3 papers
astro-ph.IM2026
A Response to paper Critical Evaluation of Studies Alleging Evidence for Technosignatures in the POSS1-E Photographic Plates by Watters et al. (2026)
Beatriz Villarroel, Alina Streblyanska, Stephen Bruehl +1
We respond to the critique by Watters et al. (2026) of the statistical analyses in Villarroel et al. (2025) and Bruehl & Villarroel (2025). We argue that the critique conflates obj…
astro-ph.IM2026
Machine Learning Supports Existence of Previously Unrecognized Transient Astronomical Phenomena in Historical Observatory Images
Stephen Bruehl, Brian Doherty, Alina Streblyanska +1
Transient, star-like point sources that appear and vanish over short timescales are described in astronomical images prior to launch of Sputnik. We have reported that transient num…
astro-ph.IM2025
A Cost-Effective Search for Extraterrestrial Probes in the Solar System
Beatriz Villarroel, Wesley A. Watters, Alina Streblyanska +3
For centuries, astronomers have discussed the possibility of inhabited worlds - from Herschel's 18th-century observations suggesting Mars may host life, to the systematic search fo…