[vsnet-alert 12084] Outbursting object in Centaurus

[Sebastián Otero]

This unknown outburster may be bright in V now or not but it has been detected as a very soft X-ray source by the XMM-Newton satellite.
See Joe Patterson's alert on the CBA page:
http://cbastro.org/communications/news/messages/0763.html

It was detected on July 7 at 11 51 13.06 -62 37 29

John Greaves called attention to the ASAS-3 light curve that recorded a slow visual outburst in 2008 (First detection on November 23):
http://www.astrouw.edu.pl/cgi-asas/asas_variable/115111-6237.5,asas3,0,0,500,200

The star peaked at V= 10.4 to slowly fade over the next 9 months down to 12.7 (last detection on August 21, 2009).
A nearby star prevented fainter observations to be useful.

Maybe a slow nova?

If the current X-ray outburst is also a visual outburst, it would mean two peaks in two years, very weird for a nova. So a dwarf nova is more likely although there are no other detections over the 2000-2008 ASAS coverage.

I was trying to prepare a sequence for this field but VizieR is down and it makes the task harder.
I will try again later.

Best wishes,
Sebastian.