[vsnet-alert 7156] QZ Ser very rare and bright outburst

[Patrick Schmeer <extpasc@rz.uni-sb.de>]

Visual magnitude estimates by P. Schmeer, Bischmisheim, Germany:
 
QZ Ser = HadV04  (UG:)
Feb.  3.23  UT, [13.8 ;  4.228,  11.9 ;  4.237,  11.8
Sequence:   GSC
Instrument: 203-mm SCT

QZ Ser in
USNO-A2.0: 155655.032 +210712.11 (2000.0) 15.1  16.3
GSC2.2:    155654.989 +210711.37 (2000.0) 15.54 16.41 

This likely dwarf nova is undergoing a bright outburst - its first ever visually
observed one. Before today only one single (photographic) observation was made
of QZ Ser in its bright state (see [vsnet-obs 18349] below).

Time-resolved photometry of QZ Ser during this (possible super)outburst is very
urgently required.

Regards,
Patrick
 
P.S.:
SERQZ 20020203.23  <138 Scp
SERQZ 20020204.228  119 Scp
SERQZ 20020204.237  118 Scp 

---------------------------------------------------------------------------
   * Date: Sat, 12 Dec 1998 15:20:07 +0900 (JST)
   * To: samus@sai.msu.su, vsnet-obs
   * From: Taichi Kato <tkato>
   * Subject: [vsnet-obs 18349] New Haseda variable (HadV04)
   * Cc: vsolj-obs@ooruri.kusastro.kyoto-u.ac.jp
   * Sender: owner-vsnet-obs@kusastro.kyoto-u.ac.jp

New Haseda variable (HadV04)

   Katsumi Haseda (Aichi, Japan) reports the discovery of a new variable
star (HadV04).

HadV04
= USNO1050.07813998 155655.060 +210712.20 (2000.0) 15.3 16.8

Photographic magnitude estimates by VSOLJ members

object         YYMMDD(UT)   mag  code
HadV04         980105.826  <148p  Had.VSOLJ
HadV04         980303.809  148p  Had.VSOLJ
HadV04         980328.753  <142p  Had.VSOLJ
HadV04         980504.708  <145p  Had.VSOLJ
HadV04         980617.547  127p  Had.VSOLJ

   This object may be identical with the following ROSAT WGA source.

155656.6 +210818 (2000.0) 1WGAJ1556.9+2108 0.0254 2.43 0.70 1.82 0.56
 obs=1992.032

   The object was invisible on 15 exposures by Takamizawa.  The small fraction
of bright states, the apparent lack of variablility between three DSS exposures
at different epochs (research by H. Yamaoka) may suggest the dwarf nova nature.
Further monitoring of the object is strongly encouraged.

object         YYMMDD(UT)   mag  code
HadV04         940505.643  <149p  Tmz.VSOLJ
HadV04         940627.510  <149p  Tmz.VSOLJ
HadV04         940925.446  <147p  Tmz.VSOLJ
HadV04         950101.835  <149p  Tmz.VSOLJ
HadV04         950110.774  <149p  Tmz.VSOLJ
HadV04         950423.615  <149p  Tmz.VSOLJ
HadV04         951217.824  <145p  Tmz.VSOLJ
HadV04         951227.823  <149p  Tmz.VSOLJ
HadV04         970509.588  <149p  Tmz.VSOLJ
HadV04         970704.544  <149p  Tmz.VSOLJ
HadV04         970824.502  <149p  Tmz.VSOLJ
HadV04         971020.423  <140p  Tmz.VSOLJ
HadV04         980419.616  <149p  Tmz.VSOLJ
HadV04         980912.461  <145p  Tmz.VSOLJ
HadV04         981010.407  <149p  Tmz.VSOLJ

Observer's code:
  Had: K. Haseda (Aichi, Japan)
       Instruments: 10cm F4.0 twin patrol camera +T-Max400(120)
  Tmz: K.Takamizawa (Saku-machi,Nagano,Japan)
       Inst.: 10cmR F4 twin patrol cameras  T-Max400 120
       Comparison stars mag.:GSC
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