SETI Ellipsoid is a geometric method for prioritizing technosignature observations based on the strategy of obtaining signals synchronized with visible astronomical events.
The exact distances to the nearby stars from Gaia make it possible to limit the time to cross the ellipsoid. Here we explore the usefulness of using the Gaia Catalog of Nearby Stars to select targets for the SN 1987A SETI Ellipsoid, as well as ellipsoids defined by 278 classic new ones. Less than 8% of the stars in the 100 pc sample are inside the SN 1987A SETI Ellipsoid, which means that the vast majority of nearby stars are still viable targets for observation over time.
We find that an average of 734 stars per year in a volume of 100 pc will cross the ellipsoid of SN 1987A, with ~ 10% of these having an uncertainty of distance from Gaia of better than 0.1 lyr.
James RA Davenport, Barbara Cabrales, Sofia Sheikh, Steve Croft, Andrew PV Simion, Daniel Giles, Anne Marie Cody
Comments: 11 pages, 7 figures submitted to AAS Journals Topics: Tools and Methods for Astrophysics (astro-ph.IM) Citation as: arXiv: 2206.04092 [astro-ph.IM] (or arXiv: 2206.04092v1 [astro-ph.IM] for this version) History of submissions by: James RA Davenport [v1] Wednesday, 8 June 2022, 18:00:57 UTC (3 533 KB)
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