Systematics and Biases in Observations of Supernovae Associated with Gamma-Ray Bursts

Detection, observation and description of supernovae associated with gamma-ray bursts are currently topical tasks in the field of transient phenomena. From the moment an assumption is made about the relationship of the gamma-ray burst with a supernova to obtaining the parameters of the latter, many steps must be taken, and each of them introduces uncertainty and systematics into the final result. In this paper, we analyze the selective effects that arise during the determination of the parameters of supernovae associated with gamma-ray bursts and discuss possible options for taking them into account and minimizing them.