All data processed by USGS/EROS from October 1, 2013 forward will be correctly calibrated within 0.4K at 300K using updated CPF coefficients. Users can correct for the bias error themselves by subtracting 0.036 W/(m2 sr µm) from the top-of-atmosphere radiance product for data products processed between January 1, 2010 and September 30, 2013.
More details about this update can be found at https://www.usgs.gov/landsat-missions/science_L7_Cal_Notices.php.
Source: USGS Landsat Program

Bidding Farewell to Virginia T. Norwood, the Mother of Landsat
Virginia T. Norwood, a founding figure in the field of satellite land imaging, died on Sunday, March 26, 2023, at age 96.