Pith Number

pith:ORKYYJAW

pith:2001:ORKYYJAWJQBZJ63T45ZABLGVOB

not attested not anchored not stored refs pending

A search for distant radio-loud quasars in the CLASS survey: three new radio-selected quasars at z>4

Emily Xanthopoulos, Ignas Snellen, Jane Dennett-Thorpe, Karl-Heinz Mack, Neal Jackson, Richard McMahon

arxiv:astro-ph/0103291 v1 · 2001-03-19 · astro-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{ORKYYJAWJQBZJ63T45ZABLGVOB}

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	2026-05-18T01:07:45.964641Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

74558c24164c0394fb73e77200acd5704fa4e0529d4deceab5e5f62ae7b3e213

Aliases

arxiv: astro-ph/0103291 · arxiv_version: astro-ph/0103291v1 · doi: 10.48550/arxiv.astro-ph/0103291 · pith_short_12: ORKYYJAWJQBZ · pith_short_16: ORKYYJAWJQBZJ63T · pith_short_8: ORKYYJAW

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/ORKYYJAWJQBZJ63T45ZABLGVOB \
  | 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: 74558c24164c0394fb73e77200acd5704fa4e0529d4deceab5e5f62ae7b3e213

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4f902e3fbe90c633b6f16822b1f2ee36648d0b0cb273f6149c68d48e7c0883ea",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-03-19T12:15:00Z",
    "title_canon_sha256": "b056dc387b823c7e6f653329af94b92a4874c2db708baae1c647b1c3331979a0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0103291",
    "kind": "arxiv",
    "version": 1
  }
}