Superoutburst of DH Aql

(vsnet-alert 875)

The SU UMa-type dwarf nova DH Aql is undergoing a bright outburst as reported by P. Schmeer in [ vsnet-alert 872] and by G. Hanson in [vsnet-obs 5685].

  YYMMDD(UT)   mag  code
  970503.099   124  Scp
  970503.424   124  HSG

The reported brightness seems to surpass almost all of the previously outbursts, including the 1994 September superoutburst and 1995 July (possibly super-)outburst. Records:

  940921.805   125  SNO
  940923.832   128  VAN
  940925.542   132: Myy

  950716.933   127  VAN
  950719.956   131  VAN
  950720.925   135  VAN

The first ever detection of superhumps was made during the 1994 September outburst by the Ouda team (Nogami and Kato, IBVS 4227), who reported a superhump period of 0.0805 +/- 0.003 day. Observations during the present outburst of better visibility are strongly recommended.

Taichi Kato

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