Pith Number

pith:MKM6VITI

pith:2011:MKM6VITIYJCUG47D3BZNBMQSEK

not attested not anchored not stored refs pending

The First Three Rungs of the Cosmological Distance Ladder

Agnes Bischoff-Kim, Erika DeBenedictis, Gil Tabak, Jeremy Steeger, Kanika Pasricha, Kevin Krisciunas

arxiv:1109.4957 v2 · 2011-09-22 · astro-ph.IM · physics.ed-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{MKM6VITIYJCUG47D3BZNBMQSEK}

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	2026-05-18T02:00:26.302750Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6299eaa268c2454373e3d872d0b212229dc0a02c633631ad4a6889827f22ed74

Aliases

arxiv: 1109.4957 · arxiv_version: 1109.4957v2 · doi: 10.48550/arxiv.1109.4957 · pith_short_12: MKM6VITIYJCU · pith_short_16: MKM6VITIYJCUG47D · pith_short_8: MKM6VITI

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/MKM6VITIYJCUG47D3BZNBMQSEK \
  | 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: 6299eaa268c2454373e3d872d0b212229dc0a02c633631ad4a6889827f22ed74

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "660681fbe660f6533024a89a20287e1cd4c22abd246044aceb5b765e6d058d16",
    "cross_cats_sorted": [
      "physics.ed-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2011-09-22T21:34:33Z",
    "title_canon_sha256": "4b433fe91de58920a3c535aedf13db633ae219b154c42e4c05ffdf7379125841"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.4957",
    "kind": "arxiv",
    "version": 2
  }
}