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Context: Recent XMM-Newton observations have revealed that IRAS 17020+4544 isa very unusual example of black hole wind-produced feedback by a moderatelyluminous AGN in a spiral galaxy. Aims: Since the source is known for being aradio emitter, we investigated about the presence and the properties of anon-thermal component. Methods: We observed IRAS 17020+4544 with the Very LongBaseline Array at 5, 8, 15, and 24 GHz within a month of the 2014 XMM-Newtonobservations. We further analysed archival data taken in 2000 and 2012.Results: We detect the source at 5 GHz and on short baselines at 8 GHz. At 15and 24 GHz, the source is below our baseline sensitivity for fringe fitting,indicating the lack of prominent compact features. The morphology is that of anasymmetric double, with significant diffuse emission. The spectrum between 5and 8 GHz is rather steep ($S(\nu)\sim\nu^{-(1.0\pm0.2)}$). Our re-analysis ofthe archival data at 5 and 8 GHz provides results consistent with the newobservations, suggesting that flux density and structural variability are notimportant in this source. We put a limit on the separation speed between themain components of $<0.06c$. Conclusions: IRAS 17020+4544 shows interestingfeatures of several classes of objects: its properties are typical of compactsteep spectrum sources, low power compact sources, radio-emitting narrow lineSeyfert 1 galaxies. However, it can not be classified in any of thesecategories, remaining so far a one-of-a-kind object.

Coexistence of a non thermal jet and a complex ultra fast X-ray outflow in a moderately luminous AGN