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Photometric Behaviour of the EXors V1118 Orionis and V1143 Orionis

Published online by Cambridge University Press:  12 April 2016

C. Paul ,
P. Kroll  and
T. Lehmann
C. Paul
Affiliation:
Astrophysikalisches Institut und Universitäts-Sternwarte Jena, Schillergäßchen 2, 07740 Jena, Germany
P. Kroll
Affiliation:
Sternwarte Sonneberg, 96515 Sonneberg, Germany
T. Lehmann
Affiliation:
European Southern Observatory, Casilla 19001, Santiago 19, Chile

Extract

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We investigated the long-term photometrical behaviour of the EXors V1118 Ori and V1143 Ori on the basis of the Sonneberg Plate Archive. About 2800 plates were checked for outbursts of these stars. We found several dozens of plates where the stars appeared to be distinctly brighter than the plate limit. To get magnitudes we have scanned those plates and applied a special method of brightness determination which is currently used at Sonneberg Observatory. Because of the small number of plates we were able to extract only crude estimates of some typical time scales of outburst and quiescent phases.

Type
Flares in T Tauri Stars
Information
International Astronomical Union Colloquium , Volume 151: Flares and Flashes , 1995 , pp. 229 - 231
Copyright
Copyright © Springer-Verlag 1995

References

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