Pith Number

pith:F7FNKK4S

pith:2000:F7FNKK4SQFRHC5HDVYEULPVA7V

not attested not anchored not stored refs pending

The Hamburg/ESO survey for bright QSOs. III. A large flux-limited sample of QSOs

C. Vanelle, D. Reimers, L. Wisotzki, N. Bade, N. Christlieb, T. Koehler, V. Beckmann

arxiv:astro-ph/0004162 v1 · 2000-04-12 · 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{F7FNKK4SQFRHC5HDVYEULPVA7V}

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.

Cited by

1 paper in Pith

Persephone's Torch: A 15th Magnitude Quadruply-Lensed Quasar From the Couch Discovered with SPHEREx and the LBT

Receipt and verification

First computed	2026-07-04T14:10:17.328971Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2fcad52b9281627174e3ae0945bea0fd7718b72974346bbb80583dce6907ff3b

Aliases

arxiv: astro-ph/0004162 · arxiv_version: astro-ph/0004162v1 · doi: 10.48550/arxiv.astro-ph/0004162 · pith_short_12: F7FNKK4SQFRH · pith_short_16: F7FNKK4SQFRHC5HD · pith_short_8: F7FNKK4S

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/F7FNKK4SQFRHC5HDVYEULPVA7V \
  | 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: 2fcad52b9281627174e3ae0945bea0fd7718b72974346bbb80583dce6907ff3b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1ae59dd29caef6ad8440966032167cb995a6e147a327fc80d8c33a250d1bd06f",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-04-12T17:08:33Z",
    "title_canon_sha256": "120ae3ff8e3df8e0a57166cac8731b894c49630e46d919bad713aa88d5f2ced6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0004162",
    "kind": "arxiv",
    "version": 1
  }
}