Pith Number

pith:OKACSNQF

pith:1996:OKACSNQFQ32DME24BAZTPRIB43

not attested not anchored not stored refs pending

Determining the Hubble Constant from the Gravitational Lens PG 1115+080

C. R. Keeton, C. S. Kochanek (Harvard-Smithsonian Center for Astrophysics)

arxiv:astro-ph/9611216 v2 · 1996-11-26 · 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{OKACSNQFQ32DME24BAZTPRIB43}

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.

Cited by

1 paper in Pith

The Hubble Tension and Early Dark Energy

Receipt and verification

First computed	2026-07-04T16:00:19.506432Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

728029360586f436135c083337c501e6cd92be22c890537172013263dce0b45a

Aliases

arxiv: astro-ph/9611216 · arxiv_version: astro-ph/9611216v2 · doi: 10.48550/arxiv.astro-ph/9611216 · pith_short_12: OKACSNQFQ32D · pith_short_16: OKACSNQFQ32DME24 · pith_short_8: OKACSNQF

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/OKACSNQFQ32DME24BAZTPRIB43 \
  | 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: 728029360586f436135c083337c501e6cd92be22c890537172013263dce0b45a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c9d429aeb81eea21ab6cac297b800c9c81c34d6ef752335a72db047581d6162b",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1996-11-26T17:34:30Z",
    "title_canon_sha256": "d9d7b13b04398c28d1af8d882af031143e3e59f372b0634d8d2c10329db305e5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9611216",
    "kind": "arxiv",
    "version": 2
  }
}