Pith Number

pith:QBVURGJR

pith:2018:QBVURGJR54YQ2YZSDUAH4AV2MT

not attested not anchored not stored refs pending

The Galactic WC and WO stars: The impact of revised distances from Gaia DR2 and their role as massive black hole progenitors

Andreas A.C. Sander, Helge Todt, Lidia M. Oskinova, Rainer Hainich, Tomer Shenar, Varsha Ramachandran, Wolf-Rainer Hamann

arxiv:1807.04293 v3 · 2018-07-11 · astro-ph.GA · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QBVURGJR54YQ2YZSDUAH4AV2MT}

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	2026-05-17T23:56:20.470582Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

806b489931ef310d63321d007e02ba64e11c96f4e473eeee21f17ff6d2596847

Aliases

arxiv: 1807.04293 · arxiv_version: 1807.04293v3 · doi: 10.48550/arxiv.1807.04293 · pith_short_12: QBVURGJR54YQ · pith_short_16: QBVURGJR54YQ2YZS · pith_short_8: QBVURGJR

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/QBVURGJR54YQ2YZSDUAH4AV2MT \
  | 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: 806b489931ef310d63321d007e02ba64e11c96f4e473eeee21f17ff6d2596847

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e7b516c4357dc3ffba6456dad78f5611eaf48953d36eb24f64689118d728f75d",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-07-11T18:00:07Z",
    "title_canon_sha256": "fbc10620672c0654bc2ff9772e3caa3b0f349c8aa0203b23dd31ca29c9592200"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.04293",
    "kind": "arxiv",
    "version": 3
  }
}