[vsnet-alert 5846] V359 Cen outburst

[Taichi Kato <tkato>]

V359 Cen outburst

   Rod Stubbings reports that the dwarf nova V359 Cen is undergoing an
outburst.  The object had been regarded as a possible nova until the
discovery of an outburst in 1999 July by Rod Stubbings.  The next
outburst (the third historical outburst = the last outburst) was
detected by Rod Stubbings on 2000 May 15.

  YYYYMMDD(UT)   mag  observer
  20010330.426  <144  (R. Stubbings)
  20010403.492  <140  (R. Stubbings)
  20010405.499  <138  (R. Stubbings)
  20010412.431  <150  (R. Stubbings)
  20010413.435  <150  (R. Stubbings)
  20010416.417  <144  (R. Stubbings)
  20010417.517  <144  (R. Stubbings)
  20010418.641  <150  (R. Stubbings)
  20010425.542   140  (R. Stubbings)
  20010425.569   140  (R. Stubbings)

   Since the present outburst is most favorably situated among the recent
three outburst, time-resolve photometry is very strongly encouraged.
Spectroscopic confirmation (as a dwarf nova) is also encouraged.

   Attached is [vsnet-alert 4849], issued on the 2000 May outburst:

> V359 Cen outburst, request for observations
> 
>   Rod Stubbings reports that the dwarf nova V359 Cen is undergoing the
> third historical outburst.  The last outburst was in 1999 July (Stubbings).
> According to a private communication on the 1999 outburst reported the
> confirmation of the outburst, and the possible existence of superhumps.
> The object is better located than this time, and we would encourage
> photometric follow-up by southern observers.  This is a timely excelllent
> southern target for VSNET campaign.  Please report the progress of
> observations, and nightly report to vsnet-campaign.
> 
> V359 CEN    20000510.606  <14.8
>             20000515.499   13.8
> 
> On the 1999 outburst:
> 
> [vsnet-alert 3216] Schmeer's comment:
> 
> Hilmar Duerbeck provides in his nova catalogue the following
> information:
> "Discovered by A. Opolski on Franklin-Adams plates. The object is
> visible on 19 plates taken between 1939 April 20 and 27; the
> maximum was probably missed (Lwow Contr 4 (1935))."
> B1950.0 coordinates:
> R.A. 11h55m42.39s  Decl. -41o29'26.0"  (SRC)
>      11h55m54s           -41o29'       (A. Opolski, Lwow Contr 4)
> Range: 13.8p - 21.0j
> 
> J2000.0 coordinates according to DWS97:
> R.A. 11h58m15.29s  Decl. -41o46'07.9"
> 
> Unfortunately V359 Cen is currently not favourably placed for
> observers in the northern hemisphere.
> 
> Regards,
> Patrick
> 
> ---
> [vsnet-alert 3220]
> 
>    According to Munari and Zwitter (A&AS 128, 277), the spectrum of the
> quiescent counterpart, suggested by Duerbeck, was too noisy to draw a
> conclusion on its nature.
> 
> Regards,
> Taichi Kato

Regards,
VSNET Collaboration Team

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