Pith Number

pith:27IGUEOO

pith:2005:27IGUEOOXU5QGTNETBGPLQC4RC

not attested not anchored not stored refs pending

The correlation of the Lyman-alpha forest and metals in close pairs of hight-redshift quasars

B. Carswell, C. Pichon, E. Rollinde, F. Coppolani, F. Stoehr, M. Haehnelt, P. Petitjean, R. Teyssier, S. Colombi

arxiv:astro-ph/0509608 v1 · 2005-09-20 · 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{27IGUEOOXU5QGTNETBGPLQC4RC}

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	2026-07-04T14:47:37.176201Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d7d06a11cebd3b034da4984cf5c05c889dcb8121036125147b13644590cc57c1

Aliases

arxiv: astro-ph/0509608 · arxiv_version: astro-ph/0509608v1 · doi: 10.48550/arxiv.astro-ph/0509608 · pith_short_12: 27IGUEOOXU5Q · pith_short_16: 27IGUEOOXU5QGTNE · pith_short_8: 27IGUEOO

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/27IGUEOOXU5QGTNETBGPLQC4RC \
  | 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: d7d06a11cebd3b034da4984cf5c05c889dcb8121036125147b13644590cc57c1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "20167dfbe2f0d0edd91be7c1f9db340a618fb9d4178687873c84242f20f65704",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-09-20T21:45:38Z",
    "title_canon_sha256": "405bc744113c15e73345a4777c48428c900a392101e03602fd52c7b6fa8df595"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0509608",
    "kind": "arxiv",
    "version": 1
  }
}