Pith Number

pith:NCU75NPB

pith:2016:NCU75NPBWIGEUYGL6RS4WUWIP5

not attested not anchored not stored refs pending

Precise Measurement of the Reionization Optical Depth from The Global 21-cm Signal Accounting for Cosmic Heating

Abraham Loeb (Harvard University), Anastasia Fialkov

arxiv:1601.03058 v2 · 2016-01-12 · astro-ph.CO

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.

Receipt and verification

First computed	2026-05-18T01:16:14.769408Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

68a9feb5e1b20c4a60cbf465cb52c87f4b7ee5ebaf7caa28351096ec58e17162

Aliases

arxiv: 1601.03058 · arxiv_version: 1601.03058v2 · doi: 10.48550/arxiv.1601.03058 · pith_short_12: NCU75NPBWIGE · pith_short_16: NCU75NPBWIGEUYGL · pith_short_8: NCU75NPB

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/NCU75NPBWIGEUYGL6RS4WUWIP5 \
  | 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: 68a9feb5e1b20c4a60cbf465cb52c87f4b7ee5ebaf7caa28351096ec58e17162

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "98e4039df3dd1d4fcbc43c29c071fbfb2cbff151d372c3e09e176f538898c561",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2016-01-12T21:08:55Z",
    "title_canon_sha256": "0fd6700f9a674bd1455a50830a7dbbf5548b61430c11427ea1f5f0329f2c633c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1601.03058",
    "kind": "arxiv",
    "version": 2
  }
}