Pith Number

pith:P2ORYAYQ

pith:1995:P2ORYAYQS25FH3AG34BZ2Q74F2

not attested not anchored not stored refs pending

On the nature of the blue giants in NGC 330

Eva K. Grebel, Wm James Roberts, Wolfgang Brandner

arxiv:astro-ph/9512143 v1 · 1995-12-21 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{P2ORYAYQS25FH3AG34BZ2Q74F2}

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	2026-07-04T14:14:40.214757Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7e9d1c031096ba53ec06df039d43fc2e90cfee25d3acc37c1999172ba35bec7c

Aliases

arxiv: astro-ph/9512143 · arxiv_version: astro-ph/9512143v1 · doi: 10.48550/arxiv.astro-ph/9512143 · pith_short_12: P2ORYAYQS25F · pith_short_16: P2ORYAYQS25FH3AG · pith_short_8: P2ORYAYQ

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/P2ORYAYQS25FH3AG34BZ2Q74F2 \
  | 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: 7e9d1c031096ba53ec06df039d43fc2e90cfee25d3acc37c1999172ba35bec7c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "61556650ee6ca49515d3785ed1e82b5b020b1d867ead084be2dd974af4d004be",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1995-12-21T11:42:14Z",
    "title_canon_sha256": "a51024ed112b8a148e22a8b5893a1bde67804ec9f65d6edbd5ebb673c85037e0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9512143",
    "kind": "arxiv",
    "version": 1
  }
}