Pith Number

pith:XI32GPNZ

pith:2026:XI32GPNZYRAIRFH2C4GE2MVS5J

not attested not anchored not stored refs pending

On the Possibility of an Extragalactic Positron Annihilation Signal

Hiroki Yoneda, Thomas Siegert

arxiv:2605.21289 v1 · 2026-05-20 · astro-ph.HE · astro-ph.CO · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XI32GPNZYRAIRFH2C4GE2MVS5J}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-21T02:05:27.337285Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ba37a33db9c4408894fa170c4d32b2ea5cb40a6a372f4faea84bbcd6858b469f

Aliases

arxiv: 2605.21289 · arxiv_version: 2605.21289v1 · doi: 10.48550/arxiv.2605.21289 · pith_short_12: XI32GPNZYRAI · pith_short_16: XI32GPNZYRAIRFH2 · pith_short_8: XI32GPNZ

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/XI32GPNZYRAIRFH2C4GE2MVS5J \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: ba37a33db9c4408894fa170c4d32b2ea5cb40a6a372f4faea84bbcd6858b469f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e63979cbc5330ae38aa5adaa14a9251c22c789dc4fd10ed14e30f55e0bc412bf",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2026-05-20T15:23:50Z",
    "title_canon_sha256": "bc2e133337cb9c05029856a8a79157764a858ba23e35fe808f25706b5c2030ff"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.21289",
    "kind": "arxiv",
    "version": 1
  }
}