Pith Number

pith:6BKRTF3A

pith:2006:6BKRTF3A3FOCSVRLFP77ED5GJZ

not attested not anchored not stored refs pending

X-ray spectral properties of high-redshift radio-loud quasars beyond redshift 4--first results

(2) IoA, A.C. Fabian (2), Cambridge), M.A. Worsley (2) R.G. McMahon (2) ((1) YNAO/NAOC, W. Yuan (1)

arxiv:astro-ph/0602272 v1 · 2006-02-13 · 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{6BKRTF3A3FOCSVRLFP77ED5GJZ}

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	2026-07-04T15:49:50.583711Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f055199760d95c29562b2bfff20fa64e663615f3bedafafec00d1b87c7122d3c

Aliases

arxiv: astro-ph/0602272 · arxiv_version: astro-ph/0602272v1 · doi: 10.48550/arxiv.astro-ph/0602272 · pith_short_12: 6BKRTF3A3FOC · pith_short_16: 6BKRTF3A3FOCSVRL · pith_short_8: 6BKRTF3A

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/6BKRTF3A3FOCSVRLFP77ED5GJZ \
  | 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: f055199760d95c29562b2bfff20fa64e663615f3bedafafec00d1b87c7122d3c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d23411fa4fb45a4551d283e15b8e5698fb7ddf267e6d131d928887d7e8653345",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2006-02-13T07:06:48Z",
    "title_canon_sha256": "284b7c4b9500186953ef5bd79626c805a0d2c28517d36460e7f0909454edc724"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0602272",
    "kind": "arxiv",
    "version": 1
  }
}