Why Target Sirius? Brightest Star, Closest A-type, Calendar Anchor, and the Dogon Wildcard

Apparent magnitude: -1.46 (brightest)
If you're choosing a target, you pick the
most obvious one. Maximum signal direction.

At 8.6 light-years, Sirius is the nearest
luminous star. Only Alpha Centauri is closer
(4.4 ly) but it's much dimmer.
Sirius = closest bright beacon.

Sirius heliacal rising = Nile flood = agriculture.
The MOST IMPORTANT annual event in Egypt.
Sirius was already sacred for practical reasons
before any interstellar hypothesis is needed.

Even if Sirius has no civilization, it could
serve as a RELAY. A signal aimed at Sirius
continues beyond it to more distant stars.
Sirius is a waypoint, not necessarily the
final destination.

The Dogon knew about invisible Sirius B and
its 50-year orbital period. If this knowledge
came from the Egyptian priestly tradition,
it suggests the Egyptians had information
about the Sirius system beyond naked-eye
observation. HOW they obtained this knowledge
remains genuinely unexplained.

Skeptical explanation: post-1862 European
contact transmitted the information.
But: Griaule documented it in 1931, and the
Dogon claim centuries-old oral tradition.

We don't need Sirius to have a civilization.
We need Sirius to be a RECOGNIZABLE ADDRESS.
Any civilization within 100 light-years that
detects our hydrogen-line signal modulated
with Schumann frequencies would know:
"That signal comes from near the brightest
star in that region of the sky."
Sirius is the LIGHTHOUSE, not the destination.