Pith Number

pith:2B2LWUSQ

pith:2002:2B2LWUSQLH4ZHMQ467I7Z5KNAQ

not attested not anchored not stored refs pending

Detection of He II reionization in the SDSS quasar sample

J. Frieman, J. Schaye, M. Bernardi, M. Subbarao, P. Hewett, R. K. Sheth, T. Theuns

arxiv:astro-ph/0206319 v2 · 2002-06-18 · 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{2B2LWUSQLH4ZHMQ467I7Z5KNAQ}

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	2026-07-04T16:30:14.367700Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d074bb525059f993b21cf7d1fcf54d04044fbf0c8d05002049d576259f3665a1

Aliases

arxiv: astro-ph/0206319 · arxiv_version: astro-ph/0206319v2 · doi: 10.48550/arxiv.astro-ph/0206319 · pith_short_12: 2B2LWUSQLH4Z · pith_short_16: 2B2LWUSQLH4ZHMQ4 · pith_short_8: 2B2LWUSQ

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/2B2LWUSQLH4ZHMQ467I7Z5KNAQ \
  | 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: d074bb525059f993b21cf7d1fcf54d04044fbf0c8d05002049d576259f3665a1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7267e9b051e37c4a0bcd4afce37cbb411e0d2387c119bd8e9d86f1616822568f",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-06-18T20:14:44Z",
    "title_canon_sha256": "43f17b1706ba5eaa93f0b5ad57a85e633ecbe1e183bde60a9757b579d6f31dd0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0206319",
    "kind": "arxiv",
    "version": 2
  }
}