Pith Number

pith:NM4UVV7Q

pith:2011:NM4UVV7QMZZSJEGREVNCRK7WSF

not attested not anchored not stored refs pending

The Galaxy Zoo survey for giant AGN-ionized clouds: past and present black-hole accretion events

Alessandro Sonnenfeld, A. M. Nierenberg, Anna Pancoast, Chelsea Harris, Chris J. Lintott, Kevin Schawinski, Richard Proctor, S. Drew Chojnowski, Stuart Lynn, Vardha N. Bennert, William C. Keel

arxiv:1110.6921 v2 · 2011-10-31 · 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{NM4UVV7QMZZSJEGREVNCRK7WSF}

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	2026-05-18T04:05:58.902222Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6b394ad7f066732490d1255a28abf69152c8ef9d243ba09675372708d770d9a5

Aliases

arxiv: 1110.6921 · arxiv_version: 1110.6921v2 · doi: 10.48550/arxiv.1110.6921 · pith_short_12: NM4UVV7QMZZS · pith_short_16: NM4UVV7QMZZSJEGR · pith_short_8: NM4UVV7Q

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/NM4UVV7QMZZSJEGREVNCRK7WSF \
  | 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: 6b394ad7f066732490d1255a28abf69152c8ef9d243ba09675372708d770d9a5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5b2ffcdb0cec355f0d3cf9fc52073bc93185f9c69b5620be779d52ca69dd9fba",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-10-31T19:53:47Z",
    "title_canon_sha256": "13fcda1ad1d8b80ac83fe95d0053da6a039286804d07e3d5faaedd487cdee93d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1110.6921",
    "kind": "arxiv",
    "version": 2
  }
}