Pith Number

pith:PE23NWZ5

pith:2003:PE23NWZ56AVRYH3OPNXDIRZ6VC

not attested not anchored not stored refs pending

The WSRT wide-field HI survey: I. The background galaxy sample

(2) Johns Hopkins Univ., (3) NMSU), David Thilker (2), Rene Walterbos (3) ((1) ASTRON, Robert Braun (1)

arxiv:astro-ph/0305403 v1 · 2003-05-21 · astro-ph

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

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	2026-05-18T01:07:33.560425Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7935b6db3df02b1c1f6e7b6e34473ea89b544dce5fa16a7910e4ca13d55617f5

Aliases

arxiv: astro-ph/0305403 · arxiv_version: astro-ph/0305403v1 · doi: 10.48550/arxiv.astro-ph/0305403 · pith_short_12: PE23NWZ56AVR · pith_short_16: PE23NWZ56AVRYH3O · pith_short_8: PE23NWZ5

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/PE23NWZ56AVRYH3OPNXDIRZ6VC \
  | 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: 7935b6db3df02b1c1f6e7b6e34473ea89b544dce5fa16a7910e4ca13d55617f5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b2852cb6472fc25bebb01d134cac82fb164f96fc5a030980988f3b3537ecbf11",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-05-21T14:38:53Z",
    "title_canon_sha256": "ee4b0740fe04f183191d7021bf1a187efe9f82f288969484ae60ecffdc376434"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0305403",
    "kind": "arxiv",
    "version": 1
  }
}