2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/11283A Bayesian likelihood analysis is used to constrain the redshift of the optical transient associated with gamma-ray burst 970508, under the assumption that the absorption at redshift 0.835 is not physically associated with the transient. The maximum-likelihood, expectation value and 95-percent upper limit on the OT redshift are 0.835, 1.3 and 1.9 respectively.6 pages, including 2 figures, submitted to ApJ LettersAstrophysicstext