Pith Number

pith:A7PSKKJO

pith:2011:A7PSKKJO72ILOSFDJC2G3XZ7BH

not attested not anchored not stored refs pending

NGC 5548: Lack of a Broad Fe K Line and Constraints on the Location of the Hard X-ray Source

Laura Brenneman, Martin Elvis, Smita Mathur, Yair Krongold, Yuan Liu

arxiv:1109.4651 v1 · 2011-09-21 · 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{A7PSKKJO72ILOSFDJC2G3XZ7BH}

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	2026-05-18T02:00:26.904226Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

07df25292efe90b748a348b46ddf3f09fb7854043811d830909779243d7f9a68

Aliases

arxiv: 1109.4651 · arxiv_version: 1109.4651v1 · doi: 10.48550/arxiv.1109.4651 · pith_short_12: A7PSKKJO72IL · pith_short_16: A7PSKKJO72ILOSFD · pith_short_8: A7PSKKJO

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/A7PSKKJO72ILOSFDJC2G3XZ7BH \
  | 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: 07df25292efe90b748a348b46ddf3f09fb7854043811d830909779243d7f9a68

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "db3641789221463402e4bc1d8d044de4b41ef87593db1910c7275ce62b1c01b9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2011-09-21T20:39:04Z",
    "title_canon_sha256": "ef56d28fb7f1b8ea2393b54713a1a3e5b578c512a6ad7c35d396ee90a99aa7b0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.4651",
    "kind": "arxiv",
    "version": 1
  }
}