[vsnet 1062] (fwd) call for obs: Southern hemisphere dwarf novae

[Daisaku Nogami <nogami>]

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Date: Tue, 9 Dec 1997 15:56:13 +0000 (GMT)
From: Danny Steeghs <ds10@st-andrews.ac.uk>
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cc: Martin David Still <mds1@st-andrews.ac.uk>,
        David Buckley <dibnob@da.saao.ac.za>, Vik Dhillon <vsd@ast.cam.ac.uk>
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Subject: [vsnet 0] call for obs: Southern hemisphere dwarf novae
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Dear Observers,

Motivated by our recent discovery of tidal spiral structure in the
accretion disc of IP Pegasi (Steeghs, Harlaftis & Horne 1997, MNRAS 290,
L28), we are now attempting to support these claims with further
spectroscopic data of outburst discs to provide indirect spatially
resolved images of the hot accretion discs in CVs. 

We have secured a week of observing time (6-12 january 1998 inclusive) on
the 1.9m and 1m telescopes at SAAO, South africa to study the hot disc of
the nova-like V347 Pup which shows evidence for tidal structure.

We would be very interested in any dwarf novae in outburst during these
nights, visible in the southern sky. The large accretion discs found in
the early outburst phase of dwarf novae are particularly susceptible for
the tidal forces of the companion star. 

As it is crucial to catch the discs as early in outburst as possible we
would like to receive visual magnitude estimates of such dwarf novae. 
We would appreciate a direct e-mail to us (see addresses below) as soon as 
new observations are available to prevent any delays.

Many thanks and good observing!

Danny Steeghs      ds10@st-and.ac.uk
Martin Still	   mds1@st-and.ac.uk
David Buckely      dibnob@da.saao.ac.za
Vik Dhillon        vsd@ast.cam.ac.uk

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