Pith Number

pith:UMGNPA6B

pith:2009:UMGNPA6BGPNONEIWDLYTZX2LL6

not attested not anchored not stored refs pending

Improved Constraints on the Gravitational Lens Q0957+561. I. Weak Lensing

C.R. Keeton, G.M. Bernstein, R. Fadely, R. Nakajima, T. Schrabback

arxiv:0903.4182 v3 · 2009-03-24 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UMGNPA6BGPNONEIWDLYTZX2LL6}

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	2026-05-18T04:29:15.658189Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a30cd783c133dae691161af13cdf4b5fbc384cf41b9ea67ffeb0fcc189f627cf

Aliases

arxiv: 0903.4182 · arxiv_version: 0903.4182v3 · doi: 10.48550/arxiv.0903.4182 · pith_short_12: UMGNPA6BGPNO · pith_short_16: UMGNPA6BGPNONEIW · pith_short_8: UMGNPA6B

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/UMGNPA6BGPNONEIWDLYTZX2LL6 \
  | 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: a30cd783c133dae691161af13cdf4b5fbc384cf41b9ea67ffeb0fcc189f627cf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1ae1c6141309c23225b4561ce1a9ced2512ff6c92277a43eb101b2369ac57601",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-03-24T20:42:05Z",
    "title_canon_sha256": "bc91d7fbe1b20531bdd9aa235d6eac9a3f43bfa4955c35df4b409a5b42c4f0d3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.4182",
    "kind": "arxiv",
    "version": 3
  }
}