Pith Number

pith:QFZIMW3D

pith:2013:QFZIMW3DMO37XZAPLRO6IDO74Y

not attested not anchored not stored refs pending

Caught in the Act: Discovery of a Physical Quasar Triplet

C. Montuori, E. P. Farina, M. Fumagalli, R. Decarli

arxiv:1302.0849 v1 · 2013-02-04 · 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{QFZIMW3DMO37XZAPLRO6IDO74Y}

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	2026-05-18T01:51:50.586748Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8172865b6363b7fbe40f5c5de40ddfe61a5ce6945fb63220fe644deb9e343c6d

Aliases

arxiv: 1302.0849 · arxiv_version: 1302.0849v1 · doi: 10.48550/arxiv.1302.0849 · pith_short_12: QFZIMW3DMO37 · pith_short_16: QFZIMW3DMO37XZAP · pith_short_8: QFZIMW3D

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/QFZIMW3DMO37XZAPLRO6IDO74Y \
  | 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: 8172865b6363b7fbe40f5c5de40ddfe61a5ce6945fb63220fe644deb9e343c6d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "72346f3d3947e42350a4efe36c49e415d8a7caa1e0968dfaf160dfff5e220b45",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-02-04T21:00:04Z",
    "title_canon_sha256": "f6dc9406bbd4b05b7bb4d7b0d57762e4aafc47d393c94181696657d2be7ff463"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.0849",
    "kind": "arxiv",
    "version": 1
  }
}