Outburst of GX Cas

In vsnet-obs 2065, Lasse T. Jensen reports on a bright outburst of an SU UMa-type dwarf nova, GX Cas. He estimated the variable at mv=13.6 on Feb. 7.737 UT. G. Poyner confirmed this outburst on 8.765 UT, when the object was rapidly fading at mv=14.4. The present outburst of GX Cas seems to be a normal outburst.

Previous articles concerning GX Cas include:

GX Cas outburst (J. Bortle)

(vsnet-alert 249, 1995 Oct. 16)

Be advised that, although I have seen no mention of it on VSNET, the dwarf nova 0043+56b GX Cas has been in outburst for nearly a week. The following observations are by the undersigned:

         Oct.  2.05  UT     <15.2     (AAVSO Sequence)
               3.06         <15.0
              10.0160        13.3
              11.9938        13.3
              13.0111        13.3
              14.0347        13.6

John E. Bortle (AAVSO)

Note on GX Cas (T. Kato)

(vsnet-alert 250, 1995 Oct. 17)

GX Cas

Concerning the present outburst of GX Cas reported by J. Bortle (vsnet-alert 249), I hope the following information posted to vsnet on 1994 Aug. 21 would be of any help in scheduling observations.

Subject: GX Cas : a new SU UMa star

Dear vsnet colleages,

CCD photometry of GX Cas at Ouda Station has revealed that this star belongs to a new member of SU UMa-type dwarf novae. The outburst of this star has been notified from T. Vanmunster (VVS-Belgium). Clear superhumps were detected from tonight's observations. The superhump period is something around 0.095 day(!), which is the longest one below the period gap, or even in the period gap. The amplitude of superhumps was 0.28 mag in V. The first superhump maximum occurred on Aug. 20.663 UT. The complete analysis is now under way, so the final result may differ somewhat from this. (...)

Taichi Kato

Later observations have refined the superhump period of this dwarf nova to be 0.093 day, which is clearly the longest (or even in the period gap!) among SU UMa stars except TU Men. The 1994 Aug. superoutburst came to an end on Aug. 27.

Taichi Kato

VSNET charts

get PostScript

Light curve of the 1994 superoutburst

Light curve obtained at Ouda Station


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