Pith Number

pith:ZY4V3NHK

pith:2015:ZY4V3NHKMIJIVFWQ6RIWDQ3QYJ

not attested not anchored not stored refs pending

Ultrafaint Dwarf Galaxies - the lowest mass relics from before reionization

David Webster, Joss Bland-Hawthorn, Ralph Sutherland

arxiv:1505.06209 v2 · 2015-05-22 · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZY4V3NHKMIJIVFWQ6RIWDQ3QYJ}

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	2026-05-18T01:36:53.335951Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ce395db4ea62128a96d0f45161c370c268732067a7e3f5a37362fab70da0d0d7

Aliases

arxiv: 1505.06209 · arxiv_version: 1505.06209v2 · doi: 10.48550/arxiv.1505.06209 · pith_short_12: ZY4V3NHKMIJI · pith_short_16: ZY4V3NHKMIJIVFWQ · pith_short_8: ZY4V3NHK

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/ZY4V3NHKMIJIVFWQ6RIWDQ3QYJ \
  | 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: ce395db4ea62128a96d0f45161c370c268732067a7e3f5a37362fab70da0d0d7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "02ffc940bb598e7c45a2bf5ffeeb5565dc425b1ca9b25bb1f94e01c2dc093594",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-05-22T20:00:52Z",
    "title_canon_sha256": "cbcfbb69f72f8ca235e1d4ec3733d69f074c74b2578bb0b23cae806b3d1c0504"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.06209",
    "kind": "arxiv",
    "version": 2
  }
}