Landing page for project RSM01

Sebastian et al. published a paper entitled: "Discovery of a new, 2.2 Mpc Giant Radio Galaxy at a redshift of 0.57" (MNRAS in press, arXiv:1710.06182). They report the results of multifrequency observations of a GRG centred at J084408+462744. One of the findings of their observing campaign with GMRT is that the core of that GRG has surprisingly steep spectrum - alpha=0.85. This is a hint that the object in the centre of the GRG is not a core in a usual sense but a compact steep spectrum source (CSS) and as such it may have e.g. double-lobed morphology. If this happens to be the case then the GRG as a whole is a triple-double source. Very few such sources are known as yet, so the potential discovery of a new example would be scientifically valuable. However, the above-mentioned CSS source is weak -- according to FIRST it has only 1.5 mJy at L-band. Given that its spectral index calculated for GMRT frequencies continues to be 0.85 between L- and C-band, the flux density of only 0.45 mJy is expected at C-band. Thus, before we submit a regular proposal, we would like to check whether CSS J084408+462744 is compact enough and strong enough for a full-blown, C-band EVN observation to be justified.

This data is part of the archive of VLBI data maintained by JIVE on behalf of the EVN, a network of radio telescopes located primarily in Europe and Asia, with additional antennas in South Africa. The EVN archive itself has the DOI https://doi.org/10.17616/R3Z197