Pith Number

pith:XXB5KC76

pith:2018:XXB5KC765FRJPM6Z424LKQAMND

not attested not anchored not stored refs pending

Hubble Space Telescope FUV observations of M31's globular clusters suggest a spatially homogeneous helium-enriched sub population

Andrea Dieball, Arunav Kundu, Christian Knigge, Jay Strader, Mark Peacock, Stephen Zepf, Thomas Maccarone

arxiv:1809.02626 v1 · 2018-09-07 · 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{XXB5KC765FRJPM6Z424LKQAMND}

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	2026-05-18T00:05:27.708325Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bdc3d50bfee96297b3d9e6b8b5400c68d7d8fc7195711bd6a5d1dcc2015a2260

Aliases

arxiv: 1809.02626 · arxiv_version: 1809.02626v1 · doi: 10.48550/arxiv.1809.02626 · pith_short_12: XXB5KC765FRJ · pith_short_16: XXB5KC765FRJPM6Z · pith_short_8: XXB5KC76

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/XXB5KC765FRJPM6Z424LKQAMND \
  | 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: bdc3d50bfee96297b3d9e6b8b5400c68d7d8fc7195711bd6a5d1dcc2015a2260

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "40a263f1e02e705101c4ea7bd03926dcf454e2cec9116fe204e3338c035adfb6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-09-07T18:12:40Z",
    "title_canon_sha256": "af54707906c5c8cbc848ce2b682df1c7b606b5654ddf71b19b0c48a3d4fa310c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.02626",
    "kind": "arxiv",
    "version": 1
  }
}