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Related papers: Variable and Transient Radio Sources in the FIRST …

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We discuss the first results from the Faint Sky Variability Survey (Groot et al. 2000). The data consist of V-band light curves, BVI colours, astrometry, and morphology information on several hundred thousand point and extended sources in…

Astrophysics · Physics 2009-09-25 M. E. Everett , M. E. Huber , S. B. Howell

Astronomical objects that change rapidly give us insight into extreme environments, allowing us to identify new phenomena, test fundamental physics, and probe the Universe on all scales. Transient and variable radio sources range from the…

Solar and Stellar Astrophysics · Physics 2026-01-27 Tara Murphy , David L. Kaplan

Recently, there have been reports of six bright, dispersed bursts of coherent radio emission found in pulsar surveys with the Parkes Multi-beam Receiver. Not much is known about the progenitors of these bursts, but they are…

High Energy Astrophysical Phenomena · Physics 2013-09-10 T. E. Hassall , E. F. Keane , R. P. Fender

The Variables and Slow Transients (VAST) Survey on the Australian SKA Pathfinder (ASKAP) is designed to systematically explore the dynamic radio sky, detecting sources that vary on timescales from minutes to several years. In this paper, we…

The sensitivity and field of view of the MeerKAT radio telescope provides excellent opportunities for commensal transient searches. We carry out a commensal transient search in supernova and short gamma-ray burst fields using methodologies…

High Energy Astrophysical Phenomena · Physics 2025-06-24 S. I. Chastain , A. J. van der Horst , A. Horesh , A. Rowlinson , A. Andersson , R. Diretse , M. Vaccari , R. P. Fender , P. A. Woudt

Discoveries of rotating radio transients and fast radio bursts (FRBs) in pulsar surveys suggest that more of such transient sources await discovery in archival data sets. Here we report on a single-pulse search for dispersed radio bursts…

High Energy Astrophysical Phenomena · Physics 2015-12-02 A. Rane , D. R. Lorimer , S. D. Bates , N. McMann , M. A. McLaughlin , K. Rajwade

Using newly released data from the Wide-field Infrared Survey Explorer, we report the discovery of rapid infrared variability in three radio-loud narrow-line Seyfert 1 galaxies (NLS1s) selected from the 23 sources in the sample of Yuan et…

High Energy Astrophysical Phenomena · Physics 2015-06-11 Ning Jiang , Hong-Yan Zhou , Luis C. Ho , Weimin Yuan , Ting-Gui Wang , Xiao-Bo Dong , Peng Jiang , Tuo Ji , Qiguo Tian

Here I will review the high time resolution radio sky, focusing on millisecond scales. This is primarily occupied by neutron stars, the well-known radio pulsars and the recently identified group of transient sources known as Rotating RAdio…

Solar and Stellar Astrophysics · Physics 2010-08-24 E. F. Keane

This paper presents the first high-resolution and high-sensitivity study of the radio properties of optically selected type~2 quasars. We used the Very Large Array at 8.4 GHz to observe 59 sources drawn from the Sloan Digital Sky Survey…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 Dharam Vir Lal , Luis C. Ho

In this paper we compile the analysis of ~ 200 synchrotron flare events from ~ 90 distinct objects/events for which the distance is well established, and hence the peak luminosity can be accurately estimated. For each event we measure this…

High Energy Astrophysical Phenomena · Physics 2015-06-23 M. Pietka , R. P. Fender , E. F. Keane

We present the V band variability analysis of the point sources in the Faint Sky Variability Survey on time scales from 24 minutes to tens of days. We find that about one percent of the point sources down to V = 24 are variables. We discuss…

Robust fast methods to classify variable light curves in large sky surveys are becoming increasingly important. While it is relatively straightforward to identify common periodic stars and particular transient events (supernovae, novae,…

(Abridged) We construct a catalog of radio sources detected by the GB6 (6 cm), FIRST and NVSS (20 cm), and WENSS (92 cm) radio surveys, and the SDSS optical survey. The 2.7 million entries in the publicly-available master catalog are…

Astrophysics · Physics 2009-01-16 Amy E. Kimball , Željko Ivezić

The Quintuplet cluster, located in the Galactic centre, is one of the few young massive clusters in the Milky Way. It allows us to study dozens of massive, post main sequence stars individually, providing unique insights into the properties…

Astrophysics of Galaxies · Physics 2025-07-30 M. Cano-González , R. Schödel , A. Alberdi , J. Moldón , M. Pérez-Torres , F. Najarro , A. T. Gallego-Calvente

In this paper, the availability of multi-wavelength optical/infrared information of FIRST (Faint Images of the Radio Sky at 20 cm) radio sources counterparts over ~9.2 deg^{2} in Bootes field and ~2.4 deg^{2} in Cetus field is exploited to…

Cosmology and Nongalactic Astrophysics · Physics 2009-11-13 Khadija EL Bouchefry

Up till now very few dying sources were known, presumably because the dying phase is short at centimeter wavelengths. We therefore have tried to improve the statistics on sources that have ceased to be active, or are intermittently active.…

Astrophysics · Physics 2009-11-13 P. Parma , M. Murgia , H. R. de Ruiter , R. Fanti , K. -H. Mack , F. Govoni

Based on the FIRST and SDSS catalogues a flux density limited sample of weak Compact Steep Spectrum (CSS) sources with radio luminosity below 10^26 [W/Hz] at 1.4 GHz has been constructed. Our previous multifrequency observations of CSS…

Cosmology and Nongalactic Astrophysics · Physics 2010-11-11 Magdalena Kunert-Bajraszewska , Peter Thomasson

We present a new sample of 30 nearby (z<0.2) BL Lacs, selected to study the nuclear as well as the large scale properties of low power radio sources. In this first paper, we show and discuss new radio data taken with the VLA (19 objects at…

Astrophysics · Physics 2009-11-10 M. Giroletti , G. Giovannini , G. B. Taylor , R. Falomo

Whether radio intermediate quasars possess relativistic jets as radio-loud quasars is an important issue in the understanding of the origin of radio emission in quasars. In this letter, using the two-epoch radio data obtained during Faint…

Astrophysics · Physics 2009-11-11 Tinggui Wang , Hongyan Zhou , Junxian Wang , Youjun Lu , Yu Lu