Pith Number

pith:XY6MREKE

pith:2012:XY6MREKE3XJIWSKINARGD5ZEYO

not attested not anchored not stored refs pending

IR-derived covering factors for a large sample of quasars from WISE-UKIDSS-SDSS

(3) UCLA, 4) ((1) IfA, (4) SISSA), A. Lawrence (1), Edinburgh (2) CfA, Harvard, H. Hao (2, I. G. Roseboom (1), M. Elvis (2), S. Petty (3), Yue Shen (2)

arxiv:1205.4543 v2 · 2012-05-21 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XY6MREKE3XJIWSKINARGD5ZEYO}

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	2026-05-18T01:57:25.133308Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

be3cc89144ddd28b4948682261f724c3a7f1e5d41f67f73a23abf6740fd9a05d

Aliases

arxiv: 1205.4543 · arxiv_version: 1205.4543v2 · doi: 10.48550/arxiv.1205.4543 · pith_short_12: XY6MREKE3XJI · pith_short_16: XY6MREKE3XJIWSKI · pith_short_8: XY6MREKE

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/XY6MREKE3XJIWSKINARGD5ZEYO \
  | 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: be3cc89144ddd28b4948682261f724c3a7f1e5d41f67f73a23abf6740fd9a05d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d122c329f1bce36b60ce5ee7d27f93b8be132a4bf3ea68d7a805f32783397961",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-05-21T09:48:22Z",
    "title_canon_sha256": "2d087f47597d436c8ed3a737d63a3da2b1c0fe8c621e0e2874c8585cc89a4ed0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1205.4543",
    "kind": "arxiv",
    "version": 2
  }
}