Pith Number

pith:6F7L6UF4

pith:1999:6F7L6UF47HBATXJQJELIFN5OLO

not attested not anchored not stored refs pending

The HST Key Project on the Extragalactic Distance Scale XXVI. The Calibration of Population II Secondary Distance Indicators and the Value of the Hubble Constant

Barry F. Madore, Brad K. Gibson, Daniel D. Kelson, Garth D. Illingworth, Holland C. Ford, Jeremy R. Mould, John A. Graham, John Huchra, Jr., Kim Sebo & N.A. Silbermann, Laura Ferrarese, Lucas Macri, Peter B. Stetson, Robert C. Kennicutt, Shaun M. Hughes, Shoko Sakai, Wendy L. Freedman

arxiv:astro-ph/9908192 v2 · 1999-08-17 · 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{6F7L6UF47HBATXJQJELIFN5OLO}

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	2026-05-18T03:47:42.380823Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f17ebf50bcf9c209dd30491682b7ae5bb77acf6d7ee12b441b17e0f356307421

Aliases

arxiv: astro-ph/9908192 · arxiv_version: astro-ph/9908192v2 · doi: 10.48550/arxiv.astro-ph/9908192 · pith_short_12: 6F7L6UF47HBA · pith_short_16: 6F7L6UF47HBATXJQ · pith_short_8: 6F7L6UF4

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/6F7L6UF47HBATXJQJELIFN5OLO \
  | 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: f17ebf50bcf9c209dd30491682b7ae5bb77acf6d7ee12b441b17e0f356307421

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "529ca48dd4ed2af4cf68d7f3ef4fb52b0af5c2947ad99c3321f5d2dd8434317b",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-08-17T23:33:57Z",
    "title_canon_sha256": "5fa819ff050b9f1de0dfb8df500f52b2324aa4c7a95d75b5a78270553ad057dc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9908192",
    "kind": "arxiv",
    "version": 2
  }
}