GRB 171205A: Hypernova and Newborn Neutron Star

Understand

GRB 171205A is a low-luminosity, long-duration gamma-ray burst (GRB) associated with SN 2017iuk, a broad-line type Ic supernova (SN).

• It is consistent with being formed in the core-collapse of a widely separated binary, which we have called the binary-driven hypernova (BdHN) of type III.
• The core-collapse of the CO star forms a newborn NS ($\nu$NS) and the SN explosion.
• Fallback accretion transfers mass and angular momentum to the $\nu$NS, here assumed to be born non-rotating.