Pith Number

pith:GAFCKLBH

pith:2010:GAFCKLBHDU4GSXRZ57XLRWNKBD

not attested not anchored not stored refs pending

Optimal Time-Series Selection of Quasars

Joshua S. Bloom, Nathaniel R. Butler

arxiv:1008.3143 v3 · 2010-08-18 · astro-ph.CO · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GAFCKLBHDU4GSXRZ57XLRWNKBD}

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	2026-05-18T02:05:46.871792Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

300a252c271d38695e39efeeb8d9aa08c597c14cb3a874d4b183054eed61c6f5

Aliases

arxiv: 1008.3143 · arxiv_version: 1008.3143v3 · doi: 10.48550/arxiv.1008.3143 · pith_short_12: GAFCKLBHDU4G · pith_short_16: GAFCKLBHDU4GSXRZ · pith_short_8: GAFCKLBH

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/GAFCKLBHDU4GSXRZ57XLRWNKBD \
  | 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: 300a252c271d38695e39efeeb8d9aa08c597c14cb3a874d4b183054eed61c6f5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b5510a58aa1e0f2dc085e756644f3410b647fe5ff6eeaefbe3a7e6fdd3ea7fe5",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-08-18T18:01:23Z",
    "title_canon_sha256": "085b1036bf97fed8ab9cf5b4cabd5d83b3935a970b586362dc511979af76de96"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1008.3143",
    "kind": "arxiv",
    "version": 3
  }
}