Pith Number

pith:XPQMLSGT

pith:2005:XPQMLSGTGY3HGCWSCITWJLBDYV

not attested not anchored not stored refs pending

Chandra and XMM Observations of Type II Quasars from the SDSS

A. Ptak, D. Schneider, J. Brinkmann, J. Krolik, M. Strauss, N. Zakamska, T. Heckman

arxiv:astro-ph/0510204 v1 · 2005-10-07 · 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{XPQMLSGTGY3HGCWSCITWJLBDYV}

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	2026-07-04T17:15:16.538736Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bbe0c5c8d33636730ad2122764ac23c57e007dcb3a4bef433425de146a91ed66

Aliases

arxiv: astro-ph/0510204 · arxiv_version: astro-ph/0510204v1 · doi: 10.48550/arxiv.astro-ph/0510204 · pith_short_12: XPQMLSGTGY3H · pith_short_16: XPQMLSGTGY3HGCWS · pith_short_8: XPQMLSGT

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/XPQMLSGTGY3HGCWSCITWJLBDYV \
  | 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: bbe0c5c8d33636730ad2122764ac23c57e007dcb3a4bef433425de146a91ed66

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f0f868a33effa989db68b2e8b185f9394740ed8a105f7d3a444dc8c1ed653833",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-10-07T04:44:02Z",
    "title_canon_sha256": "13e196a82907fa24dde476d36ef4b8892abc1f6ab62fafb92e75ea6994e3115f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0510204",
    "kind": "arxiv",
    "version": 1
  }
}