Superoutburst of DM Lyr Superoutburst of DM Lyr Dear colleagues,
Our 2.4hr photometry at Ouda Station revealed superhumps in DM Lyr on March 1, proving that the current outburst is a superoutburst. The last superoutburst was caught in 1996 July. This suggests the supercycle of ~230 days or its N-th.
Best regards,
Daisaku Nogami
Further to note on Daisaku Nogami's [vsnet-alert 761].
> Our 2.4hr photometry at Ouda Station revealed superhumps > in DM Lyr on March 1, proving that the current outburst > is a superoutburst. The last superoutburst was caught > in 1996 July. This suggests the supercycle of ~230 days > or its N-th.Previous outbursts of DM Lyr based on reports to VSNET (since 1994 June), together with my own judgements based on outburst durations.
1994 July 4-5 max 14.3 VAN,POY normal
Sep. 6-8 max 14.3 SNO,POY,Ths,Myy,Arm normal
Nov. 1-8 max 13.9 POY,Ths,Arm,SNO,BRO super
1995 Nov. 20-28 max 13.9 PIE,JEN,VAN,POY super
1996 July 7-18 max 13.7 POY,BMM,JSD,JEN,BRO,SQN,Kat,Ths,VAN,Oui,Oud
well-observed super
Oct. 15 max 15.2? Myy (single obs.)
1997 Feb. 26- max 14.3 KNN,POY,HSG,Oud super
Three most recent superoutbursts were seperated almost equally by 230 days as Nogami-san mentioned. The preceding cycle (~380 days) was, however, a bit longer. The typical cycle length of normal outbursts seems to be around 60 days.
Are these values rather normal for an SU UMa star? > Nogami-san
Regards,
Taichi Kato
Return to Powerful Manager's page