Pith Number

pith:RREW47HZ

pith:2009:RREW47HZFNDCXETIZVPAVY5GPE

not attested not anchored not stored refs pending

Measuring the Hubble Constant with the Hubble Space Telescope

J. Mould, R. Kennicutt, W. Freedman

arxiv:0910.5775 v1 · 2009-10-30 · 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{RREW47HZFNDCXETIZVPAVY5GPE}

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	2026-05-18T02:11:01.533416Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8c496e7cf92b462b9268cd5e0ae3a67911b36ee84fee852c6b0d4658c34a0783

Aliases

arxiv: 0910.5775 · arxiv_version: 0910.5775v1 · doi: 10.48550/arxiv.0910.5775 · pith_short_12: RREW47HZFNDC · pith_short_16: RREW47HZFNDCXETI · pith_short_8: RREW47HZ

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/RREW47HZFNDCXETIZVPAVY5GPE \
  | 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: 8c496e7cf92b462b9268cd5e0ae3a67911b36ee84fee852c6b0d4658c34a0783

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1a697e9b6a952f75541270436110f914256f0d7b147d96e672ee97bf6dfdc5c1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-10-30T03:02:26Z",
    "title_canon_sha256": "2ca6819382c51ee566bb31b8d6df333fcf57766d3aa8ed89ced36a1d6c1828d1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.5775",
    "kind": "arxiv",
    "version": 1
  }
}