Pith Number

pith:QXC67OBO

pith:1995:QXC67OBOFKWJNCK2TKOIVAX7DF

not attested not anchored not stored refs pending

GB1508+5714: a radio-loud quasar with z=4.30 and the space density of high redshift, radio--loud quasars.

A. R. Patnaik, C. Hazard, I. M. Hook, I. W. A. Browne, M. J. Irwin, P. N. Wilkinson, R. G. McMahon

arxiv:astro-ph/9502071 v1 · 1995-02-14 · 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{QXC67OBOFKWJNCK2TKOIVAX7DF}

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	2026-05-18T01:12:44.211792Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85c5efb82e2aac96895a9a9c8a82ff195304f2eb0cdee326449368e1e7ac5d09

Aliases

arxiv: astro-ph/9502071 · arxiv_version: astro-ph/9502071v1 · doi: 10.48550/arxiv.astro-ph/9502071 · pith_short_12: QXC67OBOFKWJ · pith_short_16: QXC67OBOFKWJNCK2 · pith_short_8: QXC67OBO

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/QXC67OBOFKWJNCK2TKOIVAX7DF \
  | 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: 85c5efb82e2aac96895a9a9c8a82ff195304f2eb0cdee326449368e1e7ac5d09

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "81ba409214041c3d8de8f0c62dd6741f44ff31867f5ad50bd1c98a733e04bd46",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1995-02-14T09:38:35Z",
    "title_canon_sha256": "8cc90d1759931065442846c512cb75ef5fde26aa22cc2ac40fb474fbbac30468"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9502071",
    "kind": "arxiv",
    "version": 1
  }
}