Pith Number

pith:QTDRUKZY

pith:2013:QTDRUKZYQWU45F4SUY2MHBXHC2

not attested not anchored not stored refs pending

Calcium H & K Induced by Galaxy Halos

Brice M\'enard (JHU), Guangtun Zhu

arxiv:1304.0451 v1 · 2013-04-01 · 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{QTDRUKZYQWU45F4SUY2MHBXHC2}

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	2026-05-18T01:50:50.369636Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

84c71a2b3885a9ce9792a634c386e716aa6cd55f404b2b2cd2371f35bf91526e

Aliases

arxiv: 1304.0451 · arxiv_version: 1304.0451v1 · doi: 10.48550/arxiv.1304.0451 · pith_short_12: QTDRUKZYQWU4 · pith_short_16: QTDRUKZYQWU45F4S · pith_short_8: QTDRUKZY

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/QTDRUKZYQWU45F4SUY2MHBXHC2 \
  | 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: 84c71a2b3885a9ce9792a634c386e716aa6cd55f404b2b2cd2371f35bf91526e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5833f939b2551c5fc98658c1fc0bf0e75f811a5ff4b05fe0fa54299e450451a1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-04-01T20:00:02Z",
    "title_canon_sha256": "8eb285505213fbb39a4ec18b9e6b4a883dd637b33436ad0ea29bb0c5a277b898"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.0451",
    "kind": "arxiv",
    "version": 1
  }
}