Pith Number

pith:VMH6TFKJ

pith:2006:VMH6TFKJWQNKNEURAY4E2TJGKI

not attested not anchored not stored refs pending

Quasars Probing Quasars I: Optically Thick Absorbers Near Luminous Quasars

David J. Schlegel, Donald P. Schneider, Gordon T. Richards, James E. Gunn, Jason X. Prochaska, Jon Brinkmann, Joseph F. Hennawi, Masamune Oguri, Michael A. Strauss, Nadia L. Zakamska, Robert H. Lupton, Robert J. Brunner, Scott Burles, Xiaohui Fan

arxiv:astro-ph/0603742 v2 · 2006-03-28 · 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{VMH6TFKJWQNKNEURAY4E2TJGKI}

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	2026-05-18T04:29:04.888888Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ab0fe99549b41aa6929106384d4d2652106916808a6773ba2f29e364caed0818

Aliases

arxiv: astro-ph/0603742 · arxiv_version: astro-ph/0603742v2 · doi: 10.48550/arxiv.astro-ph/0603742 · pith_short_12: VMH6TFKJWQNK · pith_short_16: VMH6TFKJWQNKNEUR · pith_short_8: VMH6TFKJ

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/VMH6TFKJWQNKNEURAY4E2TJGKI \
  | 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: ab0fe99549b41aa6929106384d4d2652106916808a6773ba2f29e364caed0818

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8dfccd9a80f177bc42ef5b88801e56c6095728787ce68f210479dce17aa41b12",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2006-03-28T20:07:04Z",
    "title_canon_sha256": "a0fc2c06314a0d8a1d6ca7b8726825082a38f324d5389976e1369fdd707f3b50"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0603742",
    "kind": "arxiv",
    "version": 2
  }
}