Limits on Fast Radio Bursts and other transient sources at 182 MHz using the Murchison Widefield Array-猫眼课题宝

使用 Murchison 宽场阵列对 182 MHz 下的快速无线电爆发和其他瞬态源进行限制

DOI：

10.1093/mnras/stw451

发表时间：

2016

期刊：

Monthly Notices of the Royal Astronomical Society

影响因子：

4.8

通讯作者：

中科院分区：

物理与天体物理2区

文献类型：

作者：

A. Rowlinson;M. Bell;T. Murphy;C. Trott;N. Hurley;S. Johnston;S. Tingay;D. Kaplan;D. Carbone;P. Hancock;L. Feng;A. Offringa;G. Bernardi;J. Bowman;F. Briggs;R. Cappallo;A. Deshpande;B. Gaensler;L. Greenhill;B. Hazelton;M. Johnston;C. Lonsdale;S. McWhirter;D. Mitchell;M. Morales;E. Morgan;D. Oberoi;S. Ord;T. Prabu;N. Shankar;K. Srivani;R. Subrahmanyan;R. Wayth;R. Webster;A. Williams;C. Williams

我们提出了一个调查的瞬态和变量源，时间尺度从28秒到2011年，使用默奇森宽场阵列（MWA）在182 MHz。在探测阈值为0.285 Jy时，没有发现瞬变候选者，这是迄今为止最具约束力的低频调查，并将瞬变表面密度限制为<4.1 × 10−7 deg−2，以考虑最短的时间尺度。在这些频率下，快速射电暴（FRB）的辐射预计可以在最短的时间尺度图像中检测到，而无需对星际或星系际色散进行任何校正。在FRB极限通量密度为7980 Jy时，我们发现在色散测量值<700 pc cm−3时，每天每个天空的FRB率<82。假设一个宇宙学的标准烛光人口，我们的速率限制是一致的FRB率由桑顿等人获得的，如果他们有一个平坦的光谱斜率。最后，我们进行了初步的可变性调查的来源，在该领域的通量密度为10.5 Jy，并确定没有显着的变化，其光变曲线的来源。然而，我们注意到，需要进一步开展大量工作，以充分表征该领域内的短期和低水平变异性。

We present a survey for transient and variable sources, on time-scales from 28 s to ∼1 yr, using the Murchison Widefield Array (MWA) at 182 MHz. Down to a detection threshold of 0.285 Jy, no transient candidates were identified, making this the most constraining low-frequency survey to date and placing a limit on the surface density of transients of <4.1 × 10−7 deg−2 for the shortest time-scale considered. At these frequencies, emission from Fast Radio Bursts (FRBs) is expected to be detectable in the shortest time-scale images without any corrections for interstellar or intergalactic dispersion. At an FRB limiting flux density of 7980 Jy, we find a rate of <82 FRBs per sky per day for dispersion measures <700 pc cm−3. Assuming a cosmological population of standard candles, our rate limits are consistent with the FRB rates obtained by Thornton et al. if they have a flat spectral slope. Finally, we conduct an initial variability survey of sources in the field with flux densities ≳0.5 Jy and identify no sources with significant variability in their light curves. However, we note that substantial further work is required to fully characterize both the short-term and low-level variability within this field.

The LOFAR pilot surveys for pulsars and fast radio transients

DOI： 10.1051/0004-6361/201424495

发表时间： 2014-08

期刊：

Astronomy and Astrophysics

影响因子： 6.5

作者：

T. Coenen;J. V. Leeuwen;J. Hessels;B. Stappers;V. Kondratiev;A. Alexov;R. Breton;A. Bilous;S. Cooper;H. Falcke;H. Falcke;R. Fallows;V. Gajjar;J. Grießmeier;T. Hassall;A. Karastergiou;E. Keane;M. Kramer;M. Kuniyoshi;A. Noutsos;S. Osłowski;S. Osłowski;M. Pilia;M. Serylak;C. Schrijvers;C. Sobey;S. Veen;J. Verbiest;P. Weltevrede;S. Wijnholds;K. Zagkouris;A. V. Amesfoort;James M. Anderson;A. Asgekar;I. Avruch;M. Bell;M. Bentum;G. Bernardi;P. Best;A. Bonafede;F. Breitling;J. Broderick;M. Brüggen;H. Butcher;B. Ciardi;A. Corstanje;A. Deller;S. Duscha;J. Eislöffel;R. Fender;C. Ferrari;W. Frieswijk;M. Garrett;F. Gasperin;E. D. Geus;A. Gunst;J. Hamaker;G. Heald;M. Hoeft;A. Horst;E. Juette;G. Kuper;C. Law;C. Law;G. Mann;R. McFadden;D. McKay-Bukowski;D. McKay-Bukowski;J. McKean;H. Munk;E. Orrú;H. Paas;M. Pandey-Pommier;A. Polatidis;W. Reich;A. Renting;H. Röttgering;A. Rowlinson;A. Scaife;D. Schwarz;J. Sluman;O. Smirnov;J. Swinbank;M. Tagger;Y. Tang;C. Tasse;S. Thoudam;C. Toribio;R. Vermeulen;C. Vocks;R. V. Weeren;O. Wucknitz;P. Zarka;A. Zensus

通讯作者：

LOFAR: The LOw-Frequency ARray

DOI： 10.1051/0004-6361/201220873

发表时间： 2013-08-01

期刊：

ASTRONOMY & ASTROPHYSICS

影响因子： 6.5

作者：

van Haarlem, M. P.;Wise, M. W.;van Zwieten, J.

通讯作者：

van Zwieten, J.

Limits on Fast Radio Bursts and other transient sources at 182 MHz using the Murchison Widefield Array

使用 Murchison 宽场阵列对 182 MHz 下的快速无线电爆发和其他瞬态源进行限制

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