Rare outburst of V1028 Cyg

(vsnet-alert 911)

Gene Hanson (USA) reports in [ vsnet-obs 5792] a rare outburst of the SU UMa-type dwarf nova V1028 Cyg.

object         YYMMDD(UT)   mag  code        remarks
CYGV1028       970517.440   142  HSG.AAVSO   OUTBURST
CYGV1028       970517.451   141  HSG.AAVSO   OUTBURST
CYGV1028       970517.469   141  HSG.AAVSO   OUTBURST

The latest outburst of V1028 Cyg occurred on 1996 Aug. 7, when J. Pietz detected the star still rising to maximum. After attaining the maximum of mv=13.5 on Aug. 8, the star started to fade rapidly. Preceded by this short outburst, the star rose up again on Aug. 11, and entered a stage of 11-day lasting superoutbust.

The 1995 July to August superoutburst was quite intensively studied by the Ouda team (Kyoto University), first revealing this object to be an SU UMa-type dwarf nova phenomenologically bridging the usual SU UMa-type and WZ Sge-type dwarf novae. A more detailed discussion is given in Baba et al. (1997, PASJ submitted).

Taichi Kato

Rapid fading

(vsnet-alert 918)

Rapid fading of V1028 Cyg

The SU UMa-type dwarf nova V1028 Cyg has apparently faded rapidly from a rare outburst (vsnet-alert 911, http://www.kusastro.kyoto-u.ac.jp/vsnet/Mail/vsnet-alert/msg00911.html). The present outburst thus seems to be a normal outburst. Close monitoring is still needed to see whether this outburst triggers a superoutburst as in the 1996 August case.

Observations from vsnet-obs:

  YYMMDD(UT)   mag  code
  970517.440   142  HSG
  970517.451   141  HSG
  970517.469   141  HSG
  970518.426   146  HSG
  970518.466   147: HSG
  970519.408  <151  HSG
  970519.465  <156  HSG
  970519.994  <145  POY
Taichi Kato

Preprint! Hajime Baba et al.

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