Pith Number

pith:W25CGKLK

pith:2009:W25CGKLKS3NR4SS2OT6BEM25BM

not attested not anchored not stored refs pending

Nuclear activity and star formation properties of Seyfert 2 galaxies

F. Di Mille, L. Vaona, P. Rafanelli, R. d'Abrusco, S. Ciroi, V. Cracco

arxiv:0909.5331 v2 · 2009-09-29 · 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{W25CGKLKS3NR4SS2OT6BEM25BM}

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	2026-05-18T02:34:20.854615Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b6ba23296a96db1e4a5a74fc12335d0b16babd31bf5f63424f310863fc293b4e

Aliases

arxiv: 0909.5331 · arxiv_version: 0909.5331v2 · doi: 10.48550/arxiv.0909.5331 · pith_short_12: W25CGKLKS3NR · pith_short_16: W25CGKLKS3NR4SS2 · pith_short_8: W25CGKLK

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/W25CGKLKS3NR4SS2OT6BEM25BM \
  | 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: b6ba23296a96db1e4a5a74fc12335d0b16babd31bf5f63424f310863fc293b4e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1f7c7b9fe4fd45895bdb609c291fc09fe9f86adbf3be3338956dae6c8c5648ab",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-09-29T13:03:31Z",
    "title_canon_sha256": "f6928e3c965268dc083c29fb20e2e58b15a968b8e765aa41487a0870ce343136"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.5331",
    "kind": "arxiv",
    "version": 2
  }
}