Pith Number

pith:L7F2SPPA

pith:2012:L7F2SPPAB7AU33LYHJ64IOY4AD

not attested not anchored not stored refs pending

Time delay between images of the lensed quasar UM673

A.A. Sergeyev, A.S. Gusev, B.P Artamonov, E. Koptelova, M.A. Ibragimov, O. Burkhonov, O.V. Ezhkova, Sh.A. Ehgamberdiev, S.N. Nuritdinov, T. Akhunov, T. Chiueh, V.L. Oknyanskij, V.V. Bruevich, W. P. Chen

arxiv:1204.5396 v2 · 2012-04-24 · 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{L7F2SPPAB7AU33LYHJ64IOY4AD}

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	2026-05-18T01:57:46.736673Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5fcba93de00fc14ded783a7dc43b1c00e6b0dcf1ae474db96f5ddd5a91a61948

Aliases

arxiv: 1204.5396 · arxiv_version: 1204.5396v2 · doi: 10.48550/arxiv.1204.5396 · pith_short_12: L7F2SPPAB7AU · pith_short_16: L7F2SPPAB7AU33LY · pith_short_8: L7F2SPPA

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/L7F2SPPAB7AU33LYHJ64IOY4AD \
  | 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: 5fcba93de00fc14ded783a7dc43b1c00e6b0dcf1ae474db96f5ddd5a91a61948

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "16872e1041a5279979231e38a6c518848cac0009cdd324231f788a3dc2415f73",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-04-24T14:57:41Z",
    "title_canon_sha256": "948aae3110b4623745a74a9f1f39af17652e9afb7a4bd7d0ee977c70df5e7418"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.5396",
    "kind": "arxiv",
    "version": 2
  }
}