Pith Number

pith:5BDL4J6L

pith:2009:5BDL4J6LYKD36CVVUKRUMW3KLQ

not attested not anchored not stored refs pending

Host Galaxies of z=4 Quasars

Jill Bechtold (Steward Observatory, K. K. McLeod (Wellesley College), University of Arizona)

arxiv:0909.2630 v1 · 2009-09-14 · 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{5BDL4J6LYKD36CVVUKRUMW3KLQ}

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	2026-05-18T02:34:30.106521Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e846be27cbc287bf0ab5a2a3465b6a5c272448ce2ac214896f577fb6704c4c5c

Aliases

arxiv: 0909.2630 · arxiv_version: 0909.2630v1 · doi: 10.48550/arxiv.0909.2630 · pith_short_12: 5BDL4J6LYKD3 · pith_short_16: 5BDL4J6LYKD36CVV · pith_short_8: 5BDL4J6L

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/5BDL4J6LYKD36CVVUKRUMW3KLQ \
  | 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: e846be27cbc287bf0ab5a2a3465b6a5c272448ce2ac214896f577fb6704c4c5c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6512ce4b183885c3f439e88dc09d17a06d0f0d04a2e890efa5538a6d08912257",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-09-14T19:23:55Z",
    "title_canon_sha256": "f946623b92e2290c6dd825680e2ad1b7abe7538389cd2e9f25f7bab6d3beac90"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.2630",
    "kind": "arxiv",
    "version": 1
  }
}