[vsnet-alert 9997] Re: V1040 Cen outburst (super?)

[Berto Monard]

V1040 Cen is struggling to find its steady superoutburst regime. 

Full night observations at CBA Pretoria on 21 and 24 March show a lightcurve with non periodic variations up to 1 magnitude over several hours (24 March). The mean brightness is around magnitude 13.5 and strong flickering is obvious.

Interesting transitional behaviour of a not too well studied ugsu star which was initially known as RXS J1155.4-5641. Will it lead to a superoutburst? 

Perhaps other southern observers might want to join in..

Regards,

Berto Monard
Bronberg Observatory / CBA Pretoria


>>> Taichi Kato <tkato at kusastro.kyoto-u.ac.jp> 21/03/2008 03:50 >>>
V1040 Cen is undergoing an outburst - possibly following a "precursor"
on March 8-10.  See if the present outburst develops into a superoutburst.

  YYYYMMDD(UT)   mag  observer
  20080226.3209 <14.50V  (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397))
  20080229.1933 <14.50V  (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397))
  20080302.2574 <14.50V  (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397))
  20080304.3222 <14.50V  (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397))
  20080307.1736 <14.50V  (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397))
  20080307.506   146  (Rod Stubbings)
  20080308.533   120  (Rod Stubbings)
  20080309.517   125  (Rod Stubbings)
  20080310.2644 <14.50V  (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397))
  20080310.489   134  (Rod Stubbings)
  20080311.462   142  (Rod Stubbings)
  20080312.2652 <14.50V  (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397))
  20080312.485   144  (Rod Stubbings)
  20080315.1494 <14.50V  (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397))
  20080317.2042 <14.50V  (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397))
  20080320.490   123  (Rod Stubbings)