Pith Number

pith:QVEBPLP3

pith:2002:QVEBPLP3P7NI5HGQBGL42XIE3F

not attested not anchored not stored refs pending

High-resolution X-ray imaging and spectroscopy of the core of NGC 4945 with XMM-Newton and Chandra

Leicester, N.J. Schurch (1), R.S. Warwick (1) ((1) The university of Leicester, T.P. Roberts (1), UK)

arxiv:astro-ph/0204361 v1 · 2002-04-22 · 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{QVEBPLP3P7NI5HGQBGL42XIE3F}

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	2026-05-18T01:07:44.952229Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

854817adfb7fda8e9cd00997cd5d04d94aade8110fffd942d2522be46bc1dcb1

Aliases

arxiv: astro-ph/0204361 · arxiv_version: astro-ph/0204361v1 · doi: 10.48550/arxiv.astro-ph/0204361 · pith_short_12: QVEBPLP3P7NI · pith_short_16: QVEBPLP3P7NI5HGQ · pith_short_8: QVEBPLP3

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/QVEBPLP3P7NI5HGQBGL42XIE3F \
  | 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: 854817adfb7fda8e9cd00997cd5d04d94aade8110fffd942d2522be46bc1dcb1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cc68060ee9052aa87e2218b1a0ae8324d1f91dc58f514531f236e33401a80be2",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-04-22T11:05:36Z",
    "title_canon_sha256": "93216642cdb1159dda897766b7b9a59fd26cbd34ef1371955d0847d6e87b9eea"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0204361",
    "kind": "arxiv",
    "version": 1
  }
}