Pith Number

pith:65RGJX4O

pith:2002:65RGJX4OFSMRLT5NJVUAMKKVNQ

not attested not anchored not stored refs pending

HI 21cm absorption beyond the epoch of re-ionization

C. Carilli (NRAO), F. Owen (NRAO), N.Y. Gnedin (Colorado)

arxiv:astro-ph/0205169 v2 · 2002-05-13 · astro-ph

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

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.

Cited by

1 paper in Pith

Topological Signatures of Heating and Dark Matter in the 21 cm Forest

Receipt and verification

First computed	2026-05-18T01:07:44.851526Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f76264df8e2c9915cfad4d680629556c26b444dce9fe5bfb3f486bdc6a6050e0

Aliases

arxiv: astro-ph/0205169 · arxiv_version: astro-ph/0205169v2 · doi: 10.48550/arxiv.astro-ph/0205169 · pith_short_12: 65RGJX4OFSMR · pith_short_16: 65RGJX4OFSMRLT5N · pith_short_8: 65RGJX4O

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/65RGJX4OFSMRLT5NJVUAMKKVNQ \
  | 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: f76264df8e2c9915cfad4d680629556c26b444dce9fe5bfb3f486bdc6a6050e0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a16f9124fa5674e0f5b9aa6ae23c6a52d3dd330057593a14f21d38a90db44dc6",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-05-13T00:41:31Z",
    "title_canon_sha256": "806b572800f7bcef52c6d1d79a54c8251992fdbe6a8f261cc03107246e5327a9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0205169",
    "kind": "arxiv",
    "version": 2
  }
}