Pith Number

pith:S6GHBIU6

pith:2009:S6GHBIU6KCNU3PZTQVV4ZZGFZA

not attested not anchored not stored refs pending

Massive star formation in Wolf-Rayet galaxies: II. Optical spectroscopy results

Angel R. Lopez-Sanchez, Cesar Esteban

arxiv:0910.1578 v1 · 2009-10-08 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{S6GHBIU6KCNU3PZTQVV4ZZGFZA}

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	2026-05-18T02:11:25.440026Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

978c70a29e509b4dbf33856bcce4c5c80c7c839a0a842082b257bec1b20c7044

Aliases

arxiv: 0910.1578 · arxiv_version: 0910.1578v1 · doi: 10.48550/arxiv.0910.1578 · pith_short_12: S6GHBIU6KCNU · pith_short_16: S6GHBIU6KCNU3PZT · pith_short_8: S6GHBIU6

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/S6GHBIU6KCNU3PZTQVV4ZZGFZA \
  | 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: 978c70a29e509b4dbf33856bcce4c5c80c7c839a0a842082b257bec1b20c7044

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b5533bb62745408bdf6a563d8ee04d70bbe8fa14498e3c942460b658265def97",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-10-08T19:59:15Z",
    "title_canon_sha256": "a946a73b2abe65bee68771628c05c9371c2b3568271530871c5de53b1fa13351"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.1578",
    "kind": "arxiv",
    "version": 1
  }
}