Pith Number

pith:K5RC5JHW

pith:2009:K5RC5JHWMVG6X6IPUX4UOI53MX

not attested not anchored not stored refs pending

The SDSS/XMM-Newton Quasar Survey: Correlation between X-ray spectral slope and Eddington ratio

G. Risaliti, M. Elvis, M. Young

arxiv:0906.1983 v2 · 2009-06-10 · astro-ph.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{K5RC5JHWMVG6X6IPUX4UOI53MX}

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	2026-05-18T02:13:20.917060Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

57622ea4f6654debf90fa5f94723bb65e30d88301fc7b05a80845df11287eb4c

Aliases

arxiv: 0906.1983 · arxiv_version: 0906.1983v2 · doi: 10.48550/arxiv.0906.1983 · pith_short_12: K5RC5JHWMVG6 · pith_short_16: K5RC5JHWMVG6X6IP · pith_short_8: K5RC5JHW

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/K5RC5JHWMVG6X6IPUX4UOI53MX \
  | 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: 57622ea4f6654debf90fa5f94723bb65e30d88301fc7b05a80845df11287eb4c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "76dcff3e52388a08fb2ada0ca8e0c69bd15489f97d5b5e25636d8f748051c35a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-06-10T18:14:56Z",
    "title_canon_sha256": "bc1eeb81ca72498e140d80a65cd323974917a9665b2f0340379fe4e5c0d35fe5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.1983",
    "kind": "arxiv",
    "version": 2
  }
}