2006-03-04

indexing quads of stars, Spitkovsky

[Late post for Friday.]

Anatoly Spitkovsky (SLAC) gave a really nice talk showing that it is possible to compute steady-state and simple evolving models for simple magnetically and rotationally powered astrophysical systems, like pulsars, quasars, magnetars, etc. It was noted that he is on the verge of predicting and/or explaining a huge variety of detailed phenomenology. If this works, he (among others) has opened up a new era in high-energy astrophysics.

On the fifth day of the team meeting, the astrometry.net team talked quad indexes all day: making indices that are dense but heterogeneous on the sky and in code space, the four-dimensional parameter space of all possible scale- and rotation-free quadrangles. At the end of the day, Mierle and Lang got close to having an acceptable error rate and false-positive rate. Roweis and I also discussed larger strategy issues for running, marketing, and funding the project.

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