[vsnet-alert 17450] Re: Vend558 - new transient or LPV candidate in Cygnus

[Hiroyuki Maehara]

Dear colleagues,

According to the KWS data, the object is likely a Mira-type variable
with a period of ~300 days.

http://kws.cetus-net.org/~maehara/VSdata.py?object=202422%2B3109.4&plot=1

Best regards,
Hiroyuki Maehara

> -----Original Message-----
> From: vsnet-alert-bounces at ooruri.kusastro.kyoto-u.ac.jp [mailto:vsnet-alert-bounces at ooruri.kusastro.kyoto-u.ac.jp]
> On Behalf Of FIDRICH Robert
> Sent: Friday, July 4, 2014 4:04 PM
> To: vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp; vsnet-newvar at ooruri.kusastro.kyoto-u.ac.jp
> Subject: [vsnet-alert 17449] Vend558 - new transient or LPV candidate in Cygnus
> 
> Dear Friends,
> 
> A 13.15TG bright new variable star candidate, Vend558 was found two
> 8x30s images taken on 2.02 July 2014. within the framework of our
> 'Vendégcsillag-kereső' (Guest Star Hunter) programme.
> 
> The new variable star candidate, Vend558 was visible on all eight
> co-added 3x30s images taken on 2.02 July 2014. Nothing was visible at
> the given position on my reference images taken on 08.16 April and 12.15
> April (limit magnitude 14.8 TG) using a Canon EOS 1000D DSLR camera with
> 300mm (zoom) focus telephoto lens.
> 
> Preliminary co-ordinates: 20:24:22.32 +31:09:22.9 (J2000.0) -- only 35'
> from Nova Cygni 2014.
> 
> There is a ~16.5V mag quite red (J-K=1,752) star, UCAC4 606-108140
> (USNOA2 1200-15054013)  close to the given position. Probably this star
> brightened. The preliminary photometry based on Tycho-2 mags, using the
> transient search mode of VaST meausured probably the combined magnitude
> of UCAC4 606-108140 and the ~15.45V bright UCAC4 606-108140 that lies
> only 12" apart from this red star.
> 
> The new variable star candidate Vend558 is the either the brightening of
> a new transient or more likely an LPV.
> 
> I hope we can confirm the discovery tonight. Further photometry and
> precise astrometry is encouraged.
> 
> Discovery and reference images can be found at:
> http://lmv.hu/Vend558
> 
> Clear skies,
> 
> --
> FIDRICH Robert (Fidusz)
> drotlevel/email: fidusz at zpok.hu