Pith Number

pith:NJ2WB4Y4

pith:1998:NJ2WB4Y4JXKO6RN76WZ4UVSW6X

not attested not anchored not stored refs pending

Comparison of two different extinction laws with Hipparcos observations

Bernard Valette, Bing Chen, Giovanni Carraro, Jean Luc Vergely

arxiv:astro-ph/9805018 v1 · 1998-05-04 · 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{NJ2WB4Y4JXKO6RN76WZ4UVSW6X}

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.

Cited by

1 paper in Pith

Unveiling the nature of barium stars. I. Asteroseismic masses and the evolutionary link between Ba dwarfs and giants

Receipt and verification

First computed	2026-07-04T14:15:47.355459Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6a7560f31c4dd4ef45bff5b3ca5656f5fe3860408f1905a95b7975d02da9135f

Aliases

arxiv: astro-ph/9805018 · arxiv_version: astro-ph/9805018v1 · doi: 10.48550/arxiv.astro-ph/9805018 · pith_short_12: NJ2WB4Y4JXKO · pith_short_16: NJ2WB4Y4JXKO6RN7 · pith_short_8: NJ2WB4Y4

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/NJ2WB4Y4JXKO6RN76WZ4UVSW6X \
  | 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: 6a7560f31c4dd4ef45bff5b3ca5656f5fe3860408f1905a95b7975d02da9135f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "00c0ca4b4c648f415750ffead788d39281ecf66f47c5e63f191b3f25a55bad4a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-05-04T12:07:42Z",
    "title_canon_sha256": "80b63b084a59fe7da7354e22cf01ed499247031a482a51f152ffab253142c70f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9805018",
    "kind": "arxiv",
    "version": 1
  }
}