Detection of optical P-Cygni profiles in Swift J1858.6-0814. Munoz-Darias, T. ; Jimenez-Ibarra, F. ; Armas Padilla, M. ; Casares, J. ; Cuneo, V. ; Panizo-Espinar, G. ; Sanchez-Sierras, J. ; Torres, M. A. P. Abstract Publication: The Astronomer's Telegram Pub Date: 2019 Bibcode: 2019ATel12881....1M