Pith Number

pith:BIX55LAO

pith:2008:BIX55LAOMJ7OQHRKPLWMECCS2H

not attested not anchored not stored refs pending

High resolution spectroscopy for Cepheids distance determination. II. A period- projection factor relation

A. Fokin, D. Gillet, D. Mourard, N. Nardetto, Ph. Mathias

arxiv:0804.1330 v1 · 2008-04-08 · 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{BIX55LAOMJ7OQHRKPLWMECCS2H}

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	2026-07-04T15:44:46.483417Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0a2fdeac0e627ee81e2a7aecc20852d1fdf4c7eaa0ac1da9785aec39dfcb8e15

Aliases

arxiv: 0804.1330 · arxiv_version: 0804.1330v1 · doi: 10.48550/arxiv.0804.1330 · pith_short_12: BIX55LAOMJ7O · pith_short_16: BIX55LAOMJ7OQHRK · pith_short_8: BIX55LAO

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/BIX55LAOMJ7OQHRKPLWMECCS2H \
  | 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: 0a2fdeac0e627ee81e2a7aecc20852d1fdf4c7eaa0ac1da9785aec39dfcb8e15

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "71ee776c94f7ef3d5a66195381ca7a7be49eeda523ab9fc3baaa276a11008e43",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-04-08T17:07:19Z",
    "title_canon_sha256": "ea7f9bd0062ece56454b2b01ffcb68fbafc456557b155690d90346b6a43b99c9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0804.1330",
    "kind": "arxiv",
    "version": 1
  }
}