Pith Number

pith:HHNKEHZM

pith:2015:HHNKEHZM2QH2RXVS6JE2OUDDNY

not attested not anchored not stored refs pending

Gaia reference frame amid quasar variability and proper motion patterns in the data

D. Hobbs, L. Lindegren, R. K. Bachchan

arxiv:1512.08917 v2 · 2015-12-30 · astro-ph.IM · 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{HHNKEHZM2QH2RXVS6JE2OUDDNY}

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	2026-05-18T01:13:04.768123Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

39daa21f2cd40fa8deb2f249a750636e038655d62d85f9265cea71a0a7b65d64

Aliases

arxiv: 1512.08917 · arxiv_version: 1512.08917v2 · doi: 10.48550/arxiv.1512.08917 · pith_short_12: HHNKEHZM2QH2 · pith_short_16: HHNKEHZM2QH2RXVS · pith_short_8: HHNKEHZM

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/HHNKEHZM2QH2RXVS6JE2OUDDNY \
  | 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: 39daa21f2cd40fa8deb2f249a750636e038655d62d85f9265cea71a0a7b65d64

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f54fb39ce6ea89f3a2ea2e2c6c6830307c3561d32df0d1c999cd13d4d178afca",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2015-12-30T11:56:18Z",
    "title_canon_sha256": "f4cba8ac4171be084d2589cd29a150eb3510775849713dbc1fad4e9ceb614d95"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.08917",
    "kind": "arxiv",
    "version": 2
  }
}