(cba:news) VY Aqr erupts...
jop at astro.columbia.edu
Sun Jun 29 22:04:13 EDT 2008
It seems likely that VY Aqr has just jumped to 10 th magnitude... and
this suggests a probable superoutburst - and possibly the first day of
it, too! This equatorial target is available to everyone, so it's very
attractive for a round-the-world campaign. Train your best firepower on it.
But don't forget GW Lib! The present campaign is going great, and the
documentary record of both the fast pulsations and the "2-hour" signal
is one of our best ever.
At tenth magnitude, you may well choose to use a filter (V is usually
the best choice) since it allows calibration and better treatment of
extinction. It would be desirable - though certainly not necessary - to
attach a third column giving the airmass. This will enable some extra
corrections for differential extinction.
When you first visit the field, select an appropriate comparison star,
and send details to cba-news. Other observers may well choose to use
the same comp; that also allows for somewhat easier splicing of the
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