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Summary: 1
A MULTIWAVELENGTH STUDY OF RZ CASSIOPEIAE: THE XMM-NEWTON/VLA
CAMPAIGN
M. Audard1
, J. R. Donisan1
, and M. G¨udel2
1
Columbia Astrophysics Laboratory, Columbia University, Mail code 5247, 550 West 120th Street, New York, NY 10027, USA
2
Paul Scherrer Institut, Villigen & W¨urenlingen, 5232 Villigen PSI, Switzerland
Abstract
XMM-Newton and the VLA simultaneously observed
the eclipsing Algol-type binary RZ Cassiopeiae in August
2003. The secondary eclipse (K3 IV companion behind the
A3 V primary) was placed at the center of the 15-hour ra-
dio campaign, while the X-ray satellite monitored a full
1.2-day orbital period. We present results of the X-ray
and radio campaigns. The X-ray light curve shows signif-
icant modulation probably related to rotational modula-
tion and active region evolution, and even small flares.
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