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The Wide Field Camera Transit Survey is a pioneer program aimed to search for extra-solar planets in the near-infrared. The standard data reduction pipeline of the program uses aperture photometry to construct the light curves. We…

Efficient identification and follow-up of astronomical transients is hindered by the need for humans to manually select promising candidates from data streams that contain many false positives. These artefacts arise in the difference images…

We propose MFT -- Multi-Flow dense Tracker -- a novel method for dense, pixel-level, long-term tracking. The approach exploits optical flows estimated not only between consecutive frames, but also for pairs of frames at logarithmically…

Computer Vision and Pattern Recognition · Computer Science 2023-11-13 Michal Neoral , Jonáš Šerých , Jiří Matas

We present multiwavelength, multi-telescope, ground-based follow-up photometry of the white dwarf WD 1145+017, that has recently been suggested to be orbited by up to six or more, short-period, low-mass, disintegrating planetesimals. We…

Since their invention in the 1980s [1], optical tweezers have found a wide range of applications, from biophotonics and mechanobiology to microscopy and optomechanics [2, 3, 4, 5]. Simulations of the motion of microscopic particles held by…

This paper proposes a novel parametric identification approach for linear systems using Deep Learning (DL) and the Modified Relay Feedback Test (MRFT). The proposed methodology utilizes MRFT to reveal distinguishing frequencies about an…

Systems and Control · Electrical Eng. & Systems 2020-10-20 Abdulla Ayyad , Mohamad Chehadeh , Mohammad I. Awad , Yahya Zweiri

The Palomar Transient Factory (PTF) is a synoptic sky survey in operation since 2009. PTF utilizes a 7.1 square degree camera on the Palomar 48-inch Schmidt telescope to survey the sky primarily at a single wavelength (R-band) at a rate of…

Instrumentation and Methods for Astrophysics · Physics 2015-01-27 J. Surace , R. Laher , F. Masci , C. Grillmair , G. Helou

For transient sources with timescales of 1-100 seconds, standardized imaging for all observations at each time step become impossible as large modern interferometers produce significantly large data volumes in this observation time frame.…

Instrumentation and Methods for Astrophysics · Physics 2022-04-06 Xia Zhang , Foivos I. Diakogiannis , Richard Dodson , Andreas Wicenec

At present time Robotic observatory making is of current importance. Having a large field of view and being able to point at anywhere, Robotic astronomical systems are indispensable when they looking for transients like grb, supernovae…

The introduction of deep wide-field surveys in recent years and the adoption of machine learning techniques have led to the discoveries of $\mathcal{O}(10^4)$ strong gravitational lensing systems and candidates. However, the discovery of…

Cosmology and Nongalactic Astrophysics · Physics 2024-07-30 William Sheu , Xiaosheng Huang , Aleksandar Cikota , Nao Suzuki , David Schlegel , Christopher Storfer

Since the start of the Wide Angle Search for Planets (WASP) program, more than 160 transiting exoplanets have been discovered in the WASP data. In the past, possible transit-like events identified by the WASP pipeline have been vetted by…

Modern time-domain surveys continuously monitor large swaths of the sky to look for astronomical variability. Astrophysical discovery in such data sets is complicated by the fact that detections of real transient and variable sources are…

Instrumentation and Methods for Astrophysics · Physics 2015-06-11 Henrik Brink , Joseph W. Richards , Dovi Poznanski , Joshua S. Bloom , John Rice , Sahand Negahban , Martin Wainwright

HERMES (High Energy Rapid Modular Ensemble of Satellites) pathfinder is an in-orbit demonstration consisting of a constellation of six 3U nano-satellites hosting simple but innovative detectors for the monitoring of cosmic high-energy…

High Energy Astrophysical Phenomena · Physics 2023-09-06 Riccardo Crupi , Giuseppe Dilillo , Kester Ward , Elisabetta Bissaldi , Fabrizio Fiore , Andrea Vacchi

We introduce a method for detecting astrophysical transients evolving on timescales of milliseconds to minutes using cosmic microwave background (CMB) survey telescopes. While previous transient searches in CMB data operate in map space,…

To effectively search for the optimal motion template in dynamic multidimensional space, this paper proposes a novel optimization algorithm, Dynamic Dimension Wrapping (DDW).The algorithm combines Dynamic Time Warping (DTW) and Euclidean…

Machine Learning · Computer Science 2024-11-18 Dongnan Jin , Yali Liu , Qiuzhi Song , Xunju Ma , Yue Liu , Dehao Wu

We introduce Deep-HiTS, a rotation invariant convolutional neural network (CNN) model for classifying images of transients candidates into artifacts or real sources for the High cadence Transient Survey (HiTS). CNNs have the advantage of…

Instrumentation and Methods for Astrophysics · Physics 2017-02-22 Guillermo Cabrera-Vives , Ignacio Reyes , Francisco Förster , Pablo A. Estévez , Juan-Carlos Maureira

We present the results of a four-month campaign searching for low-frequency radio transients near the North Celestial Pole with the Low-Frequency Array (LOFAR), as part of the Multifrequency Snapshot Sky Survey (MSSS). The data were…

High Energy Astrophysical Phenomena · Physics 2016-06-21 A. J. Stewart , R. P. Fender , J. W. Broderick , T. E. Hassall , T. Muñoz-Darias , A. Rowlinson , J. D. Swinbank , T. D. Staley , G. J. Molenaar , B. Scheers , T. L. Grobler , M. Pietka , G. Heald , J. P. McKean , M. E. Bell , A. Bonafede , R. P. Breton , D. Carbone , Y. Cendes , A. O. Clarke , S. Corbel , F. de Gasperin , J. Eislöffel , H. Falcke , C. Ferrari , J. -M. Grießmeier , M. J. Hardcastle , V. Heesen , J. W. T. Hessels , A. Horneffer , M. Iacobelli , P. Jonker , A. Karastergiou , G. Kokotanekov , V. I. Kondratiev , M. Kuniyoshi , C. J. Law , J. van Leeuwen , S. Markoff , J. C. A. Miller-Jones , D. Mulcahy , E. Orru , M. Pandey-Pommier , L. Pratley , E. Rol , H. J. A. Röttgering , A. M. M. Scaife , A. Shulevski , C. A. Sobey , B. W. Stappers , C. Tasse , A. J. van der Horst , S. van Velzen , R. J. van Weeren , R. A. M. J. Wijers , R. Wijnands , M. Wise , P. Zarka , A. Alexov , J. Anderson , A. Asgekar , I. M. Avruch , M. J. Bentum , G. Bernardi , P. Best , F. Breitling , M. Brüggen , H. R. Butcher , B. Ciardi , J. E. Conway , A. Corstanje , E. de Geus , A. Deller , S. Duscha , W. Frieswijk , M. A. Garrett , A. W. Gunst , M. P. van Haarlem , M. Hoeft , J. Hörandel , E. Juette , G. Kuper , M. Loose , P. Maat , R. McFadden , D. McKay-Bukowski , J. Moldon , H. Munk , M. J. Norden , H. Paas , A. G. Polatidis , D. Schwarz , J. Sluman , O. Smirnov , M. Steinmetz , S. Thoudam , M. C. Toribio , R. Vermeulen , C. Vocks , S. J. Wijnholds , O. Wucknitz , S. Yatawatta

With their wide fields of view and often relatively long coverage of any position in the sky in imaging survey mode, modern radio telescopes provide a data stream that is naturally suited to searching for rare transients. However, Radio…

We present multi-wavelength photometric monitoring of WD 1145+017, a white dwarf exhibiting periodic dimming events interpreted to be the transits of orbiting, disintegrating planetesimals. Our observations include the first set of…

Variable sources probe a wide range of astrophysical phenomena. We present a catalog of over ten million variable source candidates found in Data Release 1 (DR1) of the Zwicky Transient Facility (ZTF). We perform a periodicity search up to…

Solar and Stellar Astrophysics · Physics 2020-11-04 Eran O. Ofek , Maayane Soumagnac , Guy Nir , Avishay Gal-Yam , Peter Nugent , Frank Masci , Shrinivas R. Kulkarni
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