Pith Number

pith:NCM6M42E

pith:2012:NCM6M42EPCBBXDQUGMZAE46JEM

not attested not anchored not stored refs pending

Evidence for Widespread AGN Activity among Massive Quiescent Galaxies at z ~ 2

Andrew W. Zirm, Jesper Rasmussen, Karen Pardos Olsen, Sune Toft

arxiv:1212.1158 v2 · 2012-12-05 · 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{NCM6M42EPCBBXDQUGMZAE46JEM}

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	2026-05-18T01:52:47.293724Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6899e6734478821b8e1433320273c923073a47a99caba2f13701f1b47aecf80d

Aliases

arxiv: 1212.1158 · arxiv_version: 1212.1158v2 · doi: 10.48550/arxiv.1212.1158 · pith_short_12: NCM6M42EPCBB · pith_short_16: NCM6M42EPCBBXDQU · pith_short_8: NCM6M42E

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/NCM6M42EPCBBXDQUGMZAE46JEM \
  | 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: 6899e6734478821b8e1433320273c923073a47a99caba2f13701f1b47aecf80d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dd63e8fe1a7dc97dad7b5925ffb8da872bed86ef2c619c1ece8a68ead1c3c0be",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-12-05T21:00:01Z",
    "title_canon_sha256": "f641e36a389838a535d2473924d640e4fd37b5a467a80d725f42fadefa1932f1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.1158",
    "kind": "arxiv",
    "version": 2
  }
}