Pith Number

pith:OPJDYEDD

pith:1994:OPJDYEDDS4HNJAMUYEZEKRZFZ6

not attested not anchored not stored refs pending

The Extragalactic IR Background

A. Franceschini, G. de Zotti, L. Danese, L. Toffolatti, P. Mazzei

arxiv:astro-ph/9410033 v1 · 1994-10-11 · astro-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OPJDYEDDS4HNJAMUYEZEKRZFZ6}

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	2026-07-04T15:56:09.670559Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

73d23c1063970ed48194c132454725cf80ebfff206468cd00bee5605fa23bcab

Aliases

arxiv: astro-ph/9410033 · arxiv_version: astro-ph/9410033v1 · doi: 10.48550/arxiv.astro-ph/9410033 · pith_short_12: OPJDYEDDS4HN · pith_short_16: OPJDYEDDS4HNJAMU · pith_short_8: OPJDYEDD

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/OPJDYEDDS4HNJAMUYEZEKRZFZ6 \
  | 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: 73d23c1063970ed48194c132454725cf80ebfff206468cd00bee5605fa23bcab

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a1539274871d9eb05fb2adc1911bdc3189ed2960027983a5eeab0513df618763",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1994-10-11T21:28:00Z",
    "title_canon_sha256": "22a69b4cfa51303bc1a340fb2cbbee5839f3912973ff3bc857b79f9d785fa308"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9410033",
    "kind": "arxiv",
    "version": 1
  }
}