Pith Number

pith:HSBRTSQT

pith:2009:HSBRTSQTP7WAZGKN3GAEZOUVKM

not attested not anchored not stored refs pending

Environments of Nearby Quasars in Sloan Digital Sky Survey

E. Saar, E. Tago, E. Tempel, H. Lietzen, J. Einasto, J. Liivamagi, L. O. Takalo, M. Einasto, M. Gramann, P. Heinamaki, P. Nurmi

arxiv:0904.0558 v1 · 2009-04-03 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HSBRTSQTP7WAZGKN3GAEZOUVKM}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T02:14:07.714207Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3c8319ca137fec0c994dd9804cba955330cbf3fa8a4e3f3e12ca53b791cff498

Aliases

arxiv: 0904.0558 · arxiv_version: 0904.0558v1 · doi: 10.48550/arxiv.0904.0558 · pith_short_12: HSBRTSQTP7WA · pith_short_16: HSBRTSQTP7WAZGKN · pith_short_8: HSBRTSQT

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/HSBRTSQTP7WAZGKN3GAEZOUVKM \
  | 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: 3c8319ca137fec0c994dd9804cba955330cbf3fa8a4e3f3e12ca53b791cff498

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c986cbee727d0ebcc4d5b8685fc17519afecbf7fc342f673119bc0e218964d7e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-04-03T12:20:34Z",
    "title_canon_sha256": "3e79a0b1288aac0dfd80b8933291c49abffb0e918da2025e5a8d28a14eb53df4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.0558",
    "kind": "arxiv",
    "version": 1
  }
}