CRTS J213937.6-023913 outburst MASTER detection. ATEL #7991 MASTER detects an outburst of <a href="http://www.aavso.org/vsx/index.php?view=detail.top&oid=238683">CSS 091119:213938-023913</a> with unfiltered m_OT=14.3 on 2015-09-03 00:21:35.364UT CRTSJ213937.6-023913 20150903.015 143C MAx