[vsnet-alert 26137] Re: RS Ophiuchi eruption confirmed

[Hiroyuki Maehara mira@cetus-net.org via vsnet-alert]

Visual magnitude estimates by VSOLJ members

object         YYYYMMDD(UT)   mag  code
OPHRS          20210809.455    44  Mhh.VSOLJ
OPHRS          20210809.465    44  Mdy.VSOLJ
OPHRS          20210809.469    45  Wny.VSOLJ

Observers / Instruments:
 Mdy: Yutaka Maeda (Nagasaki, Japan) / 3cmB
 Mhh: Hiroyuki Maehara (Okayama, Japan) / 4.2cmB
 Wny: Yasunori Watanabe (Kanagawa, Japan) / 5cmB


On Mon, Aug 09, 2021 at 19:43:32, Hiroyuki Maehara wrote:
> According to Kojima-san, RS Oph was in quiescence on Aug 8.487.
> 
> object         YYYYMMDD(UT)   mag      code
> OPHRS          20210808.487   117c     TKo
> 
> Observer: Tadashi Kojima (Gunma, Japan)
> Instruments: f.l.=300mm lens + Canon EOS 6D
> 
> 
> On Mon, Aug 09, 2021 at 13:48:59, JBD wrote:
> > I would like to propose this spectrum of RS-OPH done despite cloud cover 
> > of more than 25% and done with an alpy-600.
> > 
> > Stacks of 9 images of 500 sec.
> > 
> > Jean-Bruno Desrosiers (JBD)
> > Observatoire du Mont St-Joseph.
> > http://omsj.info | AAVSO: DJED
> > Latitude : N45.26' | Longitude : O71 06'
> > 
> > Le 2021-08-09 à 00:01, Kirill Sokolovsky a écrit :
> > > YYYYMMDD(UT) mag
> > > 20210809.12432  4.77V
> > >
> > > Preliminary photometry with the 0.6m telescope of Michigan State 
> > > University.
> > > Assuming V= 9.34 for the comparison star HD 162215.
> > >
> > > Best wishes,
> > > Kirill Sokolovsky
> > >
> 

-- 
Hiroyuki Maehara
mira at cetus-net.org
http://www.cetus-net.org/