Pith Number

pith:YBJT6AKY

pith:2013:YBJT6AKYGNLCE5YMA2FIR3MTRM

not attested not anchored not stored refs pending

The Massive Star Population in M101. I. The Identification and Spatial Distribution of the Visually Luminous Stars

Roberta M. Humphreys, Skyler Grammer

arxiv:1307.7148 v1 · 2013-07-26 · astro-ph.SR · 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{YBJT6AKYGNLCE5YMA2FIR3MTRM}

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	2026-05-18T01:48:33.990852Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c0533f0158335622770c068a88ed938b1dda4e1c4d506bb29dc4381097dd4d2b

Aliases

arxiv: 1307.7148 · arxiv_version: 1307.7148v1 · doi: 10.48550/arxiv.1307.7148 · pith_short_12: YBJT6AKYGNLC · pith_short_16: YBJT6AKYGNLCE5YM · pith_short_8: YBJT6AKY

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/YBJT6AKYGNLCE5YMA2FIR3MTRM \
  | 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: c0533f0158335622770c068a88ed938b1dda4e1c4d506bb29dc4381097dd4d2b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cd2719ee709fcbb217cd168d8772200699b97ad254df7707beda7d0026ab1b37",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2013-07-26T20:00:15Z",
    "title_canon_sha256": "07396f9ad83e829e612fca2968743f1dcf031724797511a52b0c17643caba9a1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.7148",
    "kind": "arxiv",
    "version": 1
  }
}