Discovering High- z BL Lacs Using Swift/UVOT and SARA Observations with the Dropout Technique. - Sheng, Y.; Imam, K.; Kaur, A.; Ajello, M.; Domínguez, A.; Rau, A.; Cenko, S. B.; Greiner, J.; Hartmann, D. H.; Circiello, A.; Cox, I.; Joffre, S.; et al. (Astrophysical Journal, 2026)