Pith Number

pith:3NPPZEMB

pith:2009:3NPPZEMBGA4QTZRSSRHOULWLC7

not attested not anchored not stored refs pending

Spitzer IRS observations of k+a galaxies: A link between PAH emission properties and AGN feedback?

D. Farrah, I. G. Roseboom, S. Oliver

arxiv:0904.4410 v1 · 2009-04-28 · 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{3NPPZEMBGA4QTZRSSRHOULWLC7}

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	2026-05-18T04:29:43.294582Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

db5efc9181303909e632944eea2ecb17f98b04cdacc404be7eba6918714a706d

Aliases

arxiv: 0904.4410 · arxiv_version: 0904.4410v1 · doi: 10.48550/arxiv.0904.4410 · pith_short_12: 3NPPZEMBGA4Q · pith_short_16: 3NPPZEMBGA4QTZRS · pith_short_8: 3NPPZEMB

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/3NPPZEMBGA4QTZRSSRHOULWLC7 \
  | 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: db5efc9181303909e632944eea2ecb17f98b04cdacc404be7eba6918714a706d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6475dcf4a98b9de35a5f996f7750a352c402168db385591ec7f0c75a18d84f6f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-04-28T14:27:42Z",
    "title_canon_sha256": "a425dbfab42994fe14eaa0694294c84b05bac6dc0f1898730c371d68ac19dd28"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.4410",
    "kind": "arxiv",
    "version": 1
  }
}