Pith Number

pith:3KYPIM2C

pith:2013:3KYPIM2CTT76J7WKFMIKS7WFSG

not attested not anchored not stored refs pending

On inferring extinction laws in z~6 quasars as signatures of supernova dust

Christa Gall, Darach Watson, Jens Hjorth, Paul M. Vreeswijk

arxiv:1304.2337 v1 · 2013-04-08 · 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{3KYPIM2CTT76J7WKFMIKS7WFSG}

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	2026-05-18T03:27:00.776439Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dab0f433429cffe4feca2b10a97ec5919e3fc9875f77b9f6132e5118a5342e52

Aliases

arxiv: 1304.2337 · arxiv_version: 1304.2337v1 · doi: 10.48550/arxiv.1304.2337 · pith_short_12: 3KYPIM2CTT76 · pith_short_16: 3KYPIM2CTT76J7WK · pith_short_8: 3KYPIM2C

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/3KYPIM2CTT76J7WKFMIKS7WFSG \
  | 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: dab0f433429cffe4feca2b10a97ec5919e3fc9875f77b9f6132e5118a5342e52

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bddf16dde40d7c8c83502d8257d92f9157c7c378534293cffc2ec0c335c6ee25",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-04-08T19:59:09Z",
    "title_canon_sha256": "dbb589287f1cf0454491291889ccf25e7ff1654c5fc8a8b0462143968c9f09d5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.2337",
    "kind": "arxiv",
    "version": 1
  }
}