Pith Number

pith:7I523YC6

pith:1998:7I523YC6JFKQL7AADMTAFA2LXX

not attested not anchored not stored refs pending

The Infrared Einstein Ring in the Gravitational Lens MG1131+0456 and the Death of the Dusty Lens Hypothesis

B. A. McLeod (1), C. D. Impey (2), C. R. Keeton (2), C. S. Kochanek (1), C. Y. Peng (2) ((1) Harvard-Smithsonian Center for Astrophysics (2) Steward Observatory), E.E. Falco (2), H.-W. Rix (2), J. Lehar (1)

arxiv:astro-ph/9809371 v1 · 1998-09-29 · 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{7I523YC6JFKQL7AADMTAFA2LXX}

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	2026-07-04T14:16:03.844599Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fa3bade05e495505fc001b2602834bbde51ba5afcd88c92e0c101c444c3ce937

Aliases

arxiv: astro-ph/9809371 · arxiv_version: astro-ph/9809371v1 · doi: 10.48550/arxiv.astro-ph/9809371 · pith_short_12: 7I523YC6JFKQ · pith_short_16: 7I523YC6JFKQL7AA · pith_short_8: 7I523YC6

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/7I523YC6JFKQL7AADMTAFA2LXX \
  | 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: fa3bade05e495505fc001b2602834bbde51ba5afcd88c92e0c101c444c3ce937

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0f75cb5a95ddb81d1a18ddf330f797e9beebf210abcfcc08e6c1155aae49e0c8",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-09-29T20:07:00Z",
    "title_canon_sha256": "e1fd97bf42f0e6387bfa15ce08e67ff3418f530c5ddfc6950710b9af191239b4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9809371",
    "kind": "arxiv",
    "version": 1
  }
}