Pith Number

pith:BUT6QB3A

pith:2018:BUT6QB3ADEPSEBYSWCXP7RE47J

not attested not anchored not stored refs pending

Gaia GraL II - Gaia DR2 Gravitational Lens Systems: The Known Multiply Imaged Quasars

A. Krone-Martins, C. Ducourant, E. Slezak, F. Mignard, J.-F. Le Campion, J. Kl\"uter, J. Surdej, J. Wambsganss, L. Delchambre, L. Galluccio, M.J. Graham, O. Wertz, R. Teixeira, S.G. Djorgovski, U. Bastian

arxiv:1805.07359 v1 · 2018-05-18 · astro-ph.IM · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BUT6QB3ADEPSEBYSWCXP7RE47J}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T00:03:05.755497Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0d27e80760191f220712b0aeffc49cfa68c637dbaf35e7302890410181447c19

Aliases

arxiv: 1805.07359 · arxiv_version: 1805.07359v1 · doi: 10.48550/arxiv.1805.07359 · pith_short_12: BUT6QB3ADEPS · pith_short_16: BUT6QB3ADEPSEBYS · pith_short_8: BUT6QB3A

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/BUT6QB3ADEPSEBYSWCXP7RE47J \
  | 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: 0d27e80760191f220712b0aeffc49cfa68c637dbaf35e7302890410181447c19

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "08917e7cb1aebbff416614b0a73d156127c77c80032d89e1b2aa0f68845e5380",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2018-05-18T17:37:57Z",
    "title_canon_sha256": "21f4fcdac310bd7d4699127eabea180b0579ffdf8f04c28beb270d4e1b03c432"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.07359",
    "kind": "arxiv",
    "version": 1
  }
}