Probing the Multi-Wavelength Nature of Stellar Flares

The Extreme Ultraviolet Explorer has been instrumental in advancing our understanding of flares on late-type stars. Its long observations of coronal sources for > 100 ks are perfectly matched for studying flaring variability on active binary systems, whose flaring time scales can last for tens of hours. This ability makes EUVE an ideal companion for multi-wavelength observations of flares, as it can place the shorter observations of other satellites and telescopes in perspective of the coronal variability. For example, EUVE recently participated in a campaign to observe the RS CVn binary HR 1099 (V711 Tau) during a calibration observation with the Chandra X-ray Observatory, with accompanying high-resolution UV coverage from HST/STIS and radio coverage from the VLA. I will discuss the results of this campaign as well as earlier multi-wavelength observations involving EUVE and other satellites such as ASCA, RXTE, and BeppoSAX of flaring variability on active binary systems. RAO acknowledges funding from a NASA GSRP fellowship, grant number NGT5-50241. AB and TRA acknowledge funding from NASA grant NAG5-3226 and JLL acknowledges support from NASA through grants S-56500-D and H-04630D.