Pith Number

pith:UBFNF2NE

pith:2011:UBFNF2NE6VJUB7Q3X5KC47Z6MG

not attested not anchored not stored refs pending

The Extragalactic Distance Scale without Cepheids IV

Andy Casey, Brian Schmidt, Gary Da Costa, Jeremy Mould, Lachlan Hislop, Michael S. Bessell, Patrick Tisserand, Paul Francis, Sharon Rapoport, Stefan Keller

arxiv:1104.0974 v1 · 2011-04-05 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UBFNF2NE6VJUB7Q3X5KC47Z6MG}

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	2026-05-18T02:02:37.483355Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a04ad2e9a4f55340fe1bbf542e7f3e61bb1b0b6e702ec57bbffe2e02547d94f0

Aliases

arxiv: 1104.0974 · arxiv_version: 1104.0974v1 · doi: 10.48550/arxiv.1104.0974 · pith_short_12: UBFNF2NE6VJU · pith_short_16: UBFNF2NE6VJUB7Q3 · pith_short_8: UBFNF2NE

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/UBFNF2NE6VJUB7Q3X5KC47Z6MG \
  | 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: a04ad2e9a4f55340fe1bbf542e7f3e61bb1b0b6e702ec57bbffe2e02547d94f0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "02aec0a2651101c2c4e013282683873fe0288f4b1c03e998f61bb27fbaf1cf6a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-04-05T23:48:44Z",
    "title_canon_sha256": "4c4e90cd496aa00ce005c19b203d77c05087f3f339992bfaf4d4199da95cc3d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.0974",
    "kind": "arxiv",
    "version": 1
  }
}