5. Conclusions

  We have presented one of the most comprehensive multi-wavelength data sets on an active late-type star, both in the breadth of its wavelength coverage and its extent in time. It has resulted in a characterisation of mean conditions in the outer atmosphere of II Peg from the photosphere to the corona for comparison with models and with similar data from previous epochs.

We have detected flares on II Peg in optical broadband photometry, in ultraviolet and optical spectroscopy and in microwaves. One flare, recorded in optical broad band photometry and in ultraviolet spectroscopy, is one of the most energetic observed to date on the star.

We reinforce previous evidence that II Peg is highly variable in virtually all spectral signatures, with the degree of variability increasing to higher excitation.

Acknowledgements

Research at Armagh Observatory is supported by a Grant-in-Aid from the Department of Education of Northern Ireland. This research utilised software and hardware provided by the UK SERC STARLINK computing network. MTE, PJA and ACL acknowledge financial support from Armagh Observatory. MTE, PJA and LMS acknowledge support from the European Economic Community's COMETT programme.