Origin Of The Far Off-Axis GRB171205A

We show that observed properties of the low luminosity GRB171205A and its afterglow, like those of most other low-luminosity gamma ray bursts (LL-GRBs), indicate that it is an ordinary SN-GRB, which was produced by inverse Compton scattering of glory light by a highly relativistic narrowly collimated jet ejected in supernova (SN) explosion and viewed from a far-off axis angle. However, only VLA/VLBI follow-up radio observations of a superluminal displacement of its radio afterglow from its parent supernova, and/or measurements of its late-time X-ray afterglow with the Chandra X-ray observatory will be able to disprove that it was powered by a nascent pulsar in the SN explosion.