Pith Number

pith:54YW2B74

pith:2019:54YW2B747KG2WTUPK2F63MAB65

not attested not anchored not stored refs pending

Extragalactic Background Light: Inventory of light throughout the cosmic history

3) ((1) Department of Physics, Cape Town, Finland (2) South African Astronomical Observatory, Kalevi Mattila (1), Petri V\"ais\"anen (2, South Africa), South Africa (3) Southern African Large Telescope, University of Helsinki

arxiv:1905.08825 v1 · 2019-05-21 · astro-ph.GA · 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{54YW2B747KG2WTUPK2F63MAB65}

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	2026-05-17T23:45:25.120240Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ef316d07fcfa8dab4e8f568bedb001f779ace58a629ff90e58e6176934859086

Aliases

arxiv: 1905.08825 · arxiv_version: 1905.08825v1 · doi: 10.48550/arxiv.1905.08825 · pith_short_12: 54YW2B747KG2 · pith_short_16: 54YW2B747KG2WTUP · pith_short_8: 54YW2B74

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/54YW2B747KG2WTUPK2F63MAB65 \
  | 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: ef316d07fcfa8dab4e8f568bedb001f779ace58a629ff90e58e6176934859086

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cb4d4ea0be6f1a7cb5854039c5888a55c3db7d2b35a4f46d077860b0c33a87bf",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-05-21T18:17:18Z",
    "title_canon_sha256": "c1df71b2142d84074fe84d5207345972090a085be6ac528b6717de3cc33add1f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.08825",
    "kind": "arxiv",
    "version": 1
  }
}