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200 papers

The Transiting Exoplanet Survey Satellite (TESS) mission measured light from stars in ~75% of the sky throughout its two year primary mission, resulting in millions of TESS 30-minute cadence light curves to analyze in the search for…

The ROTSE-I experiment has generated CCD photometry for the entire Northern sky in two epochs nightly since March 1998. These sky patrol data are a powerful resource for studies of astrophysical transients. As a demonstration project, we…

We perform a detailed analysis and simulations on the transient detection capability in the near-ultraviolet (NUV) band by focusing on some major local transient events. These events include the tidal disruption event due to a supermassive…

Instrumentation and Methods for Astrophysics · Physics 2019-07-31 J. Wang , E. W. Liang , J. Y. Wei

Fast variability of optical objects is an interesting though poorly explored subject in modern astronomy. Real-time data processing and identification of transient celestial events in the images is very important for such study as it allows…

The Star Formation Across Cosmic Time (SFACT) survey is a new narrowband survey designed to detect emission-line galaxies (ELGs) and quasi-stellar objects (QSOs) over a wide range of redshifts in discrete redshift windows. The survey…

Astrophysics of Galaxies · Physics 2023-08-03 David J. Carr , Jennifer Sieben , John J. Salzer , Samantha W. Brunker , Bryce Cousins

We present the first results from a new backend on the Australian Square Kilometre Array Pathfinder, the Commensal Realtime ASKAP Fast Transient COherent (CRACO) upgrade. CRACO records millisecond time resolution visibility data, and…

We describe the development of a system for an automated, iterative, real-time classification of transient events discovered in synoptic sky surveys. The system under development incorporates a number of Machine Learning techniques, mostly…

Instrumentation and Methods for Astrophysics · Physics 2011-10-24 S. G. Djorgovski , C. Donalek , A. Mahabal , B. Moghaddam , M. Turmon , M. Graham , A. Drake , N. Sharma , Y. Chen

When planning a survey for astronomical transients, many factors such as cadence, filter choice, sky coverage, and depth of observations need to be balanced in order to optimize the scientific gain of the survey. Here we present a software…

Instrumentation and Methods for Astrophysics · Physics 2019-10-09 Ulrich Feindt , Jakob Nordin , Mickael Rigault , Valéry Brinnel , Suhail Dhawan , Ariel Goobar , Marek Kowalski

The Sloan Digital Sky Survey (SDSS) is making a multi-colour, three dimensional map of the nearby Universe. The survey is in two parts. The first part is imaging one quarter of the sky in five colours from the near ultraviolet to the near…

Astrophysics · Physics 2019-08-14 Jon Loveday

The Weizmann Fast Astronomical Survey Telescope (W-FAST) is a 55cm optical survey telescope with a high cadence (25Hz) monitoring of the sky over a wide field of view (~7deg^2). The high frame rate allows detection of sub-second transients…

Instrumentation and Methods for Astrophysics · Physics 2021-05-26 Guy Nir , Eran O. Ofek , Sagi Ben-Ami , Noam Segev , David Polishook , Ilan Manulis

We present the discovery of two new X-ray transients in archival Chandra data. The first transient, XRT 110103, occurred in January 2011 and shows a sharp rise of at least three orders of magnitude in count rate in less than 10 s, a flat…

High Energy Astrophysical Phenomena · Physics 2015-05-27 A. Glennie , P. G. Jonker , R. P. Fender , T. Nagayama , M. L. Pretorius

In an area of 3,300 square degrees, a search for pulsed dispersed signals using a neural network has been carried out. During the six-month observation period, pulses were detected from fifteen known pulsars as well as three new rotating…

High Energy Astrophysical Phenomena · Physics 2025-08-18 I. V. Eldarov , S. A. Tyul'bashev , M. A. Kitaeva , G. E. Tyul'basheva

Once completed, the Cherenkov Telescope Array (CTA) will be able to map the gamma-ray sky in a wide energy range from several tens of GeV to some hundreds of TeV and will be more sensitive than previous experiments by an order of magnitude.…

Instrumentation and Methods for Astrophysics · Physics 2018-09-05 Kai Brügge , Alexey Egorov , Christian Bockermann , Katharina Morik , Wolfgang Rhode

The Vera C. Rubin Legacy Survey of Space and Time holds the potential to revolutionize time domain astrophysics, reaching completely unexplored areas of the Universe and mapping variability time scales from minutes to a decade. To prepare…

Instrumentation and Methods for Astrophysics · Physics 2022-08-10 Kelly M. Hambleton , Federica B. Bianco , Rachel Street , Keaton Bell , David Buckley , Melissa Graham , Nina Hernitschek , Michael B. Lund , Elena Mason , Joshua Pepper , Andrej Prsa , Markus Rabus , Claudia M. Raiteri , Robert Szabo , Paula Szkody , Igor Andreoni , Simone Antoniucci , Barbara Balmaverde , Eric Bellm , Rosaria Bonito , Giuseppe Bono , Maria Teresa Botticella , Enzo Brocato , Katja Bucar Bricman , Enrico Cappellaro , Maria Isabel Carnerero , Ryan Chornock , Riley Clarke , Phil Cowperthwaite , Antonino Cucchiara , Filippo D'Ammando , Kristen C. Dage , Massimo Dall'Ora , James R. A. Davenport , Domitilla de Martino , Giulia de Somma , Marcella Di Criscienzo , Rosanne Di Stefano , Maria Drout , Michele Fabrizio , Giuliana Fiorentino , Poshak Gandhi , Alessia Garofalo , Teresa Giannini , Andreja Gomboc , Laura Greggio , Patrick Hartigan , Markus Hundertmark , Elizabeth Johnson , Michael Johnson , Tomislav Jurkic , Somayeh Khakpash , Silvio Leccia , Xiaolong Li , Davide Magurno , Konstantin Malanchev , Marcella Marconi , Raffaella Margutti , Silvia Marinoni , Nicolas Mauron , Roberto Molinaro , Anais Moller , Marc Moniez , Tatiana Muraveva , Ilaria Musella , Chow-Choong Ngeow , Andrea Pastorello , Vincenzo Petrecca , Silvia Piranomonte , Fabio Ragosta , Andrea Reguitti , Chiara Righi , Vincenzo Ripepi , Liliana Rivera Sandoval , Keivan G. Stassun , Michael Stroh , Giacomo Terreran , Virginia Trimble , Yiannis Tsapras , Sjoert van Velzen , Laura Venuti , Jorick S. Vink

We present a search for transient radio sources on time-scales of seconds to hours at 144 MHz using the LOFAR Two-metre Sky Survey (LoTSS). This search is conducted by examining short time-scale images derived from the LoTSS data. To allow…

High Energy Astrophysical Phenomena · Physics 2023-11-15 Iris de Ruiter , Zachary S. Meyers , Antonia Rowlinson , Timothy W. Shimwell , David Ruhe , Ralph A. M. J. Wijers

The imaging instruments on board INTEGRAL have wide fields of view and high time resolution. Therefore, they are ideal instruments to search for pulsating sources and/or transient events. We are systematically searching for pulsations and…

We present 17 cataclysmic variables (CVs) obtained from the crossmatch between the Sloan Digital Sky Survey (SDSS) and eROSITA Final Equatorial Depth Survey (eFEDS), including 8 known CVs before eFEDS and 9 identified from eFEDS. The…

Solar and Stellar Astrophysics · Physics 2025-11-11 Rui Wang , Wei-Min Gu , Zhi-Xiang Zhang , Tuan Yi , Senyu Qi , Xiao-Jie Xu

Since mid 2014 Gaia mission delivers daily millions of observations of the whole sky. Among them we search for transient events, e.g., supernovae, microlensing events, cataclysmic variables, etc. In my talk I describe the near-real-time…

Instrumentation and Methods for Astrophysics · Physics 2016-01-15 Łukasz Wyrzykowski

Astronomical transients, such as supernovae and other rare stellar explosions, have been instrumental in some of the most significant discoveries in astronomy. New astronomical sky surveys will soon record unprecedented numbers of…

Instrumentation and Methods for Astrophysics · Physics 2023-11-30 Hali Huang , Daniel Muthukrishna , Prajna Nair , Zimi Zhang , Michael Fausnaugh , Torsha Majumder , Ryan J. Foley , George R. Ricker

Fast X-ray Transients (FXTs) are extragalactic bursts of soft X-rays first identified >10 years ago. Since then, nearly 40 events have been discovered, although almost all of these have been recovered from archival Chandra and XMM-Newton…