Academic Journal
RFI flagging implications for short-duration transients
| العنوان: | RFI flagging implications for short-duration transients |
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| المؤلفون: | Cendes, Y., Prasad, P., Rowlinson, A., Wijers, R., Swinbank, J., Law, C., van Der Horst, A., Carbone, D., Broderick, J.W., Staley, T., D, Stewart, A.J., Huizinga, F., Molenaar, G., Alexov, A., Bell, M., E, Coenen, T., Corbel, Stéphane, Eisloffel, J., Fender, R., Griessmeier, Jean-Mathias, Jonker, P., Kramer, M., Kuniyoshi, M., Pietka, M., Stappers, B., Wise, M., Zarka, P. |
| المساهمون: | Astronomical Institute Anton Pannekoek (AI PANNEKOEK), University of Amsterdam Amsterdam = Universiteit van Amsterdam (UvA), CSIRO Astronomy and Space Science, Commonwealth Scientific and Industrial Research Organisation Australia (CSIRO), Netherlands Institute for Radio Astronomy (ASTRON), Oxford Astrophysics, University of Oxford, Sydney Institute for Astronomy (SIfA), The University of Sydney, Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Unité Scientifique de la Station de Nançay (USN), Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris Sciences et Lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), Thüringer Landessternwarte Tautenburg (TLS), Department of Physics Oxford, Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales Paris (CNES), Institute for Mathematics, Astrophysics and Particle Physics (IMAPP), Radboud University Nijmegen, Max-Planck-Institut für Radioastronomie (MPIFR), Jodrell Bank Centre for Astrophysics (JBCA), University of Manchester Manchester, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), ANR-10-LABX-0023,UnivEarthS,Earth - Planets - Universe: observation, modeling, transfer(2010), ANR-11-IDEX-0005,USPC,Université Sorbonne Paris Cité(2011) |
| المصدر: | ISSN: 2213-1337 ; Astronomy and Computing ; https://insu.hal.science/insu-01778969 ; Astronomy and Computing, 2018, 23, pp.103-114. ⟨10.1016/j.ascom.2018.04.001⟩. |
| بيانات النشر: | HAL CCSD Elsevier |
| سنة النشر: | 2018 |
| المجموعة: | Aix-Marseille Université: HAL |
| مصطلحات موضوعية: | transient rate limits, Automated flagging, Radio Frequency Interference, RFI, radio transients, transient rates, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM] |
| الوصف: | International audience ; 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 Frequency Interference (RFI) can show up in the data stream in similar ways to such transients, and thus the normal pre-treatment of filtering RFI (flagging) may also remove astrophysical transients from the data stream before imaging. In this paper we investigate how standard flagging affects the detectability of such transients by examining the case of transient detection in an observing mode used for Low Frequency Array (LOFAR; van Haarlem et al., 2013) surveys. We quantify the fluence range of transients that would be detected, and the reduction of their SNR due to partial flagging. We find that transients with a duration close to the integration sampling time, as well as bright transients with durations on the order of tens of seconds, are completely flagged. For longer transients on the order of several tens of seconds to minutes, the flagging effects are not as severe, although part of the signal is lost. For these transients, we present a modified flagging strategy which mitigates the effect of flagging on transient signals. We also present a script which uses the differences between the two strategies, and known differences between transient RFI and astrophysical transients, to notify the observer when a potential transient is in the data stream. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/arxiv/1804.04708; ARXIV: 1804.04708; BIBCODE: 2018A&C.23.103C |
| DOI: | 10.1016/j.ascom.2018.04.001 |
| الاتاحة: | https://insu.hal.science/insu-01778969 https://insu.hal.science/insu-01778969v1/document https://insu.hal.science/insu-01778969v1/file/1-s2.0-S2213133716300968-main-1.pdf https://doi.org/10.1016/j.ascom.2018.04.001 |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.20303B3F |
| قاعدة البيانات: | BASE |
| DOI: | 10.1016/j.ascom.2018.04.001 |
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