Pith Number

pith:K2EZKCCP

pith:2004:K2EZKCCPILEEFDATX6BQMFC4EL

not attested not anchored not stored refs pending

Dust-reddening and gravitational lensing of SDSS QSOs due to foreground damped Lyman-alpha systems

Cambridge), Garching), J. Liske (ESO, M. T. Murphy (IoA

arxiv:astro-ph/0405472 v2 · 2004-05-25 · 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{K2EZKCCPILEEFDATX6BQMFC4EL}

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	2026-07-04T16:43:49.664509Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

568995084f42c8428c13bf8306145c22f851722059c0f34182ce07e2c5bdec12

Aliases

arxiv: astro-ph/0405472 · arxiv_version: astro-ph/0405472v2 · doi: 10.48550/arxiv.astro-ph/0405472 · pith_short_12: K2EZKCCPILEE · pith_short_16: K2EZKCCPILEEFDAT · pith_short_8: K2EZKCCP

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/K2EZKCCPILEEFDATX6BQMFC4EL \
  | 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: 568995084f42c8428c13bf8306145c22f851722059c0f34182ce07e2c5bdec12

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2804d1d0a4710c98ec24c6f70f86fb2f860759d8c9a87745c094f0bb0999a3b4",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-05-25T06:24:37Z",
    "title_canon_sha256": "ff113716272f5e679379fbfeb9338e2a8bbcf494deca03145a400c6c692446c4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0405472",
    "kind": "arxiv",
    "version": 2
  }
}