EF Peg : Rare superoutburst in October
On October 3, E. Muyllaert detected a nare outburst of the SU
UMa-type dwarf nova EF Peg at 11.1mag. EF Peg is a strange SU UMa-type
star in the point of its long cycle of superoutburst with a long orbital
period of near 2 hours, the edge of the "period gap" of CVs
(vsnet-campaign 1180).
The light curve taken by D. Starkey on October 6 showed a probable
superhump, which strongly indicates that it was a genuine superoutburst
(vsnet-campaign-dn 1688).
M. Uemura reported that the time-series data obtained at Kyoto clearly
showed a growth of humps from amplitudes of ~0.07mag to ~0.13mag.
The decline speed became slow with this growth of humps
(vsnet-campaign-dn 1726).
The object started a rapid fading from the superoutburst on October
20 as reported by Pavol A. Dubovsky
(vsnet-campaign-dn 1762).
M. Uemura performed period analysis using the data sets by the VSNET
collaboration team (the Kyoto team, D. Starkey, and J. Pietz) and
reported a period of 0.086509 (24) d. Early phase observations by
D. Starkey showed a short period or double-peak profile of humps. The
later phase data yields a slightly longer period of 0.086686 (34) d
(vsnet-campaign-dn 1771).
After the rapid decline phase, observations by the Kyoto team detected a
possible rebrightening on October 24
(vsnet-campaign-dn 1791).
Other related articles:
vsnet-campaign-dn 1674,
1676,
1678,
1682,
1685,
1690,
1693,
1696,
1701,
1707,
1715,
1722,
1730,
1733,
1736,
1738,
1740,
1748,
1752,
1785,
Preprint:
T. Kato "Photometry of the 1991 Superoutburst of EF Pegasi:
Super-Quasi-Periodic Oscillations with Rapidly Decaying Periods"
ftp://ftp.kusastro.kyoto-u.ac.jp/pub/vsnet/preprints/EF_Peg/
vsnet-preprint 65