[Aavso-photometry] Suspect Nova in Vul - Mag Guesstimate - second one

[Tim Crawford]

On the same basis as the previous reported 8.403

I am now showing 8.238 at

2007/08/09/09/48/49

It would appear to be continuing to brighten, at this
point yet.

on my last series now...

night all.... ; - )

Tim  CTX

--- Tim Crawford <tcarchcape at yahoo.com> wrote:

> Using two Tycho2 Stars, with "corrected" V I
> measured
> the V mag at 8.403 at UT 2007/08/09/06/28/55.
> 
> This is just a FYI as the "corrected" Tycho2 comp
> mags
> are "risky" to be using at any time and the
> "correction" may have itself been done in error as
> it
> was accomplished somewhat in haste... 
> 
> I will not report any of tonights obs, or subsequent
> ones,  until Arne has an opportunity to aquire some
> good sequence data of the FOV.
> 
> Never the less, below is the the comp/check star mag
> info.
> 
> Comp Star:
> 
> 19:54:40.66 +20:57:01.5 "corrected" Tycho2 V mag =
> 9.861
> (a bit red with a Bt-Vt of 1.286
> 
> Check Star:
> 
> 19:54:03.14 +20:48:22.1 "corrected" Tycho2 V mag =
> 11.293
> 
> Correction applied: V = Vt+.008-.0988(Bt-Vt)
> 
> Tim Crawford CTX
> Arch Cape Observatory
> 
> 
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