Supercycle of V1113 Cyg Supercycle of V1113 Cyg (vsnet-chat log)
Thanks to intensive monitoring by visual observers, the cycle lengths of V1113 Cyg seem to have become pretty well established.
Recent outbursts:
JD (+2400000) mag type observers --------------------------------------------------------- 49597-612 13.3 super SNO,POY 49826-830 13.7 super POY,VAN,Wor,BRO 49893-895 13.9 normal VAN,BRO,PIE,POY 49956-959 13.8 normal JEN,VAN,BRO,POY,PIE 50025-036 13.5 super PIE,VAN,BRO,POY 50203-211 13.6 super POY,JEN,VAN 50280-282 13.8 normal PIE,BRO,POY,Kat 50308 14.0 normal? POY (single obs.) 50333-334 13.9 normal POY,BRO 50372-378 13.7 super POY,PIE,VAN,JEN 50420 13.9 normal? POY (single obs.) 50546 14.0 super POY,SNO,JENIntervals between adjacent superoutbursts are 229, 199, 178, 169, 174 d (shortening of supercycle?), average of recent three ones being 170 d.
This system seems to be rather peculiar in that normal outbursts are rather infrequent compared to numerous superoutbursts. Systems with only two (or three) normal outbursts in one supercycle is rarely met in such short supercycle (170 d) SU UMa-type dwarf novae (cf. Warner B. 1995, ApSS, 226, 187). From the viewpoint of the outburst pattern, there may be some resemblance to the recently discovered peculiar SU UMa-type dwarf nova V503 Cyg. Close monitoring to confirm the cycle length of normal outbursts is desirable than ever.
Regards,
Taichi Kato
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