Pith Number

pith:GKIQYCDH

pith:2003:GKIQYCDHQBJYF5ZKR2KA2UZXUI

not attested not anchored not stored refs pending

Blue Supergiants as a Tool for Extragalactic Distances - Theoretical Concepts

Hawaii), Norbert Przybilla (IfA, Rolf-Peter Kudritzki

arxiv:astro-ph/0301621 v1 · 2003-01-30 · 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{GKIQYCDHQBJYF5ZKR2KA2UZXUI}

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	2026-05-18T01:40:39.444194Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

32910c0867805382f72a8e940d5337a21bdef5a6941f0101fb2e3035530789c5

Aliases

arxiv: astro-ph/0301621 · arxiv_version: astro-ph/0301621v1 · doi: 10.48550/arxiv.astro-ph/0301621 · pith_short_12: GKIQYCDHQBJY · pith_short_16: GKIQYCDHQBJYF5ZK · pith_short_8: GKIQYCDH

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/GKIQYCDHQBJYF5ZKR2KA2UZXUI \
  | 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: 32910c0867805382f72a8e940d5337a21bdef5a6941f0101fb2e3035530789c5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "531c58f34c497870d18045392a69a9ff95c7fff26a8865719a6173fb5617fa05",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-01-30T22:32:34Z",
    "title_canon_sha256": "4a2d3001ef48a370c5ca5cfb99117e654f2024a15f6b815117e50f0f3fb0ee3d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0301621",
    "kind": "arxiv",
    "version": 1
  }
}