Pith Number

pith:RLFWLUOG

pith:2012:RLFWLUOG5IWWS4Q4T4QLSQW3EW

not attested not anchored not stored refs pending

The `harder when brighter' X-ray behaviour of the low luminosity active galactic nucleus NGC 7213

D. E. Calvelo, D. Emmanoulopoulos, I. E. Papadakis, I. M. McHardy, P. Arevalo, P.Uttley

arxiv:1205.3524 v1 · 2012-05-15 · astro-ph.CO · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RLFWLUOG5IWWS4Q4T4QLSQW3EW}

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	2026-05-18T01:57:31.747913Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8acb65d1c6ea2d69721c9f20b942db259b459ebe354cba35a337eeddfd15c404

Aliases

arxiv: 1205.3524 · arxiv_version: 1205.3524v1 · doi: 10.48550/arxiv.1205.3524 · pith_short_12: RLFWLUOG5IWW · pith_short_16: RLFWLUOG5IWWS4Q4 · pith_short_8: RLFWLUOG

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/RLFWLUOG5IWWS4Q4T4QLSQW3EW \
  | 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: 8acb65d1c6ea2d69721c9f20b942db259b459ebe354cba35a337eeddfd15c404

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "51a744bebadae459ca4e3d393eda070037f896a3b0a5ba2e5debc5b6dd6a0c31",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-05-15T22:57:18Z",
    "title_canon_sha256": "0598b6d09f2c980aa4d92a8de144e4213651581708b485f0bf349a79c0edff0c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1205.3524",
    "kind": "arxiv",
    "version": 1
  }
}