Twenty Years of Timing SS433

We present observations of the optical ``moving lines'' in spectra of the Galactic relativistic jet source SS433 spread over a twenty year baseline from 1979 to 1999. The red/blue-shifts of the lines reveal the apparent precession of the jet axis in SS433, and we present a new determination of the precession parameters based on these data. We investigate the amplitude and nature of time- and phase-dependent deviations from the kinematic model for the jet precession, including an upper limit on any precessional period derivative of $\dot P < 5 \times 10^{-5}$. We also dicuss the implications of these results for the origins of the relativistic jets in SS433.Comment: 21 pages, including 9 figures. To appear in the Astrophysical Journa

Sunday Music Series Presents Guilherme Andreas

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Isn\u27t it Romantic? Sacrificing Agency for Romance in \u3ci\u3eThe Chronicles of Prydain\u3c/i\u3e

Addresses the vexed question of Princess Eilonwy’s gesture of giving up magic and immortality to be the wife of Taran and queen of Prydain. Was it a forced choice and a sacrifice of the capable and strong-willed girl’s agency and power, or does it proceed logically from her depiction throughout the series