Pith Number

pith:YO3LQZPB

pith:1997:YO3LQZPBGD7EY4GLTG4ISSMKLP

not attested not anchored not stored refs pending

Are optically-selected QSO catalogs biased ?

E. Martinez-Gonzalez (IFCA-UC), I. Ferreras, N. Benitez

arxiv:astro-ph/9707153 v1 · 1997-07-14 · 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{YO3LQZPBGD7EY4GLTG4ISSMKLP}

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	2026-07-04T16:03:07.379563Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c3b6b865e130fe4c70cb99b889498a5bf4cde34df6ee3ab27230e0688bbed03c

Aliases

arxiv: astro-ph/9707153 · arxiv_version: astro-ph/9707153v1 · doi: 10.48550/arxiv.astro-ph/9707153 · pith_short_12: YO3LQZPBGD7E · pith_short_16: YO3LQZPBGD7EY4GL · pith_short_8: YO3LQZPB

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/YO3LQZPBGD7EY4GLTG4ISSMKLP \
  | 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: c3b6b865e130fe4c70cb99b889498a5bf4cde34df6ee3ab27230e0688bbed03c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7ffd9b417672e709e63f8c43313f2e4693f4aa2dae72f872689bf629b0c283b4",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-07-14T17:45:15Z",
    "title_canon_sha256": "31e23c5392e7db4ace297a58567e618f87eab1d24a009c86899a2c20b9bf9207"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9707153",
    "kind": "arxiv",
    "version": 1
  }
}