Pith Number

pith:FFGRSKT5

pith:2012:FFGRSKT57PBZAIQXBVLYM222AQ

not attested not anchored not stored refs pending

A Two-Year Time Delay for the Lensed Quasar SDSS J1029+2623

Christopher S. Kochanek, Emilio E. Falco, Janine Fohlmeister, Joachim Wambsganss, Masamune Oguri, Xinyu Dai

arxiv:1207.5776 v2 · 2012-07-24 · 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{FFGRSKT57PBZAIQXBVLYM222AQ}

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	2026-05-18T03:34:16.135802Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

294d192a7dfbc39022170d57866b5a041dcaf1bc478becbf327657ec2e220160

Aliases

arxiv: 1207.5776 · arxiv_version: 1207.5776v2 · doi: 10.48550/arxiv.1207.5776 · pith_short_12: FFGRSKT57PBZ · pith_short_16: FFGRSKT57PBZAIQX · pith_short_8: FFGRSKT5

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/FFGRSKT57PBZAIQXBVLYM222AQ \
  | 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: 294d192a7dfbc39022170d57866b5a041dcaf1bc478becbf327657ec2e220160

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dbef62cb6bcda6c0a93ee6da9ecb1a08882aaca6eebb83b13efb2593316eef2c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-07-24T19:10:47Z",
    "title_canon_sha256": "4645a70cbfc7b40722ef3ea89ce509996825386d59923f210b88408a791769a5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.5776",
    "kind": "arxiv",
    "version": 2
  }
}