TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3848 SUBJECT: Correction to Eiso calculation in GCN 3835 on GRB 050820A DATE: 05/08/21 22:35:20 GMT FROM: Takanori Sakamoto at NASA/GSFC T. Sakamoto (GSFC/NRC) on behalf of the Swift-BAT team: The isotropic-equivalent energy of GRB050820A reported in GCN 3835 is not correctly represented. We want to correct the last paragraph of GCN 3835 to the following. "The isotropic-equivalent energy using the redshift of 2.612 (Prochaska, et al. GCN 3833) is (2.2 +- 0.13) x 10^52 ergs in the 54-542 keV band in the GRB rest frame (15-150 keV band in the observer's frame) using a simple power-law model." We would like to thank Dr. Arnon Dar for reporting about this mistake.