Outburst of V542 Cyg (summary) YYMMDD(UT) mag observer 980727.260 <142 (L. E. Shaw) 980728.244 <142 (L. E. Shaw) 980801.317 <142 (L. E. Shaw) 980804.008 133 (G. Poyner) 980804.069 133 (G. Poyner) 980804.321 133 (L. E. Shaw) 980804.457 138 (G. Hanson) 980804.923 131 (G. Poyner) 980805.444 143 (G. Hanson) 980806.012 137 (G. Poyner) 980807.037 145 (G. Poyner) 980809.035 <147 (G. Poyner)