Pith Number

pith:PPZ7LGN2

pith:2006:PPZ7LGN2EYJDX265YBYDLWLGLH

not attested not anchored not stored refs pending

Analysis of IUE spectra of helium-rich white dwarf stars

B. G. Castanheira, D. Koester, G. Handler, S. O. Kepler

arxiv:astro-ph/0602169 v1 · 2006-02-07 · 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{PPZ7LGN2EYJDX265YBYDLWLGLH}

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	2026-07-04T16:57:56.500684Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7bf3f599ba26123bebddc07035d96659c951cf98610b0a442ba5f2574f3f7c21

Aliases

arxiv: astro-ph/0602169 · arxiv_version: astro-ph/0602169v1 · doi: 10.48550/arxiv.astro-ph/0602169 · pith_short_12: PPZ7LGN2EYJD · pith_short_16: PPZ7LGN2EYJDX265 · pith_short_8: PPZ7LGN2

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/PPZ7LGN2EYJDX265YBYDLWLGLH \
  | 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: 7bf3f599ba26123bebddc07035d96659c951cf98610b0a442ba5f2574f3f7c21

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c16aa09099de89c6abfd65023cfa58f43eec3514338c66d0261517610ed57bb7",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2006-02-07T21:06:50Z",
    "title_canon_sha256": "9471700c7e91327b6c60b1faed3d035ce77b538c72ffc0b1ac4bd60d3b2d49f7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0602169",
    "kind": "arxiv",
    "version": 1
  }
}