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Two WSRT observations were performed and five archival VLA data were reduced in order to redetect the enigmatic radio transient GCRT J1745-3009. The source was not redetected. We were, however, able to extract important new information from…

Astrophysics of Galaxies · Physics 2015-05-13 H. Spreeuw , B. Scheers , R. Braun , R. A. M. J. Wijers , J. C. A. Miller-Jones , B. W. Stappers , R. P. Fender

The vast majority of known non-accreting neutron stars (NSs) are rotation-powered radio and/or gamma-ray pulsars. So far, their multiwavelength spectra have all been described satisfactorily by thermal and non-thermal continuum models, with…

High Energy Astrophysical Phenomena · Physics 2015-06-11 Oleg Kargaltsev , Martin Durant , Zdenka Misanovic , George Pavlov

We have carried out a search for radio emission at 820 MHz from six X-ray dim isolated neutron stars with the Robert C. Byrd Green Bank Radio Telescope. No transient or pulsed emission was found using fast folding, fast Fourier transform,…

Astrophysics of Galaxies · Physics 2010-01-06 V. I. Kondratiev , M. A. McLaughlin , D. R. Lorimer , M. Burgay , A. Possenti , R. Turolla , S. B. Popov , S. Zane

The phenomenon of fast radio bursts (FRBs) was discovered in 2007. These are powerful (0.1-100 Jy) single radio pulses with durations of several milliseconds, large dispersion measures, and record high brightness temperatures suggesting…

High Energy Astrophysical Phenomena · Physics 2018-12-14 S. B. Popov , K. A. Postnov , M. S. Pshirkov

PSR J1819-1458 is a rotating radio transient (RRAT) source with an inferred surface dipole magnetic field strength of 5e13 G and a 4.26-s spin period. We present XMM-Newton observations of the X-ray counterpart of this source, CXOU…

High amplitude, nearly coherent X-ray brightness oscillations during thermonuclear X-ray bursts were discovered with the Rossi X-ray Timing Explorer (RXTE) in early 1996. Spectral and timing evidence strongly supports the conclusion that…

Astrophysics · Physics 2009-10-31 Tod E. Strohmayer

We consider the currently observed spin distributions of various types of neutron stars, including isolated and binary radio millisecond pulsars in the Galactic plane and globular cluster system as well as neutron stars in low-mass X-ray…

Solar and Stellar Astrophysics · Physics 2015-05-13 J. W. T. Hessels

The main reasons for searching for pulsars are to: (i) get an accurate census of the neutron star population and its origin and evolution; (ii) connect neutron stars to other stellar populations in the Galaxy and globular clusters; (iii)…

Astrophysics of Galaxies · Physics 2015-05-20 D. R. Lorimer

Fast Radio Bursts (FRBs) are a class of short-duration transients at radio wavelengths with inferred astrophysical origin. The prototypical FRB is a broadband signal that occurs over the extent of the receiver frequency range, is narrow in…

Instrumentation and Methods for Astrophysics · Physics 2018-09-12 Griffin Foster , Aris Karastergiou , Marisa Geyer , Mayuresh Surnis , Golnoosh Golpayegani , Kejia Lee , Duncan Lorimer , Danny C. Price , Kaustubh Rajwade

The EGRET catalogue of unidentified X-ray sources has more objects along the galactic disk than at high galactic latitude, where identifications are comparatively easier. On the other hand, the Egret/GRO mission has already identified…

Astrophysics · Physics 2009-10-30 P. A. Caraveo , G. F. Bignami

The discovery of the `Lorimer Burst', a little over a decade ago, ignited renewed interest in searching for short-duration radio transients. This event is now considered to be the first established Fast Radio Burst (FRB), which is a class…

High Energy Astrophysical Phenomena · Physics 2018-04-18 J. W. T. Hessels

Sixteen years of observations of black hole transients with the Rossi X-ray Timing Explorer, complemented by other X-ray observatories and ground-based optical/infrared/radio telescopes have given us a clear view of the complex…

High Energy Astrophysical Phenomena · Physics 2011-09-20 Tomaso M. Belloni , Sara E. Motta , Teodoro Muñoz-Darias

The first millisecond X-ray variability phenomena from accreting compact objects have recently been discovered with the Rossi X-ray Timing Explorer. Three new phenomena are observed from low-mass X-ray binaries containing low-magnetic-field…

Astrophysics · Physics 2008-11-26 M. van der Klis

Long-period transients are an elusive class of compact objects uncovered by radio surveys. While magnetars are a leading candidate for those sources that appear isolated, several observational properties challenge the established…

High Energy Astrophysical Phenomena · Physics 2026-03-13 Arthur G. Suvorov , Clara Dehman , José A. Pons

Fast radio bursts (FRBs) are brilliant short-duration flashes of radio emission originating at cosmological distances. The vast diversity in the properties of currently known FRBs, and the fleeting nature of these events make it difficult…

Variability is a common characteristic of magnetically active stars. Flaring variability is usually interpreted as the observable consequence of transient magnetic reconnection processes happening in the stellar outer atmosphere. Stellar…

Astrophysics · Physics 2009-06-23 Rachel A. Osten

Radio pulsars are unique laboratories for a wide range of physics and astrophysics. Understanding how they are created, how they evolve and where we find them in the Galaxy, with or without binary companions, is highly constraining of…

High Energy Astrophysical Phenomena · Physics 2016-02-26 Victoria M. Kaspi , Michael Kramer

The study of transient and variable low-frequency radio sources is a key goal for LOFAR, with an extremely broad science case ranging from relativistic jets sources to pulsars, exoplanets, radio bursts at cosmological distances, the…

Being fast rotating objects, isolated neutron stars (INSs) are obvious targets for high-time resolution observations. With the number of optical/UV/IR INS detections now increased to 24, timing observations become more and more important in…

High Energy Astrophysical Phenomena · Physics 2015-06-03 R. P. Mignani

Anomalous X-ray pulsars and soft gamma repeaters have recently emerged as a unified class of neutron stars, identified by dramatic X-ray and gamma-ray outbursts and via luminous X-ray pulsations, both thought to be powered by the decay of…

High Energy Astrophysical Phenomena · Physics 2015-05-20 C. -Y. Ng , V. M. Kaspi
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