with striking S-symmetry identified with a galaxy at a redshift of 0.101. From observations 2 years apart we have determined the velocities of four compact components in the jet, the fastest of which has an apparent velocity of 1.09 h-1c. By pa...