Pith Number

pith:PCI4JKU7

pith:2006:PCI4JKU7GAAEKBH3OJI2KCHT3K

not attested not anchored not stored refs pending

Photometric Selection of QSO Candidates From GALEX Sources

Andrew Gould, David W. Atlee

arxiv:astro-ph/0611820 v3 · 2006-11-28 · 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{PCI4JKU7GAAEKBH3OJI2KCHT3K}

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	2026-05-18T04:29:15.187608Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7891c4aa9f30004504fb7251a508f3daaee246e8fd37c7e8dfe91d0d342f2b44

Aliases

arxiv: astro-ph/0611820 · arxiv_version: astro-ph/0611820v3 · doi: 10.48550/arxiv.astro-ph/0611820 · pith_short_12: PCI4JKU7GAAE · pith_short_16: PCI4JKU7GAAEKBH3 · pith_short_8: PCI4JKU7

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/PCI4JKU7GAAEKBH3OJI2KCHT3K \
  | 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: 7891c4aa9f30004504fb7251a508f3daaee246e8fd37c7e8dfe91d0d342f2b44

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3e71a31cb28a442c015ae178e08c7b8d3c423f4e9ac193c4fe73a0e6b4a9c009",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2006-11-28T14:59:54Z",
    "title_canon_sha256": "4d6ccc50c823d97f125f88151fec7f5c84595149551e447012cfaa8a426f8354"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0611820",
    "kind": "arxiv",
    "version": 3
  }
}