Pith Number

pith:HPK6JVNH

pith:2018:HPK6JVNHHJIDKOV5IVM2BUNSQB

not attested not anchored not stored refs pending

A compilation of known QSOs for the Gaia mission

Shi-Long Liao, Su-fen Guo, Zhao-Xiang Qi, Zi-Huang Cao

arxiv:1804.08821 v2 · 2018-04-24 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HPK6JVNHHJIDKOV5IVM2BUNSQB}

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	2026-05-17T23:53:31.181997Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3bd5e4d5a73a50353abd4559a0d1b28050355be0838058f4dc52087cccfddabe

Aliases

arxiv: 1804.08821 · arxiv_version: 1804.08821v2 · doi: 10.48550/arxiv.1804.08821 · pith_short_12: HPK6JVNHHJID · pith_short_16: HPK6JVNHHJIDKOV5 · pith_short_8: HPK6JVNH

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/HPK6JVNHHJIDKOV5IVM2BUNSQB \
  | 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: 3bd5e4d5a73a50353abd4559a0d1b28050355be0838058f4dc52087cccfddabe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b8eb0231eded132bde10f93cc73f786ac60408f4332b788071c982a964afcf63",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-04-24T02:55:02Z",
    "title_canon_sha256": "8c4c8cc1bc3c35f8f8c551644070f9f6fb9d2f2c0b0a3d23fb99023a2c979aa9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.08821",
    "kind": "arxiv",
    "version": 2
  }
}