KELT-21b: A Hot Jupiter Transiting the Rapidly Rotating Metal-poor Late-A Primary of a Likely Hierarchical Triple System

Johnson, Marshall C. and Rodriguez, Joseph E. and Zhou, George and Gonzales, Erica J. and Cargile, Phillip A. and Crepp, Justin R. and Penev, Kaloyan and Stassun, Keivan G. and Gaudi, B. Scott and Colón, Knicole D. and Stevens, Daniel J. and Strassmeier, Klaus G. and Ilyin, Ilya and Collins, Karen A. and Kielkopf, John F. and Oberst, Thomas E. and Maritch, Luke and Reed, Phillip A. and Gregorio, Joao and Bozza, Valerio and Calchi Novati, Sebastiano and D’Ago, Giuseppe and Scarpetta, Gaetano and Zambelli, Roberto and Latham, David W. and Bieryla, Allyson and Cochran, William D. and Endl, Michael and Tayar, Jamie and Serenelli, Aldo and Silva Aguirre, Victor and Clarke, Seth P. and Martinez, Maria and Spencer, Michelle and Trump, Jason and Joner, Michael D. and Bugg, Adam G. and Hintz, Eric G. and Stephens, Denise C. and Arredondo, Anicia and Benzaid, Anissa and Yazdi, Sormeh and McLeod, Kim K. and Jensen, Eric L. N. and Hancock, Daniel A. and Sorber, Rebecca L. and Kasper, David H. and Jang-Condell, Hannah and Beatty, Thomas G. and Carroll, Thorsten and Eastman, Jason and James, David and Kuhn, Rudolf B. and Labadie-Bartz, Jonathan and Lund, Michael B. and Mallonn, Matthias and Pepper, Joshua and Siverd, Robert J. and Yao, Xinyu and Cohen, David H. and Curtis, Ivan A. and DePoy, D. L. and Fulton, Benjamin J. and Penny, Matthew T. and Relles, Howard and Stockdale, Christopher and Tan, Thiam-Guan and Villanueva, Steven, Jr.

AJ