Pith Number

pith:NM4LD2LZ

pith:2011:NM4LD2LZHLOQET7MRNDGDDP7EH

not attested not anchored not stored refs pending

And the winner is: galaxy mass

Daniel Thomas (ICG, Portsmouth)

arxiv:1102.5099 v1 · 2011-02-24 · 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{NM4LD2LZHLOQET7MRNDGDDP7EH}

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	2026-05-18T02:03:05.182433Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6b38b1e9793add024fec8b46618dff21f38c2964e9ec6c5c3a28d264179b1067

Aliases

arxiv: 1102.5099 · arxiv_version: 1102.5099v1 · doi: 10.48550/arxiv.1102.5099 · pith_short_12: NM4LD2LZHLOQ · pith_short_16: NM4LD2LZHLOQET7M · pith_short_8: NM4LD2LZ

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/NM4LD2LZHLOQET7MRNDGDDP7EH \
  | 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: 6b38b1e9793add024fec8b46618dff21f38c2964e9ec6c5c3a28d264179b1067

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "98a880bd8016617d6129f4a6483d113c62e1994b3ddda18cff4fbb5a2d29eead",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-02-24T21:00:17Z",
    "title_canon_sha256": "165a7f9f9aadfc332a934705ec536f01efc73dae0f8b614b84672e1b778cff34"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.5099",
    "kind": "arxiv",
    "version": 1
  }
}