Pith Number

pith:3HZADMWK

pith:2002:3HZADMWKZ6NQBDUQ5XMXBSMLMW

not attested not anchored not stored refs pending

XMM-NEWTON Observation of the Seyfert 2 Galaxy NGC 4138

A. L. Longinotti, F. Gianotti, F. Panessa, G. Di Cocco, G. Malaguti, J.B. Stephen, L. Bassani, L. C. Ho, L. Foschini, M. Cappi, M. Dadina, M. Trifoglio

arxiv:astro-ph/0209098 v1 · 2002-09-05 · 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{3HZADMWKZ6NQBDUQ5XMXBSMLMW}

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	2026-07-04T14:12:12.591847Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d9f201b2cacf9b008e90edd970c98b65ae1c4788fd9e45976e73b753053e15ee

Aliases

arxiv: astro-ph/0209098 · arxiv_version: astro-ph/0209098v1 · doi: 10.48550/arxiv.astro-ph/0209098 · pith_short_12: 3HZADMWKZ6NQ · pith_short_16: 3HZADMWKZ6NQBDUQ · pith_short_8: 3HZADMWK

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/3HZADMWKZ6NQBDUQ5XMXBSMLMW \
  | 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: d9f201b2cacf9b008e90edd970c98b65ae1c4788fd9e45976e73b753053e15ee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "020d32fa0cad3aeab9722e9d2b052ff7e0c4c5584f8bd4880372a05a9dae3bc1",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-09-05T14:30:10Z",
    "title_canon_sha256": "290504d9d728b32305f664227c36661edc4b9cbfcf3255e16320dd5ff6e069cb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0209098",
    "kind": "arxiv",
    "version": 1
  }
}