Pith Number

pith:BBQMCWGJ

pith:2019:BBQMCWGJJNWA7FSKVXWV54C23T

not attested not anchored not stored refs pending

A measurement of the Hubble constant from angular diameter distances to two gravitational lenses

Christopher D. Fassnacht, Eiichiro Komatsu, Inh Jee, L\'eon V. E. Koopmans, Sherry Suyu, Stefan Hilbert

arxiv:1909.06712 v1 · 2019-09-15 · 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{BBQMCWGJJNWA7FSKVXWV54C23T}

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	2026-07-05T00:04:48.906253Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0860c158c94b6c0f964aaded5ef05adce0bbe53be4957c03de464c6150deb5cc

Aliases

arxiv: 1909.06712 · arxiv_version: 1909.06712v1 · doi: 10.48550/arxiv.1909.06712 · pith_short_12: BBQMCWGJJNWA · pith_short_16: BBQMCWGJJNWA7FSK · pith_short_8: BBQMCWGJ

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/BBQMCWGJJNWA7FSKVXWV54C23T \
  | 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: 0860c158c94b6c0f964aaded5ef05adce0bbe53be4957c03de464c6150deb5cc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2b7c6cdc8d02a8a97b8e34227a69e085cc50a7299cd210dac490bb68465f7d4d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2019-09-15T02:11:00Z",
    "title_canon_sha256": "1362275e9c9a6aa108be29d1cef8bbf6cfd3a309a9aea1a3dd35e8a04e7e6979"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1909.06712",
    "kind": "arxiv",
    "version": 1
  }
}