Chandra LETG and XMM-Newton observations of the active flare star binary UV Ceti
Abstract
We have observed UV Ceti during 75 ksec with the Low Energy Transmission Grating Spectrometer onboard the Chandra X-Ray Observatory. Both components are well resolved in the zeroth order image, although their separation (1 ) does not allow to obtain distinct clean spectra. Since the binary orientation is almost parallel to the dispersion axis, emission lines can however be assigned to each component. The positive and negative dispersion spectra further help for the assignment. Light curves from each component of the binary have been constructed and line fluxes measured. Using several line ratios we obtain estimates of the temperature components in each corona. We compare the Chandra data with the 50 ksec-long XMM-Newton observation taken at a different epoch. Simultaneous VLA/XMM-Newton light curves are presented as well.
- Publication:
-
34th COSPAR Scientific Assembly
- Pub Date:
- 2002
- Bibcode:
- 2002cosp...34E2081A