VLBI observations of SN2011dh: imaging of the youngest radio supernova

Details VLBI observations of SN2011dh: imaging of the youngest radio supernova VLBI observations of SN2011dh: imaging of the youngest radio supernova

2011-10-24

arxiv.org/abs/1110.5311v3

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

Letter. Accepted in A&A

Scientific paper

We report on the VLBI detection of supernova SN2011dh at 22GHz using a subset of the EVN array. The observations took place 14 days after the discovery of the supernova, thus resulting in a VLBI image of the youngest radio-loud supernova ever. We provide revised coordinates for the supernova with milli-arcsecond precision, linked to the ICRF. The recovered flux density is a factor 2 below the EVLA flux density reported by other authors at the same frequency and epoch of our observations. This discrepancy could be due to extended emission detected with the EVLA or to calibration problems in the VLBI and/or EVLA observations.

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