Radio light curve of the galaxy possibly associated with FRB 150418
MetadataShow full item record
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. © 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
We present observations made with the Australia Telescope Compact Array (ATCA), the Jansky Very Large Array (JVLA) and the Giant Metre-Wave Telescope of the radio source within the galaxy WISE~J071634.59-190039.2, claimed to be host of FRB~150418 by Keane et al. (2016). We have established a common flux density scale between the ATCA and JVLA observations, the main result of which is to increase the flux densities obtained by Keane et al. At a frequency of 5.5 GHz, the source has a mean flux density of 140uJy and is variable on short timescales with a modulation index of 0.36. Statistical analysis of the flux densities shows that the variations seen are consistent with refractive interstellar scintillation of the weak active galactic nucleus at the centre of the galaxy. It may therefore be the case that the FRB and the galaxy are not associated. However, taking into account the rarity of highly variable sources in the radio sky, and our lack of knowledge of the progenitors of FRBs as a class, the association between WISE~J071634.59-190039.2 and FRB~150418 remains a possibility.
Showing items related by title, author, creator and subject.
Lindroos, L.; Knudsen, K.; Fan, L.; Conway, J.; Coppin, K.; Decarli, R.; Drouart, Guillaume; Hodge, J.; Karim, A.; Simpson, J.; Wardlow, J. (2016)We measure the sizes of redshift ~2 star-forming galaxies by stacking data from the Atacama Large Millimeter/submillimeter Array (ALMA). We use a uv-stacking algorithm in combination with model fitting in the uv-domain ...
Massive galaxies on the road to quenching: ALMA observations of powerful high redshift radio galaxiesFalkendal, T.; De Breuck, C.; Lehnert, M.; Drouart, Guillaume; Vernet, J.; Emonts, B.; Lee, M.; Nesvadba, N.; Seymour, Nick; Béthermin, M.; Kolwa, S.; Gullberg, B.; Wylezalek, D. (2019)We present 0.″3 (band 6) and 1.″5 (band 3) ALMA observations of the (sub)millimeter dust continuum emission for 25 radio galaxies at 1 < z < 5.2. Our survey reaches a rms flux density of ∼50 μJy in band 6 (200–250 GHz) ...
Levin, L.; Bailes, M.; Barsdell, B.; Bates, S.; Bhat, Ramesh; Burgay, M.; Burke-Spolaor, S.; Champion, D.J.; Coster, P.; D'Amico, N.; Jameson, A.; Johnston, S; Keith, M.J.; Kramer, M.; Milia, S. Ng, C.; Ng, C.; Possenti, A.; Stappers, B.; Thornton, D.; van Straten, W. (2013)We have used millisecond pulsars (MSPs) from the southern High Time Resolution Universe (HTRU) intermediate latitude survey area to simulate the distribution and total population of MSPs in the Galaxy. Our model makes use ...