Pith Number

pith:B6IYDOJU

pith:2005:B6IYDOJUOP2KHO4G7SB2GGKVF5

not attested not anchored not stored refs pending

An analysis of ultraviolet spectra of Extreme Helium Stars and new clues to their origins

(2) UT Austin, (3) Armagh Observatory), C. Simon Jeffery (3), David L. Lambert (2), Gajendra Pandey (1), N. Kameswara Rao (1) ((1) IIA Bangalore

arxiv:astro-ph/0510161 v1 · 2005-10-06 · 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{B6IYDOJUOP2KHO4G7SB2GGKVF5}

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	2026-05-18T01:07:25.844290Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0f9181b93473f4a3bb86fc83a319552f7b25352f1d8b22e2dde550812c8a8669

Aliases

arxiv: astro-ph/0510161 · arxiv_version: astro-ph/0510161v1 · doi: 10.48550/arxiv.astro-ph/0510161 · pith_short_12: B6IYDOJUOP2K · pith_short_16: B6IYDOJUOP2KHO4G · pith_short_8: B6IYDOJU

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/B6IYDOJUOP2KHO4G7SB2GGKVF5 \
  | 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: 0f9181b93473f4a3bb86fc83a319552f7b25352f1d8b22e2dde550812c8a8669

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7d44c4c3f8f860a43df112fd6ba94e02d864061481a7fcc8a94a1c458210a5ec",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-10-06T07:30:40Z",
    "title_canon_sha256": "804083729da2cc64eaac11655e4d87b4e09a8edef6922248e0122650aaf30d99"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0510161",
    "kind": "arxiv",
    "version": 1
  }
}