Pith Number

pith:H4DJ4TKN

pith:2000:H4DJ4TKNUX2AZ4NORM2DNON7QC

not attested not anchored not stored refs pending

Radio Properties of z>4 Optically-Selected Quasars

(2) Caltech, (3) Nrao, (4) Observatorio Nacional, (5) Oxford), Brazil, Daniel Stern (1), & J.V. Wall (5) ((1) UC-Berkeley, R.A. Perley (3), Reinaldo R. deCarvalho (4), S.G. Djorgovski (2)

arxiv:astro-ph/0001394 v1 · 2000-01-22 · 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{H4DJ4TKNUX2AZ4NORM2DNON7QC}

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

Analytical modeling of the one-dimensional power spectrum of 21-cm forest based on a halo model method

Receipt and verification

First computed	2026-07-04T16:15:57.268503Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3f069e4d4da5f40cf1ae8b3436b9bf80981ef4e439aafda3cf60250d1808cbeb

Aliases

arxiv: astro-ph/0001394 · arxiv_version: astro-ph/0001394v1 · doi: 10.48550/arxiv.astro-ph/0001394 · pith_short_12: H4DJ4TKNUX2A · pith_short_16: H4DJ4TKNUX2AZ4NO · pith_short_8: H4DJ4TKN

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/H4DJ4TKNUX2AZ4NORM2DNON7QC \
  | 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: 3f069e4d4da5f40cf1ae8b3436b9bf80981ef4e439aafda3cf60250d1808cbeb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e1066485bd0f8c4a51f3c178300e87c1f44b188392c1be4e2e3b97d1aa2c91d5",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-01-22T00:02:21Z",
    "title_canon_sha256": "2c6ba5be82720d3f633271b1e73744652367f95a10aad24dcbc8a785db1111f7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0001394",
    "kind": "arxiv",
    "version": 1
  }
}