[Aavso-photometry] HS 2331+3905 chart

[Michael Koppelman]

You can use the name HS 2331+3905 in VSP to pull up a chart with B  
and V photometry. (This should be bright enough for even the CV boys  
to use a V filter!)

http://www.aavso.org/observing/charts/vsp/

A sample chart is here:

http://tinyurl.com/yrpdok

M.


On Sep 4, 2007, at 3:05 PM, arne wrote:

> Note that the quiescent magnitude of this WZ Sge type cataclysmic
> variable is about 16.5, so if it is a normal outburst, it should
> reach about 9th magnitude.  Currently it is at V=14.1, so it will
> rapidly rise over the next 24 hours.  Everyone will have a chance
> at it, if it is clear in your neck of the woods (and you are not
> too far south!).  Good luck and clear skies!
>
> There is a BVRI photometric calibration file, as mentioned
> by Uemura-san, at
> ftp://ftp.aavso.org/public/calib/hs2331.dat
> and a BV extracted sequence by Bruce Sumner at
> ftp://ftp.aavso.org/public/calib/sumner/hs2331.seq
>
> It will serve for CCD observers, but once HS2331 exceeds
> 12th magnitude, we will need to extend this sequence to brighter
> stars from Tycho2 for the visual observers.
> Arne
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