[vsnet-alert 18514] Re: Symbiotic star H2-34 possibly in an active state

[Brian Skiff]

On Thu, 2015-04-02 at 21:19 +0200, Berto Monard wrote:
> Symbiotic star H2-34 might have reached an eruptive state as shown by recent
> observations done at the Kleinkaroo Observatory, Western Cape, South Africa
> 
> JD / CCD-V
> 
> 2456846.25	18.30
> 2457081.60	16.41
> 2457100.60	16.35
> 2457104.50	16.46
> 2457110.55	16.41
> 
> No V observations of H2-34 were conducted at the KKO between JD 2456386.5 and
> 2457081.6 except the one tabled.
> 
> It is not certain exactly when the active state may have started but a sudden
> brightening of H2-34 occurred in the Ic band on date JD 2456969.3 .
> Earlier observations between 2004 and 2013 (period JD 2453308.2 - 2456386.5)
> showed H2-34 fainter than 18.0 V. 


Just to be clear, this object has coordinates:
17 58 28.05 -28 33 42.0  (J2000, 2MASS).  It was
originally found from its H-alpha emission by Haro,
and thought to be a planetary nebula (as many symbiotics
have been) until the 1980s when it was correctly identified.

It may also be worth noting that there are OGLE I-band
data between JD 2452100 and 2455000.


\Brian