Pith Number

pith:S57O3WAK

pith:2019:S57O3WAKG3P5MFC74UB343LAFB

not attested not anchored not stored refs pending

The 'Big Dipper': The nature of the extreme variability of the AGN SDSS J2232-0806

Alastair G. Bruce, Andy Lawrence, Chelsea L. MacLeod, Daniel Kynoch, Hermine Landt, Martin J. Ward

arxiv:1902.06753 v1 · 2019-02-18 · 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{S57O3WAKG3P5MFC74UB343LAFB}

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	2026-05-17T23:52:35.864812Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

977eedd80a36dfd6145fe503be6d60286887657bdbae3e45a0642b36a2a15d7e

Aliases

arxiv: 1902.06753 · arxiv_version: 1902.06753v1 · doi: 10.48550/arxiv.1902.06753 · pith_short_12: S57O3WAKG3P5 · pith_short_16: S57O3WAKG3P5MFC7 · pith_short_8: S57O3WAK

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/S57O3WAKG3P5MFC74UB343LAFB \
  | 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: 977eedd80a36dfd6145fe503be6d60286887657bdbae3e45a0642b36a2a15d7e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "05a4ac4eb9dc2588af0702cc64c196d95f721f57062e92d8e6daa76ed5f660c1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-02-18T19:00:05Z",
    "title_canon_sha256": "b095e0858fc14df7c467607cb56559b149cf311b5dacb31f52d90e9cad25eb2a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.06753",
    "kind": "arxiv",
    "version": 1
  }
}