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[vsnet-obs 1605] DV Dra outburst, continuing?
- Date: Sun, 26 Nov 1995 19:49:37 +0900
- To: vsnet-obs
- From: tkato@kusastro.kyoto-u.ac.jp
- Subject: [vsnet-obs 1605] DV Dra outburst, continuing?
- Sender: owner-vsnet-obs@kusastro.kyoto-u.ac.jp
DV Dra
A 6-min V-band CCD exposure of DV Dra taken at Ouda Station last night
clearly shows DV Dra (WZ Sge-type candidate) siginificantly brighter than
in Downes & Shara (1993) chart. Astrometry using 6 GSC stars (mean residual
0".3) gives 18h17m24s.44 +50o48'16".6 (J2000.0). This position is slightly
different from that given in Downes & Shara (1993), but is in good agreement
with one (18h17m24s.44 +50o48'16".3) obtained by M. Iida from his outburst
CCD image (Iida, private communication). Reanalysis of the Nov. 13 CCD
image (already reported in vsnet-obs #1595, but the measurement was done
for the coordinates by Downes & Shara (1993)) confirms this finding.
continuation from CVC 69 (VVS Belgium, ed. T. Vanmunster)
-----------------------------------------------------------------------
DATE (UT) MAGN MS SEQ OBSERVER REMARKS SOURCE
-----------------------------------------------------------------------
1995 10 30.398 17.8 CU GSC Iida, M. 20-cm+CCD VSNET
1995 10 30.405 17.5 CU GSC Iida, M. 20-cm+CCD VSNET
1995 10 30.411 17.2 CU GSC Iida, M. 20-cm+CCD VSNET
1995 10 31.372 17.8::CU GSC Iida, M. 20-cm+CCD VSNET
1995 11 01.394 17.5 CU GSC Iida, M. 20-cm+CCD VSNET
1995 11 13.388 18.60 V GSC *Ouda team 60-cm+CCD VSNET
1995 11 25.379 18.61 V GSC *Ouda team 60-cm+CCD VSNET
When adopting the POSS magnitude (<21), the present data seem to show that
the outburst may be still on its slow decline, or that the object may be in
"high-state" quiescence. Reexamination of POSS and the candidate by Downes &
Shara (1993) in digitized GSC survey plate would help identifying the nature
of this intriguing outburst. Follow-up observations are, of course, highly
welcomed.
Regards,
Taichi Kato and Ouda team