Pith Number

pith:4RKVDIIU

pith:2016:4RKVDIIUM23SZR4VHKKGZTW7CA

not attested not anchored not stored refs pending

The Canarias Einstein Ring: a Newly Discovered Optical Einstein Ring

Alistair R. Walker, Antonio Aparicio, Frank Valdes, Giampaolo Piotto, Margherita Bettinelli, Matteo Simioni, Santi Cassisi, Sebastian L. Hidalgo

arxiv:1605.03938 v1 · 2016-05-12 · astro-ph.CO · 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{4RKVDIIUM23SZR4VHKKGZTW7CA}

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	2026-05-18T01:14:38.136135Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e45551a11466b72cc7953a946ccedf101bb44591570f33315777ce0192af8109

Aliases

arxiv: 1605.03938 · arxiv_version: 1605.03938v1 · doi: 10.48550/arxiv.1605.03938 · pith_short_12: 4RKVDIIUM23S · pith_short_16: 4RKVDIIUM23SZR4V · pith_short_8: 4RKVDIIU

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/4RKVDIIUM23SZR4VHKKGZTW7CA \
  | 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: e45551a11466b72cc7953a946ccedf101bb44591570f33315777ce0192af8109

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dde7734115de2e252d1a254c337475da98d5bf23b41b305cfd3835f0698a6026",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2016-05-12T19:19:58Z",
    "title_canon_sha256": "9157d11a6cea99a93481a921f8b50200666bbee2609eebe5c05d32bd11d6a84d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1605.03938",
    "kind": "arxiv",
    "version": 1
  }
}