Pith Number

pith:XSJ3ZM5G

pith:2004:XSJ3ZM5GXGZV6RT226PTF7HASB

not attested not anchored not stored refs pending

Extragalactic science at very high spectral resolution

Eric Emsellem

arxiv:astro-ph/0409623 v1 · 2004-09-27 · 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{XSJ3ZM5GXGZV6RT226PTF7HASB}

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	2026-07-04T16:44:45.883303Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bc93bcb3a6b9b35f467ad79f32fce0904c3dacb3409036b589bd6236dbd27c41

Aliases

arxiv: astro-ph/0409623 · arxiv_version: astro-ph/0409623v1 · doi: 10.48550/arxiv.astro-ph/0409623 · pith_short_12: XSJ3ZM5GXGZV · pith_short_16: XSJ3ZM5GXGZV6RT2 · pith_short_8: XSJ3ZM5G

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/XSJ3ZM5GXGZV6RT226PTF7HASB \
  | 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: bc93bcb3a6b9b35f467ad79f32fce0904c3dacb3409036b589bd6236dbd27c41

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5ea30386447b25e1ba974b760e55a92067084e3d36da0d486e6681a33c086a10",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-09-27T10:16:27Z",
    "title_canon_sha256": "c1311475982c06f53309b37e76266e73c6a3179be419b907f0f2b2b62d14c1dd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0409623",
    "kind": "arxiv",
    "version": 1
  }
}