Pith Number

pith:LAVBHZI5

pith:1998:LAVBHZI5O4XTXTQBKDPRW6P4XT

not attested not anchored not stored refs pending

A comparison of the optical properties of radio-loud and radio-quiet quasars

(2) STScI, 3), (3) University of Edinburgh, (4) University of Oxford), J. S. Dunlop (3) ((1) Imperial College, L. Miller (4), M. J. Kukula (2, P. Goldschmidt (1)

arxiv:astro-ph/9810392 v1 · 1998-10-23 · 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{LAVBHZI5O4XTXTQBKDPRW6P4XT}

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	2026-07-04T16:07:08.345027Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

582a13e51d772f3bce0150df1b79fcbcf504cda7130a4233182f3abe843d251b

Aliases

arxiv: astro-ph/9810392 · arxiv_version: astro-ph/9810392v1 · doi: 10.48550/arxiv.astro-ph/9810392 · pith_short_12: LAVBHZI5O4XT · pith_short_16: LAVBHZI5O4XTXTQB · pith_short_8: LAVBHZI5

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/LAVBHZI5O4XTXTQBKDPRW6P4XT \
  | 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: 582a13e51d772f3bce0150df1b79fcbcf504cda7130a4233182f3abe843d251b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "01f8f05163086fa5ffd2aaffba62cf0cda78bcc5fa53c96064f969ea84996f0a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-10-23T18:35:20Z",
    "title_canon_sha256": "086b8cbff80a391f6f432b9e2121c6010c2cbd685cd5357805c3f8d3a2ab883a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9810392",
    "kind": "arxiv",
    "version": 1
  }
}