  Anomalies among the daughter nuclei of the extinct short-lived radionuclides
(SLRs) in the calcium-aluminum-rich inclusions (CAIs) indicate that the Solar
System must have been born near a source of the SLRs so that they could be
incorporated before they decayed away. $\gamma$-rays from one such living SLR,
$^{26}$Al, are detected in only a few nearby star-forming regions. Here we
employ multi-wavelength observations to demonstrate that one such region,
Ophiuchus, containing many pre-stellar cores that may serve as analogs for the
emerging Solar System, is inundated with $^{26}$Al from the neighboring
Upper-Scorpius association, and so may provide concrete guidance for how SLR
enrichment proceeded in the Solar System complementary to the meteoritics. We
demonstrate via Bayesian forward modeling drawing on a wide range of
observational and theoretical results that this $^{26}$Al likely 1) arises from
supernova explosions, 2) arises from multiple stars, 3) has enriched the gas
prior to the formation of the cores, and 4) gives rise to a broad distribution
of core enrichment spanning about two orders of magnitude. This means that if
the spread in CAI ages is small, as it is in the Solar System, protoplanetary
disks must suffer a global heating event.
