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Related papers: The ASKAP Variables and Slow Transients (VAST) Ext…

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Variability Search Toolkit (VaST) is a software package designed to find variable objects in a series of sky images. It can be run from a script or interactively using its graphical interface. VaST relies on source list matching as opposed…

Instrumentation and Methods for Astrophysics · Physics 2017-12-19 Kirill V. Sokolovsky , Alexandr A. Lebedev

We have carried out a dedicated transient survey of 300 deg$^2$ of the SDSS Stripe 82 region using the Giant Meterwavelength Radio Telescope (GMRT) at 150 MHz. Our multi-epoch observations, together with the TGSS survey, allow us to probe…

Instrumentation and Methods for Astrophysics · Physics 2019-10-24 A. Hajela , K. P. Mooley , H. T. Intema , D. A. Frail

We identified a highly-polarized, steep-spectrum radio source in a deep image with the Australian Square Kilometre Array Pathfinder (ASKAP) telescope at 888 MHz. After considering and rejecting a stellar origin for this source, we…

We present the discovery of a sample of 18 low-redshift (z<0.3) galaxies with transient nuclear radio emission. These galaxies are not or weakly detected in the Faint Images of the Radio Sky at Twenty cm survey performed on 1993-2009, but…

Astrophysics of Galaxies · Physics 2022-10-26 Fabao Zhang , Xinwen Shu , Luming Sun , Lei Yang , Ning Jiang , Liming Dou , Jianguo Wang , Tinggui Wang

We present more than 80 new variable stars discovered during the first observing season of the APACHE survey. APACHE is a project aimed at detecting extrasolar planets transiting nearby, bright M dwarfs by using an array of small-aperture…

A comprehensive search for variable and transient radio sources has been conducted using ~55,000 snapshot images of the FIRST survey. We present an analysis leading to the discovery of 1,627 variable and transient objects down to mJy levels…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-30 Nithyanandan Thyagarajan , David J. Helfand , Richard L. White , Robert H. Becker

A new generation of radio telescopes with excellent sensitivity, instantaneous {\it uv} coverage, and large fields of view, are providing unprecedented opportunities for performing commensal transient searches. Here we present such a…

High Energy Astrophysical Phenomena · Physics 2023-09-18 S. I. Chastain , A. J. van der Horst , A. Rowlinson , L. Rhodes , A. Andersson , R. Diretse , R. P. Fender , P. A. Woudt

We have observed the G23 field of the Galaxy And Mass Assembly (GAMA) survey using the Australian Square Kilometre Array Pathfinder (ASKAP) in its commissioning phase, to validate the performance of the telescope and to characterize the…

Early science observations from the Australian Square Kilometre Array Pathfinder (ASKAP) have revealed clear signals of diffuse radio emission associated with two clusters detected by the South Pole Telescope via their Sunyaev Zel'dovich…

The WASP (Wide Angle Search for Planets) project is an exoplanet transit survey that has been automatically taking wide field images since 2004. Two instruments, one in La Palma and the other in South Africa, continually monitor the night…

We describe an ongoing variable star search program and present the first reduced results of a search in a 19 square degree (4.4\circle x 4.4\circle) field centered on J2000 {\alpha} = 22:03:24, {\delta} = +18:54:32. The search was carried…

Astrophysics of Galaxies · Physics 2011-02-01 Michael D. Williams , E. F. Milone

One of the Survey Science Projects that the Australian Square Kilometre Array Pathfinder (ASKAP) telescope will do in its first few years of operation is a study of the 21-cm line of HI and the 18-cm lines of OH in the Galactic Plane and…

Radio emission has been detected in a broad variety of stellar objects from all stages of stellar evolution. However, most of our knowledge originates from targeted observations of small samples, which are strongly biased to sources which…

Solar and Stellar Astrophysics · Physics 2015-10-07 G. Umana , C. Trigilio , T. M. O. Franzen , R. P. Norris , P. Leto , A. Ingallinera , C. S. Buemi , C. Agliozzo , F. Cavallaro , L. Cerrigone

The Planck-ATCA Co-eval Observations (PACO) have provided flux density measurements of well defined samples of AT20G radio sources at frequencies below and overlapping with Planck frequency bands, almost simultaneously with Planck…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 Marcella Massardi , Anna Bonaldi , Laura Bonavera , Marcos López-Caniego , Gianfranco De Zotti , Ronald D. Ekers

We are carrying out the GPPS survey by using the FAST, the most sensitive systematic pulsar survey in the Galactic plane. In addition to about 500 pulsars already discovered through normal periodical search, we report here the discovery of…

We report the first results of a study of variable point sources identified using multi-color time-series photometry from Sloan Digital Sky Survey (SDSS) Stripe 82 over a span of nearly 10 years (1998-2007). We construct a light-curve…

Solar and Stellar Astrophysics · Physics 2014-11-20 Waqas A. Bhatti , Michael W. Richmond , Holland C. Ford , Larry D. Petro

MeerTRAP is a real-time untargeted search project using the MeerKAT telescope to find single pulses from fast radio transients and pulsars. It is performed commensally with the MeerKAT large survey projects (LSPs), using data from up to 64…

High Energy Astrophysical Phenomena · Physics 2022-03-14 M. C. Bezuidenhout , E. Barr , M. Caleb , L. N. Driessen , F. Jankowski , M. Kramer , M. Malenta , V. Morello , K. Rajwade , S. Sanidas , B. W. Stappers , M. Surnis

We present two new radio continuum images from the ASKAP POSSUM survey in the direction of the Small Magellanic Cloud. The two new source lists contain 36,571 radio continuum sources detected at 944 MHz and 15,227 sources at 1367 MHz, with…

Astrophysics of Galaxies · Physics 2025-11-14 O. K. Khattab , M. D. Filipovic' , Z. J. Smeaton , R. Z. E. Alsaberi , E. J. Crawford , D. Leahy , S. Dai , N. Rajabpour
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