Pith Number

pith:NGHDGLVZ

pith:2009:NGHDGLVZT4OUB7PRAA4Y4TYNRV

not attested not anchored not stored refs pending

Deep U-B-V imaging of the Lockman Hole with the LBT. Observations and number counts

D. Lutz, E. Egami, E. Rovilos, G. Hasinger, G. Szokoly, M. Salvato, N. Bouche, R. Genzel, S. Berta, V. Burwitz

arxiv:0909.0661 v1 · 2009-09-03 · astro-ph.CO

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	2026-05-18T02:12:00.286304Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

698e332eb99f1d40fdf100398e4f0d8d659285afe165c71b75c995792cfadeee

Aliases

arxiv: 0909.0661 · arxiv_version: 0909.0661v1 · doi: 10.48550/arxiv.0909.0661 · pith_short_12: NGHDGLVZT4OU · pith_short_16: NGHDGLVZT4OUB7PR · pith_short_8: NGHDGLVZ

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/NGHDGLVZT4OUB7PRAA4Y4TYNRV \
  | 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: 698e332eb99f1d40fdf100398e4f0d8d659285afe165c71b75c995792cfadeee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "20268e1226c332889101e4b96306a577af4af085b773572197faa0e941ca6ac0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-09-03T14:58:42Z",
    "title_canon_sha256": "3e1bcd5e734e3677c9bb86167df0b0fdfb5f66b260c6b7903e4f370baa99f9ff"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.0661",
    "kind": "arxiv",
    "version": 1
  }
}