Pith Number

pith:KXJ4PNAN

pith:2021:KXJ4PNANSRZKYMPYU4CH3BKH6Z

not attested not anchored not stored refs pending

A hidden population of high-redshift double quasars unveiled by astrometry

Hsiang-Chih Hwang, Jennifer I-Hsiu Li, Joseph Lazio, Masamune Oguri, Nadia Zakamska, Peter Breiding, Xin Liu, Yu-Ching Chen, Yue Shen

arxiv:2105.03298 v1 · 2021-05-07 · astro-ph.GA · 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{KXJ4PNANSRZKYMPYU4CH3BKH6Z}

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	2026-07-05T03:05:33.622573Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

55d3c7b40d9472ac31f8a7047d8547f6554550ff72dee4b2484a919fb76a5204

Aliases

arxiv: 2105.03298 · arxiv_version: 2105.03298v1 · doi: 10.48550/arxiv.2105.03298 · pith_short_12: KXJ4PNANSRZK · pith_short_16: KXJ4PNANSRZKYMPY · pith_short_8: KXJ4PNAN

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/KXJ4PNANSRZKYMPYU4CH3BKH6Z \
  | 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: 55d3c7b40d9472ac31f8a7047d8547f6554550ff72dee4b2484a919fb76a5204

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "278e1eb210d494079156885fe17d2e246df2383f8f056fbda45da06c40e7c2cf",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-05-07T14:50:26Z",
    "title_canon_sha256": "07aa4666d745d7dc9d6bbcb8922d4caed31db5fa9db5eeafd81353e2588572fe"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2105.03298",
    "kind": "arxiv",
    "version": 1
  }
}