Pith Number

pith:UQS3ULSJ

pith:2008:UQS3ULSJINI4AITD55ONQRBTCE

not attested not anchored not stored refs pending

A sharp look at the gravitationally lensed quasar SDSS J0806+2006 with Laser Guide Star Adaptive Optics

A. Eigenbrod, D. Sluse, Ecole Polytechnique F\'ed\'erale de Lausanne-EPFL), F. Courbin, G. Meylan (Laboratoire d'astrophysique

arxiv:0809.2980 v2 · 2008-09-17 · 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{UQS3ULSJINI4AITD55ONQRBTCE}

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	2026-07-04T15:33:25.652310Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a425ba2e494351c02263ef5cd844331123f0ce4ec4401b198386b3fe6020125b

Aliases

arxiv: 0809.2980 · arxiv_version: 0809.2980v2 · doi: 10.48550/arxiv.0809.2980 · pith_short_12: UQS3ULSJINI4 · pith_short_16: UQS3ULSJINI4AITD · pith_short_8: UQS3ULSJ

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/UQS3ULSJINI4AITD55ONQRBTCE \
  | 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: a425ba2e494351c02263ef5cd844331123f0ce4ec4401b198386b3fe6020125b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4623e188fd0cc754c4ba4f9bfa8c381c6be6ebb996e07328bdb524213c50bbf8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-09-17T19:08:21Z",
    "title_canon_sha256": "c6f82e5cf6e2743971ad0243abee300d7efcbe89a7de542f88f414c817c64084"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.2980",
    "kind": "arxiv",
    "version": 2
  }
}