Pith Number

pith:QPHOVDU4

pith:2014:QPHOVDU4RK22ASNTHRW2U3ZED4

not attested not anchored not stored refs pending

Mining for Dust in Type 1 Quasars

Coleman M. Krawczyk, Gordon T. Richards, Karen M. Leighly, Nicholas P. Ross, Paul C. Hewett, P. B. Hall, S. C. Gallagher

arxiv:1412.7039 v2 · 2014-12-22 · astro-ph.GA · astro-ph.CO · 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{QPHOVDU4RK22ASNTHRW2U3ZED4}

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	2026-05-18T01:59:53.399126Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

83ceea8e9c8ab5a049b33c6daa6f241f2ef9512739ede9112437fd6a59b702f9

Aliases

arxiv: 1412.7039 · arxiv_version: 1412.7039v2 · doi: 10.48550/arxiv.1412.7039 · pith_short_12: QPHOVDU4RK22 · pith_short_16: QPHOVDU4RK22ASNT · pith_short_8: QPHOVDU4

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/QPHOVDU4RK22ASNTHRW2U3ZED4 \
  | 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: 83ceea8e9c8ab5a049b33c6daa6f241f2ef9512739ede9112437fd6a59b702f9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "095a77b14c6a3a26710ab0b1a0a01022e6e7d29a0402a0caa4d55b6163625fb0",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2014-12-22T16:17:27Z",
    "title_canon_sha256": "7fbf1e6b893a3fb7d6f308e1170479be04fa0163ad8b7204e1c0c143faad16a5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1412.7039",
    "kind": "arxiv",
    "version": 2
  }
}