Pith Number

pith:6OY5Z26Y

pith:1999:6OY5Z26YAO27XGGT6DJKRQ2CQ6

not attested not anchored not stored refs pending

Hard X-Ray Radiation in the Coma Cluster Spectrum

(3) IRA CNR Bologna, 4), (4) Univ. Bologna, (5) Univ. Roma Tre, (6) IFC CNR, (7) IFCAI CNR, A. Santangelo (7) ((1) IAS CNR, Bologna, D. Dal Fiume (2), G. Giovannini (3, G. Matt (5), L. Feretti (3), Milano, Palermo), P. Grandi (1), R. Fusco-Femiano (1), Roma (2) TESRE CNR, S. Molendi (6)

arxiv:astro-ph/9901018 v1 · 1999-01-04 · 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{6OY5Z26YAO27XGGT6DJKRQ2CQ6}

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

NuSTAR Observations of the Galaxy Cluster Abell 3667

Receipt and verification

First computed	2026-07-04T16:10:34.910576Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f3b1dcebd803b5fb98d3f0d2a8c34287a3e9d452911081a0439729f931fd9f6a

Aliases

arxiv: astro-ph/9901018 · arxiv_version: astro-ph/9901018v1 · doi: 10.48550/arxiv.astro-ph/9901018 · pith_short_12: 6OY5Z26YAO27 · pith_short_16: 6OY5Z26YAO27XGGT · pith_short_8: 6OY5Z26Y

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/6OY5Z26YAO27XGGT6DJKRQ2CQ6 \
  | 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: f3b1dcebd803b5fb98d3f0d2a8c34287a3e9d452911081a0439729f931fd9f6a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "abe373e9a01ebd19444b0636e9dcfff4efce74b1d182d32ebbca9b789560e935",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-01-04T12:21:46Z",
    "title_canon_sha256": "1bd5bbdc42fb104ebbfb6f465e017d61c9059a0c0584a09097a4f310526b7835"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9901018",
    "kind": "arxiv",
    "version": 1
  }
}