X-ray and UV emission of the ultrashort-period, low-mass eclipsing binary system BX Trianguli V. Perdelwitz, S. Czesla, J. Robrade, T. Pribulla and J. H. M. M. Schmitt A&A, 619 (2018) A138 Published online: 16 November 2018 DOI: 10.1051/0004-6361/201834116