Pith Number

pith:P2LEF4LN

pith:2015:P2LEF4LNFG6X5XXSGQKQ5NCLAW

not attested not anchored not stored refs pending

A Free-Form mass model of the Hubble Frontier Fields Cluster AS1063 (RXC J2248.7-4431) with over one hundred constraints

Daniel Lam, Holland Ford, Jeremy Lim, Jess Wong, Jose M. Diego, Joseph Silk, Tom Broadhurst, Wei Zheng

arxiv:1512.07916 v2 · 2015-12-24 · astro-ph.CO · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{P2LEF4LNFG6X5XXSGQKQ5NCLAW}

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	2026-05-18T01:16:15.017197Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7e9642f16d29bd7edef234150eb44b05b48b4c7acbf0e570774969b5deb75767

Aliases

arxiv: 1512.07916 · arxiv_version: 1512.07916v2 · doi: 10.48550/arxiv.1512.07916 · pith_short_12: P2LEF4LNFG6X · pith_short_16: P2LEF4LNFG6X5XXS · pith_short_8: P2LEF4LN

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/P2LEF4LNFG6X5XXSGQKQ5NCLAW \
  | 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: 7e9642f16d29bd7edef234150eb44b05b48b4c7acbf0e570774969b5deb75767

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9dae516d1d8eebd24ac0307575523d22f28b31e7dfe8816a307ba8d8797d818b",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2015-12-24T21:00:03Z",
    "title_canon_sha256": "834cbcd1842857f89160017710bf8f14a2bac35c3d41d9784ea0663af1abad64"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.07916",
    "kind": "arxiv",
    "version": 2
  }
}