Pith Number

pith:ZXO324DG

pith:2018:ZXO324DG3EH6XNX7K4USCPKI5Q

not attested not anchored not stored refs pending

Discovery of two quasars at $z=5$ from the OGLE Survey

A. P. Ji, A. Rau, A. Udalski, D. M. Skowron, Eduardo Ba\~nados, I. Soszy\'nski, J. Greiner, J. Skowron, K. Rybicki, K. Ulaczyk, {\L}. Wyrzykowski, M. Gromadzki, M. K. Szyma\'nski, N. Morrell, P. Iwanek, P. Mr\'oz, P. Pietrukowicz, R. Poleski, Szymon Koz{\l}owski

arxiv:1810.08622 v1 · 2018-10-19 · 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{ZXO324DG3EH6XNX7K4USCPKI5Q}

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	2026-05-17T23:42:29.099214Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cdddbd7066d90febb6ff5729213d48ec0d4f80c47b39cf41dee1373eee328c07

Aliases

arxiv: 1810.08622 · arxiv_version: 1810.08622v1 · doi: 10.48550/arxiv.1810.08622 · pith_short_12: ZXO324DG3EH6 · pith_short_16: ZXO324DG3EH6XNX7 · pith_short_8: ZXO324DG

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/ZXO324DG3EH6XNX7K4USCPKI5Q \
  | 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: cdddbd7066d90febb6ff5729213d48ec0d4f80c47b39cf41dee1373eee328c07

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0de8d713166a8aa9d2e7022950b9e002676e58a0d739b0d0b34549065707a6a9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-10-19T18:00:01Z",
    "title_canon_sha256": "9c05cf349c6a752edcdd64eae1276d65ab7a3880d2e78962986400b89408e7e0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.08622",
    "kind": "arxiv",
    "version": 1
  }
}