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| Paper: |
ROSAT WFC and XRT Survey Observations of Late-Type Stars |
| Volume: |
154, Cool Stars, Stellar Systems and the Sun: Tenth Cambridge Workshop |
| Page: |
1085 |
| Authors: |
Kellett, Barry J.; Tsikoudi, Vassiliki |
| Abstract: |
We have performed a systematic search of the ROSAT PSPC survey observations for X-ray flares of late-type main sequence stars. Our sample consists of 14 stars, mostly from flare star lists. A total of 31 flares was detected. We combined the PSPC data with the simultaneous EUV data from the Wide Field Camera. We find a good correlation between the X-ray and WFC flares for LARGE events, but there are smaller events in both bandpasses that do not show significant flux in the other waveband. We find that the X-ray flare luminosity correlates very well with the EUV flare luminosity (for the sub-set of ``common'' flares), and this relationship follows the same trend as the underlying quiescent luminosities in the two bands. We also checked the X-ray data for quiescent variability and found that this was a common feature of the data. This confirms our earlier result of significant EUV quiescent variability. |
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