Pith Number

pith:IXZFO2ZP

pith:1994:IXZFO2ZPWH4RUXJ6SYLXWXE6K5

not attested not anchored not stored refs pending

High-Resolution Imaging of the Gravitational Lens Candidate 1208+1011 with the Nordic Optical Telescope

Frank Grundahl, Jens Hjorth, Kari Nilsson, Leif Festin

arxiv:astro-ph/9412074 v1 · 1994-12-20 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IXZFO2ZPWH4RUXJ6SYLXWXE6K5}

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	2026-05-18T04:21:41.112891Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

45f2576b2fb1f91a5d3e96177b5c9e57787a2f394a6294d70ab04fd79e1c6df3

Aliases

arxiv: astro-ph/9412074 · arxiv_version: astro-ph/9412074v1 · doi: 10.48550/arxiv.astro-ph/9412074 · pith_short_12: IXZFO2ZPWH4R · pith_short_16: IXZFO2ZPWH4RUXJ6 · pith_short_8: IXZFO2ZP

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/IXZFO2ZPWH4RUXJ6SYLXWXE6K5 \
  | 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: 45f2576b2fb1f91a5d3e96177b5c9e57787a2f394a6294d70ab04fd79e1c6df3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0905d41b89b74d753e2a0ee2c1f8f046980dcfa92bbb4212278e41f96cab3f21",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1994-12-20T14:42:00Z",
    "title_canon_sha256": "3b46e5c06721bd4a3d9c9666b47be80a4bc421ae80ca33d9d2a3cc13f621f298"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9412074",
    "kind": "arxiv",
    "version": 1
  }
}