Pith Number

pith:UM23EU3I

pith:2013:UM23EU3IHGU7QESSRE5OFBOZZP

not attested not anchored not stored refs pending

BAL QSOs and Extreme UFOs: the Eddington connection

Andrew R. King, Kastytis Zubovas

arxiv:1304.1691 v1 · 2013-04-05 · astro-ph.GA · 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{UM23EU3IHGU7QESSRE5OFBOZZP}

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	2026-05-18T01:50:42.473087Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a335b2536839a9f81252893ae285d9cbf05f5f3a2d9c9eaaffc93da7573233c4

Aliases

arxiv: 1304.1691 · arxiv_version: 1304.1691v1 · doi: 10.48550/arxiv.1304.1691 · pith_short_12: UM23EU3IHGU7 · pith_short_16: UM23EU3IHGU7QESS · pith_short_8: UM23EU3I

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/UM23EU3IHGU7QESSRE5OFBOZZP \
  | 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: a335b2536839a9f81252893ae285d9cbf05f5f3a2d9c9eaaffc93da7573233c4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "36c7be1306d0d6ac57f41432d80fba0784cfb236f387fd6d3ec6785304dc9e9e",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2013-04-05T12:06:24Z",
    "title_canon_sha256": "361167135755fabe904c80337e776e1227992b3e8900c11ab10c75e46d453496"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.1691",
    "kind": "arxiv",
    "version": 1
  }
}