Pith Number

pith:7QOSPOFE

pith:2004:7QOSPOFEUYNA7C32CK7CTZEKRK

not attested not anchored not stored refs pending

Probing the Dark Ages with the Square Kilometer Array

C. Carilli (NRAO), F. Briggs (ATNF), H. Falcke (ASTRON), M. Jarvis, S. Furlanetto (Caltech), S. Rawlings (Oxford)

arxiv:astro-ph/0409312 v2 · 2004-09-13 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7QOSPOFEUYNA7C32CK7CTZEKRK}

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	2026-07-04T16:44:41.336734Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc1d27b8a4a61a0f8b7a12be29e48a8a88e315ba39bbe9fa25e12e45e33e302f

Aliases

arxiv: astro-ph/0409312 · arxiv_version: astro-ph/0409312v2 · doi: 10.48550/arxiv.astro-ph/0409312 · pith_short_12: 7QOSPOFEUYNA · pith_short_16: 7QOSPOFEUYNA7C32 · pith_short_8: 7QOSPOFE

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/7QOSPOFEUYNA7C32CK7CTZEKRK \
  | 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: fc1d27b8a4a61a0f8b7a12be29e48a8a88e315ba39bbe9fa25e12e45e33e302f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c53f8fa1c571b9498ec099fc8e55f3359ebccf7560a562cd4d87c0f4788bff2e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-09-13T22:32:17Z",
    "title_canon_sha256": "ed9ac32cb65a07d3c9e1948526d183d467e2bea9d46255fd5e488ab3ddd12a8a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0409312",
    "kind": "arxiv",
    "version": 2
  }
}