Pith Number

pith:D4QBLDBA

pith:1998:D4QBLDBA5DPTHINBW3JLJSJDAZ

not attested not anchored not stored refs pending

The Complex X-ray Spectrum of 3C 273: ASCA Observations

Columbia Univ.-USA), C. Otani (RIKEN), ITeSRE-Bologna), K.M. Leighly (RIKEN, M. Cappi (RIKEN-Japan, M. Matsuoka (RIKEN)

arxiv:astro-ph/9803225 v1 · 1998-03-19 · 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{D4QBLDBA5DPTHINBW3JLJSJDAZ}

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	2026-05-18T01:40:14.254487Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1f20158c20e8df33a1a1b6d2b4c923066ef73ed108d2773c904e3ba276eac916

Aliases

arxiv: astro-ph/9803225 · arxiv_version: astro-ph/9803225v1 · doi: 10.48550/arxiv.astro-ph/9803225 · pith_short_12: D4QBLDBA5DPT · pith_short_16: D4QBLDBA5DPTHINB · pith_short_8: D4QBLDBA

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/D4QBLDBA5DPTHINBW3JLJSJDAZ \
  | 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: 1f20158c20e8df33a1a1b6d2b4c923066ef73ed108d2773c904e3ba276eac916

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7024ab011a08dc552a61c1f201eec714de2cab0fa8f7c618e55c696b02dfa2df",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-03-19T11:27:45Z",
    "title_canon_sha256": "d8889128baf69457d309d76afd1c6f4c6627e0bfba7d3b9c8de734e3fbbb72e5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9803225",
    "kind": "arxiv",
    "version": 1
  }
}