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

[Tim Crawford]

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