Rapid Fringe Detection Technique for Discovering Radio Transients in Nasu Drift-scan Data

Autor:	Tsuneaki Daishido, K. Konishi, K. Asuma, T. Nakamizo, S. Kida, Kotaro Niinuma, T. Aoki, T. Tanaka
Rok vydání:	2013
Předmět:	Optics Space and Planetary Science Computer science business.industry Astrophysics::Instrumentation and Methods for Astrophysics Waveform Astronomy and Astrophysics Point (geometry) Transient (oscillation) business Transient signal
Zdroj:	Publications of the Astronomical Society of the Pacific. 125:557-564
ISSN:	1538-3873 0004-6280
DOI:	10.1086/670767
Popis:	This article describes a rapid fringe detection technique for detecting fringes that appear transiently in Nasu observational data. It can quickly and accurately detect fringe waveforms that are not derived from steady sources in the drift-scan data according to constant numerical criteria. A fringe is considered to be a radio transient fringe if the signal-to-noise ratio of each data point is above a threshold for a specific period of time. Such fringes are searched for in the region unaffected by fringes due to steady sources in the observational data, which is determined by using the expectation data generated from an earlier survey catalog. Using the proposed technique, a computer can detect radio transient fringe using numerical criteria, thereby shortening the time required to discover transient signals. Therefore, by reducing the analysis time, we will be able to identify temporal flux variations in radio transients by follow-up observation immediately after detection.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6702f6c23cf7b1b4568aa15fee692521 https://doi.org/10.1086/670767 Zobrazit plný text záznamu