[vsnet-alert 11857] Re: V407 Cyg outburst

[Hiroyuki Maehara]

 V407 Cyg is undergoing a bright (V=7.9) outburst! 
Follow-up observations are encouraged.

Visual magnitude estimates by VSOLJ members

object         YYYYMMDD(UT)   mag  code
CYGV407        20100311.836    74  Hsk.VSOLJ
CYGV407        20100311.864    79  Mhh.VSOLJ

Observers 
  Hsk: Kenji Hirosawa (Aichi, Japan)
  Mhh: Hiroyuki Maehara (Kyoto, Japan)

CCD magnitude estimates by VSOLJ members

object         YYYYMMDD(UT)   mag      code
CYGV407        20100311.85242 5.31Ic   Mhh.VSOLJ
CYGV407        20100311.85255 6.68Rc   Mhh.VSOLJ
CYGV407        20100311.85273 7.94V    Mhh.VSOLJ
CYGV407        20100311.85308 8.97B    Mhh.VSOLJ
CYGV407        20100311.85664 8.00y    Mhh.VSOLJ

Observer: Hiroyuki Maehara (Kyoto, Japan)
Instruments: 25cmL + ST-7XME + Bessell B,V,Rc,Ic, Stromgren y filter


On Thu, Mar 11, 2010 at 10:32:31AM +0900, Hiroyuki Maehara wrote:
>  According to K. Nishiyama and F. Kabashima, the symbiotic mira
> V407 Cyg is undergoing an outburst. Follow-up observations are
> encouraged.
> 
> CYGV407    20091103.465     96C
> CYGV407    20091203.428     92C
> CYGV407    20100103.413     92C
> CYGV407    20100117.409     93C
> CYGV407    20100222.834     96C
> CYGV407    20100223.817     97C
> CYGV407    20100307.859     98C
> CYGV407    20100310.797     74C
> 
> Instruments: 105mm lens + unfiltered CCD
> 
> CYGV407    20100310.813     68C
> CYGV407    20100310.814     69C
> 
> Instruments: 40cm Telescope + unfiltered CCD
> Observers: K. Nishiyama and F. Kabashima