Pith Number

pith:PGSO4EXZ

pith:2008:PGSO4EXZWY4HZTUJIHFZMLGXLP

not attested not anchored not stored refs pending

High resolution spectroscopy for Cepheids distance determination. I. Line asymmetry

A. Merand, D. Bersier, D. Mourard, N. Nardetto, Ph. Mathias, P. Kervella

arxiv:0804.1321 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{PGSO4EXZWY4HZTUJIHFZMLGXLP}

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	2026-07-04T17:10:16.021392Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

79a4ee12f9b6387cce8941cb962cd75bc805b27971dce34f6634e5b76a1d4439

Aliases

arxiv: 0804.1321 · arxiv_version: 0804.1321v1 · doi: 10.48550/arxiv.0804.1321 · pith_short_12: PGSO4EXZWY4H · pith_short_16: PGSO4EXZWY4HZTUJ · pith_short_8: PGSO4EXZ

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/PGSO4EXZWY4HZTUJIHFZMLGXLP \
  | 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: 79a4ee12f9b6387cce8941cb962cd75bc805b27971dce34f6634e5b76a1d4439

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5dac19f9ae4127c20f85e228a48a86a6c7dbf9aeedee2e98ee1544292b4c6a7e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-04-08T16:59:46Z",
    "title_canon_sha256": "5701eac1a3a988e6158b2bee44340cb45c29f17f703e863384decfae7a6151f4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0804.1321",
    "kind": "arxiv",
    "version": 1
  }
}