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Observations of the HBL blazar 1RXS J023832.6-311658 were made in 2013, 2015and 2016 with the High Energy Stereoscopic System (H.E.S.S.). An excess of veryhigh energy (VHE: > 100 GeV) gamma rays is clearly observed. The spectralenergy distribution including the VHE spectrum will be presented. This objecthas a hard spectrum at TeV energies, and has a redshift z=0.23. Thesecharacteristics could be suitable for extragalactic magnetic fields for whichthe perspectives with H.E.S.S. will be discussed.

H.E.S.S. observations of very-high-energy emission from 1RXS J023832.6-311658