Pith Number

pith:62OLV44I

pith:2009:62OLV44IQTXD2NYFR24TNMDLZE

not attested not anchored not stored refs pending

The Large Quasar Reference Frame (LQRF) - an optical representation of the ICRS

A.H. Andrei, C. Barache, D.N. da Silva Neto, F. Taris, J.I.B. Camargo, J.L. Penna, J. Souchay, M. Assafin, N. Zacharias, R.L. Smart, R. Vieira Martins, S. Bouquillon

arxiv:0907.2403 v1 · 2009-07-14 · 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{62OLV44IQTXD2NYFR24TNMDLZE}

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	2026-05-18T02:13:03.119414Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f69cbaf38884ee3d37058eb936b06bc900843793611e1544002c4b0c5bec6db4

Aliases

arxiv: 0907.2403 · arxiv_version: 0907.2403v1 · doi: 10.48550/arxiv.0907.2403 · pith_short_12: 62OLV44IQTXD · pith_short_16: 62OLV44IQTXD2NYF · pith_short_8: 62OLV44I

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/62OLV44IQTXD2NYFR24TNMDLZE \
  | 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: f69cbaf38884ee3d37058eb936b06bc900843793611e1544002c4b0c5bec6db4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "719b7d01edd4b4760d8184c2abdb180bcd4e1a0632b42f247f2546385fc39b67",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-07-14T16:30:10Z",
    "title_canon_sha256": "2fd52afb3005f17d5ef4f2fd7d17e4c4fa45b8cd8255f2d04cbc954d06f503ea"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.2403",
    "kind": "arxiv",
    "version": 1
  }
}