V660 Her superoutburst As reported by Jochen Pietz (vsnet-obs 28008), the SU UMa-type dwarf nova V660 Her is undergoing a superoutburst. V660 Her 2000-06-02.000 14.34C comp star GSC 2076.2118 V660 Her 2000-06-02.029 14.40C CCD frames obtained in the following night show two humps (amplitude ~0.2mag, period ~0.073 days) Observations are strongly encouraged in this favorable season. The object has been on the VSNET target list since 1998. Please report your progress of observations and reports to vsnet-campaign. Regards, Taichi Kato VSNET Collaboration team Previous information: ============================================================================= [vsnet 1481] V660 Her According to the recent article by Spogli et al. (As. Ap. Sup. 130, 485), V660 Her was observed to undergo a bright (V ~14.3) outburst (1995 Jul. 6). The duration of the outburst was more than 10 days, showing a linear decline resembling those of superoutbursts. Although this star has not been monitored intensively, it surely deserves more attention as a good SU UMa-type candidate. Regards, Taichi Kato ============================================================================= [vsnet-alert 2828] Dear colleagues, Outburst of V660 Her: V660 Her 19990405.023 14.2 Confirmation needed. Regards, Timo Kinnunen ============================================================================= [vsnet-alert 2832] Jochen Pietz Outburst of V660 Her in Nov 1998 Unfiltered ST-6 images 1998-11-21.767 14.9 1998-11-22.724 14.8 1998-11-28.717 <16.3 Comparison star GSC2076 1990 (V=11.23mag Tycho) ============================================================================= [vsnet-alert 3162] Jochen Pietz The first-ever detection of superhumps in the suspected SU UMa star V660 Her! V660 Her ----------- CCD photometry of V660 Her (1999-06-18.98UT to 19.07 & 1999-06-19.96 to 20.08) of the current outburst shows humps with an amplitude of ~0.2mag. First analysis suggests a period of ~0.075days. A folded lightcurve of the two observing runs can be found at http://home.t-online.de/home/Jochen.Pietz/v660her.gif Due to the limited time coverage other periods (eg 0.081days) cannot be excluded. V660 Her 1999-06-18.99 14.5C comp star GSC 2076.2118 V660 Her 1999-06-19.96 14.8C V660 Her 1999-06-26.03 15.7C