Pith Number

pith:JKECM7AH

pith:1998:JKECM7AHYXQBN2S2JBTFI4TQ3J

not attested not anchored not stored refs pending

A method to determine the parameters of black holes in AGNs and galactic X-ray sources with periodic modulation of variability

F. de Felice, O. Semerak, V. Karas

arxiv:astro-ph/9802025 v1 · 1998-02-03 · 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{JKECM7AHYXQBN2S2JBTFI4TQ3J}

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	2026-05-18T01:40:14.415180Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4a88267c07c5e016ea5a4866547270da4f9a3ab5b54b4ef8faeaecab64a9f5e9

Aliases

arxiv: astro-ph/9802025 · arxiv_version: astro-ph/9802025v1 · doi: 10.48550/arxiv.astro-ph/9802025 · pith_short_12: JKECM7AHYXQB · pith_short_16: JKECM7AHYXQBN2S2 · pith_short_8: JKECM7AH

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/JKECM7AHYXQBN2S2JBTFI4TQ3J \
  | 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: 4a88267c07c5e016ea5a4866547270da4f9a3ab5b54b4ef8faeaecab64a9f5e9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "14982784c4ed233f5caba77ef10cde44e7e4d5577cb3f09b543b928a7e09f8d4",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-02-03T01:01:53Z",
    "title_canon_sha256": "97ea413a1b7391862ad1fd763535516f88ea0391b04b1e6d0e1b359d56597b61"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9802025",
    "kind": "arxiv",
    "version": 1
  }
}