Pith Number

pith:YZETRFQY

pith:2011:YZETRFQYA7U2TQO5VEVBCHJUFS

not attested not anchored not stored refs pending

Spectral Classification of O2-3.5If*/WN5-7 stars

Nolan Walborn (STScI), Paul Crowther (Sheffield)

arxiv:1105.4757 v1 · 2011-05-24 · 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{YZETRFQYA7U2TQO5VEVBCHJUFS}

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	2026-05-18T02:01:51.764432Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c64938961807e9a9c1dda92a111d342c9d679e3ae51797439276e5070faaf52c

Aliases

arxiv: 1105.4757 · arxiv_version: 1105.4757v1 · doi: 10.48550/arxiv.1105.4757 · pith_short_12: YZETRFQYA7U2 · pith_short_16: YZETRFQYA7U2TQO5 · pith_short_8: YZETRFQY

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/YZETRFQYA7U2TQO5VEVBCHJUFS \
  | 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: c64938961807e9a9c1dda92a111d342c9d679e3ae51797439276e5070faaf52c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3eadb0d1b25e84ec19ed5c3f8dc1f02bce37ad312063d2355d5d57602fa6a9a0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2011-05-24T13:10:12Z",
    "title_canon_sha256": "10549e489e6116a888fd179c21bd2dd0e11321201bde3eb18bf6e5be410b315b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1105.4757",
    "kind": "arxiv",
    "version": 1
  }
}