SETI & Technosignatures

Real-Time Technosignature Strategies With SN 2023ixf

By Keith Cowing
Status Report
June 7, 2023
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Real-Time Technosignature Strategies With SN 2023ixf
Left: Color–magnitude diagram for 108 stars within 0.1 ly of the SETI Ellipsoid defined by SN 2023ixf as of MJD 60094 (black points), with the 100-pc Gaia sample for reference (blue contours). These Ellipsoid-crossing targets already span a range of stellar types. Right: Sky positions for the Ellipsoid-crossing stars (black points), which lay in a ∼3 ◦ region around SN 2023ixf (orange cross). — astro-ph.IM

Several technosignature techniques focus on historic events such as SN 1987A as the basis to search for coordinated signal broadcasts from extraterrestrial agents.

The recently discovered SN 2023ixf in the spiral galaxy M101 is the nearest Type II supernova in over a decade, and will serve as an important benchmark event. Here we review the potential for SN 2023ixf to advance ongoing techonsignature searches, particularly signal-synchronization techniques such as the “SETI Ellipsoid”.

We find that more than 100 stars within 100 pc are already close to intersecting this SETI Ellipsoid, providing numerous targets for real-time monitoring within ~3∘ of SN 2023ixf. We are commencing a radio technosignature monitoring campaign of these targets with the Allen Telescope Array and the Green Bank Telescope.

James R. A. Davenport, Sofia Z. Sheikh, Wael Farah, Andy Nilipour, Bárbara Cabrales, Steve Croft, Alexander W. Pollak, Andrew P. V. Siemion

Comments: 3 Pages, 1 Figure, Submitted to RNAAS. Collaboration welcomed
Subjects: Instrumentation and Methods for Astrophysics (astro-ph.IM); Popular Physics (physics.pop-ph)
Cite as: arXiv:2306.03118 [astro-ph.IM] (or arXiv:2306.03118v1 [astro-ph.IM] for this version)
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Submission history
From: James RA Davenport
[v1] Mon, 5 Jun 2023 16:22:46 UTC (190 KB)

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