Pith Number

pith:QDEWTC4W

pith:1999:QDEWTC4WFG7UEGB6R3LHHBZTO2

not attested not anchored not stored refs pending

The HST Key Project on the Extragalactic Distance Scale. XXVIII. Combining the Constraints on 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 P Huchra, Kim Sebo, Laura Ferrarese, Lucas M Macri, Nancy A Silbermann, Peter B Stetson, Robert C Kennicutt Jr, Shaun Hughes, Shoko Sakai, Wendy L Freedman

arxiv:astro-ph/9909260 v1 · 1999-09-15 · 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{QDEWTC4WFG7UEGB6R3LHHBZTO2}

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

2 papers in Pith

Resolved HI and Environmental Dynamics

Caught in the act: interaction-driven evolution in the nearby compact galaxy group Roberts Quartet (SCG0018-4854)

Receipt and verification

First computed	2026-07-04T16:11:36.732615Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

80c9698b9629bf42183e8ed6738733769b4acac279f1fc52653761d7da4ebb8b

Aliases

arxiv: astro-ph/9909260 · arxiv_version: astro-ph/9909260v1 · doi: 10.48550/arxiv.astro-ph/9909260 · pith_short_12: QDEWTC4WFG7U · pith_short_16: QDEWTC4WFG7UEGB6 · pith_short_8: QDEWTC4W

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/QDEWTC4WFG7UEGB6R3LHHBZTO2 \
  | 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: 80c9698b9629bf42183e8ed6738733769b4acac279f1fc52653761d7da4ebb8b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9f8f968dca6b578f751a2722ab8d4fb45198532a439dcdb8537556ed777e00ec",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-09-15T13:44:41Z",
    "title_canon_sha256": "6e54df3637130c1f95bb714ddd8301c1dc252d81f85a96311730940e4340de0e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9909260",
    "kind": "arxiv",
    "version": 1
  }
}