Pith Number

pith:NDE7QOK4

pith:2018:NDE7QOK466TKPSHZ5WW2VF7NHL

not attested not anchored not stored refs pending

A Gravitationally Lensed Quasar Discovered in OGLE

A. Udalski, C. Lemon, I. Soszy\'nski, J. Bolmer, J. Greiner, J. Skowron, K. Ulaczyk, {\L}. Wyrzykowski, M. K. Szyma\'nski, M. Pawlak, M. W. Auger, P. Mr\'oz, P. Pietrukowicz, R. Poleski, S. Koz{\l}owski, T. Anguita, Y. Apostolovski, Z. Kostrzewa-Rutkowska

arxiv:1801.08481 v1 · 2018-01-25 · 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{NDE7QOK466TKPSHZ5WW2VF7NHL}

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	2026-05-18T00:23:27.311779Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

68c9f8395cf7a6a7c8f9edadaa97ed3afe3c57582ba094181bf662cb6e0205af

Aliases

arxiv: 1801.08481 · arxiv_version: 1801.08481v1 · doi: 10.48550/arxiv.1801.08481 · pith_short_12: NDE7QOK466TK · pith_short_16: NDE7QOK466TKPSHZ · pith_short_8: NDE7QOK4

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/NDE7QOK466TKPSHZ5WW2VF7NHL \
  | 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: 68c9f8395cf7a6a7c8f9edadaa97ed3afe3c57582ba094181bf662cb6e0205af

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f5480add458c74d4201610374ac7e6c7d66645bfb6abc20a69586b6403e3d746",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-01-25T16:54:36Z",
    "title_canon_sha256": "729b24b29ebe6daf0d13ace8beb73746e79b05384379fb0196a6a7a2a6441ec6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.08481",
    "kind": "arxiv",
    "version": 1
  }
}