Pith Number

pith:Y643TC3Y

pith:2009:Y643TC3YN7A5ETYKLWRN5Z7UMA

not attested not anchored not stored refs pending

XMM-Newton long-look observation of the narrow line Seyfert 1 galaxy PKS0558-504; I: Spectral analysis

C. Raeth, F. Nicastro, I.E. Papadakis, M. Gliozzi, M. L. Conciatore, W. Brinkmann

arxiv:0912.4416 v1 · 2009-12-22 · astro-ph.CO · astro-ph.HE

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Y643TC3YN7A5ETYKLWRN5Z7UMA}

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	2026-05-18T02:10:14.598104Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c7b9b98b786fc1d24f0a5da2dee7f4602516ca7f41b79c407e210b43b96c5d51

Aliases

arxiv: 0912.4416 · arxiv_version: 0912.4416v1 · doi: 10.48550/arxiv.0912.4416 · pith_short_12: Y643TC3YN7A5 · pith_short_16: Y643TC3YN7A5ETYK · pith_short_8: Y643TC3Y

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/Y643TC3YN7A5ETYKLWRN5Z7UMA \
  | 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: c7b9b98b786fc1d24f0a5da2dee7f4602516ca7f41b79c407e210b43b96c5d51

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0b9607a7b8dfb3230fde4ce66c119cb2c6fccd056bca5cd41938ddaa4ccd62f7",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-12-22T14:55:25Z",
    "title_canon_sha256": "9a84ae329a78e1e31a6b694ef6d5223d7033b1cd2228c20ebb7381b5647afb61"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.4416",
    "kind": "arxiv",
    "version": 1
  }
}