NO PRECISE LOCALIZATION FOR FRB 150418: CLAIMED RADIO TRANSIENT IS AGN VARIABILITY
نویسندگان
چکیده
منابع مشابه
No Precise Localization for Frb 150418: Claimed Radio Transient Is Agn Variability
Keane et al. have recently claimed to have obtained the first precise localization for a Fast Radio Burst (FRB) thanks to the identification of a contemporaneous fading slow (∼week-timescale) radio transient. They use this localization to pinpoint the FRB to a galaxy at z ≈ 0.49 that exhibits no discernible star formation activity. We argue that the transient is not genuine and that the host ca...
متن کاملOn the Afterglow and Progenitor of Frb 150418
Keane et al. recently detected a fading radio source following FRB 150418, leading to the identification of a putative host galaxy at z = 0.492 ± 0.008. Assuming that the fading source is the afterglow of FRB 150418, I model the afterglow and constrain the isotropic energy of the explosion to be a few 10 erg, comparable to that of a short-duration gamma-ray burst (GRB). The outflow may have a j...
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The localization of fast radio bursts (FRBs) has been hindered by the poor angular resolution of the detection observations and inconclusive identification of transient or variable counterparts. Recently a γ-ray pulse of 380 s duration has been associated with the fast radio burst FRB 131104. We report on radio-continuum imaging observations of the original localization region of the FRB, begin...
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Intranight polarization variability in AGN has not been studied extensively so far. Studying the variability in polarization makes it possibly to distinguish between different emission mechanisms. Thus it can help answering the question if intranight variability in radio-loud and radio-quiet AGN is of the same or of fundamentally different origin. In this paper we investigate intranight polariz...
متن کاملOn Associating Fast Radio Bursts with Afterglows
A radio source that faded over 6 days, with a redshift z ≈ 0.5 host, has been identified by Keane et al. (2016) as the transient afterglow to a Fast Radio Burst (FRB 150418). We report followup radio and optical observations of the afterglow candidate, and find a source that is consistent with an active galactic nucleus (AGN). If the afterglow-candidate is nonetheless a prototypical FRB aftergl...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2016
ISSN: 2041-8213
DOI: 10.3847/2041-8205/821/2/l22