Corbet, RobinColey, Joel B.Krimm, Hans A.Pottschmidt, Katja2023-08-292023-08-292018-08-06Corbet, R. H. D., Coley, J. B., Krimm, H. A., and Pottschmidt, K., “Apparent Superorbital Modulation in 4U 1538-52 at Four Times the Orbital Period”, ATel11918, (6 August 2018). https://www.astronomerstelegram.org/?read=11918http://hdl.handle.net/11603/29425en-USThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.X-rayBinaryNeutron StarStarText