Pith Number

pith:NI2CFQUE

pith:2011:NI2CFQUEXZLYVP6OL6QBSYANJJ

not attested not anchored not stored refs pending

Emission lines in early-type galaxies: active nuclei or stars?

Alessandro Capetti (1) Ranieri D. Baldi (2) ((1) INAF - Osservatorio Astronomico di Torino, Baltimore, Italy (2) Space Telescope Science Institute, U.S.A.)

arxiv:1103.3652 v1 · 2011-03-18 · 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{NI2CFQUEXZLYVP6OL6QBSYANJJ}

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	2026-05-18T02:02:49.714447Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6a3422c284be578abfce5fa019600d4a63f006e0bd06f9b3388779c861fcf899

Aliases

arxiv: 1103.3652 · arxiv_version: 1103.3652v1 · doi: 10.48550/arxiv.1103.3652 · pith_short_12: NI2CFQUEXZLY · pith_short_16: NI2CFQUEXZLYVP6O · pith_short_8: NI2CFQUE

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/NI2CFQUEXZLYVP6OL6QBSYANJJ \
  | 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: 6a3422c284be578abfce5fa019600d4a63f006e0bd06f9b3388779c861fcf899

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c1eeaa671921aa838d636bab256b54f50609801d770717d4f9eb54eaa42cbee4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-03-18T15:48:50Z",
    "title_canon_sha256": "48b628f1e3a65b95f34e8ff519355cf0b292671f48364b425ba4dd2fafdaf917"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1103.3652",
    "kind": "arxiv",
    "version": 1
  }
}