Pith Number

pith:LEQK7SSO

pith:1995:LEQK7SSOXOBGVVT3D3AQ7IM3RI

not attested not anchored not stored refs pending

THE UNUSUAL X-RAY AND OPTICAL PROPERTIES OF THE ULTRASOFT AGN ZWICKY 159.034 (RE J 1237+264)

H. Fink, K.A. Pounds, W.N. Brandt

arxiv:astro-ph/9501108 v1 · 1995-01-31 · 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{LEQK7SSOXOBGVVT3D3AQ7IM3RI}

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	2026-05-18T01:12:44.216924Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5920afca4ebb826ad67b1ec10fa19b8a1e86b87cd798faca3674704322da2aef

Aliases

arxiv: astro-ph/9501108 · arxiv_version: astro-ph/9501108v1 · doi: 10.48550/arxiv.astro-ph/9501108 · pith_short_12: LEQK7SSOXOBG · pith_short_16: LEQK7SSOXOBGVVT3 · pith_short_8: LEQK7SSO

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/LEQK7SSOXOBGVVT3D3AQ7IM3RI \
  | 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: 5920afca4ebb826ad67b1ec10fa19b8a1e86b87cd798faca3674704322da2aef

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5630b120231c8a45d8aaec976dae0d753c416eb27d53489f6ed209b65ac5720f",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1995-01-31T11:00:37Z",
    "title_canon_sha256": "a0f25f4e0689e6863a0e253ac46ff498d38934ed84a7907c7c36eb6e1a9a5c6f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9501108",
    "kind": "arxiv",
    "version": 1
  }
}