Pith Number

pith:SGF4UP73

pith:2010:SGF4UP73W247MBHS7WIHDZVLFW

not attested not anchored not stored refs pending

The Onfp Class in the Magellanic Clouds

12), 4, 4), 6), 8), Anglo-Australian Observatory (5) University of Sheffield (6) Visiting Astronomer, Anthony F. J. Moffat (7, Argentina, Cecilia Farina (9), Cerro Tololo Inter-American Observatory, Chile, Christopher J. Evans (3, European Southern Observatory (7) Universite de Montreal (8) Visiting Astronomer, Guillermo L. Bosch (9, IALP-CONICET (10) Las Campanas Observatory, Ian D. Howarth (2, ICATE-CONICET (12) Visiting Astronomer, Jacco Th. van Loon (13) ((1) Space Telescope Science Institute (2) University College London (3) Royal Observatory Edinburgh (4) Visiting Astronomer, Las Campanas Observatory, National Optical Astronomy Observatory (9) Universidad Nacional de La Plata, Nicole St-Louis (7), Nidia I. Morrell (10), Nolan R. Walborn (1, Observatories of the Carnegie Institution of Washington (11) Universidad de La Serena, Observatories of the Carnegie Institution of Washington (13) Keele University, Paul A. Crowther (5, Rodolfo H. Barba (11, Staffordshire, UK)

arxiv:1001.4032 v1 · 2010-01-22 · 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{SGF4UP73W247MBHS7WIHDZVLFW}

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	2026-05-18T02:09:31.103817Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

918bca3ffbb6b9f604f2fd9071e6ab2d92b90c6c0ac7e43c2652190c950177bf

Aliases

arxiv: 1001.4032 · arxiv_version: 1001.4032v1 · doi: 10.48550/arxiv.1001.4032 · pith_short_12: SGF4UP73W247 · pith_short_16: SGF4UP73W247MBHS · pith_short_8: SGF4UP73

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/SGF4UP73W247MBHS7WIHDZVLFW \
  | 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: 918bca3ffbb6b9f604f2fd9071e6ab2d92b90c6c0ac7e43c2652190c950177bf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4840fd7123175582ab944e6ce1605e6625d847b14de0f29ad7592771edcfc138",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2010-01-22T15:54:51Z",
    "title_canon_sha256": "2e4baf14b7e9f7a218cf69a8caf675a89d283e9e95af79e68cd815bb68f09665"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1001.4032",
    "kind": "arxiv",
    "version": 1
  }
}