28 U.S.C. § 2245

On the hearing of an application for a writ of habeas corpus to inquire into the legality of the detention of a person pursuant to a judgment the certificate of the judge who presided at the trial resulting in the judgment, setting forth the facts occurring at the trial, shall be admissible in evidence. Copies of the certificate shall be filed with the court in which the application is pending and in the court in which the trial took place.