Pith Number

pith:IHL3WEKZ

pith:2013:IHL3WEKZH2HRAM33TZ6WC3RIHA

not attested not anchored not stored refs pending

A Long XMM-Newton Observation of An Extreme Narrow Line Seyfert 1: PG 1244+026

Chichuan Jin, Chris Done, Martin Ward, Matthew Middleton

arxiv:1309.5875 v1 · 2013-09-23 · 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{IHL3WEKZH2HRAM33TZ6WC3RIHA}

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	2026-05-18T01:47:34.136752Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

41d7bb11593e8f10337b9e7d616e28382c1a46cd5eb7428d04979b234aaffe9a

Aliases

arxiv: 1309.5875 · arxiv_version: 1309.5875v1 · doi: 10.48550/arxiv.1309.5875 · pith_short_12: IHL3WEKZH2HR · pith_short_16: IHL3WEKZH2HRAM33 · pith_short_8: IHL3WEKZ

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/IHL3WEKZH2HRAM33TZ6WC3RIHA \
  | 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: 41d7bb11593e8f10337b9e7d616e28382c1a46cd5eb7428d04979b234aaffe9a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "be2850c303648e53e9fb84ab5a8f89ea127355e6e2440820bd3e22227c4e93ea",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2013-09-23T16:52:24Z",
    "title_canon_sha256": "af26f2440d4cda991277a9f8f27b34b544f594993ca75f54f25bc874e0ac2078"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.5875",
    "kind": "arxiv",
    "version": 1
  }
}