Pith Number

pith:LW7PTPPA

pith:2000:LW7PTPPALDPNDT3TKCYS4UIRQ5

not attested not anchored not stored refs pending

An Extremely Red Nucleus in an Absorbed QSO at z=0.65

Kouji Ohta (Kyoto Univ.), Masayuki Akiyama (Subaru Telescope, NAOJ)

arxiv:astro-ph/0012502 v1 · 2000-12-27 · 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{LW7PTPPALDPNDT3TKCYS4UIRQ5}

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	2026-05-18T01:40:45.110703Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5dbef9bde058ded1cf7350b12e5111877e2ccef5dcdcf9ca80546e61c61c3563

Aliases

arxiv: astro-ph/0012502 · arxiv_version: astro-ph/0012502v1 · doi: 10.48550/arxiv.astro-ph/0012502 · pith_short_12: LW7PTPPALDPN · pith_short_16: LW7PTPPALDPNDT3T · pith_short_8: LW7PTPPA

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/LW7PTPPALDPNDT3TKCYS4UIRQ5 \
  | 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: 5dbef9bde058ded1cf7350b12e5111877e2ccef5dcdcf9ca80546e61c61c3563

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1bc946bed8377e318858db74a02b038ed02c87eb5d42497e21ed387e42520820",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-12-27T05:55:32Z",
    "title_canon_sha256": "3100a597aebc15c19a498f7444b5e007a11a304b81b059757d563b2610b31e87"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0012502",
    "kind": "arxiv",
    "version": 1
  }
}