Pith Number

pith:5LQOQRUP

pith:2001:5LQOQRUP6JKFCTAHYGYBXJUK4C

not attested not anchored not stored refs pending

The Discovery of Cepheids and a New Distance to NGC 2841 Using the Hubble Space Telescope

B.F. Madore (OCIW & IPAC), G.D. Bothun (U. of Oregon), L.M. Macri (CfA), M.W. Richmond (RIT), P.B. Stetson (DAO), P.M. Garnavich (Notre Dame), S. Jha (CfA), W.L. Freedman (OCIW)

arxiv:astro-ph/0105491 v1 · 2001-05-28 · 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{5LQOQRUP6JKFCTAHYGYBXJUK4C}

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	2026-05-18T01:40:44.502210Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

eae0e8468ff254514c07c1b01ba68ae0ad095fc6f83f3a428a5ac60a8ee43919

Aliases

arxiv: astro-ph/0105491 · arxiv_version: astro-ph/0105491v1 · doi: 10.48550/arxiv.astro-ph/0105491 · pith_short_12: 5LQOQRUP6JKF · pith_short_16: 5LQOQRUP6JKFCTAH · pith_short_8: 5LQOQRUP

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/5LQOQRUP6JKFCTAHYGYBXJUK4C \
  | 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: eae0e8468ff254514c07c1b01ba68ae0ad095fc6f83f3a428a5ac60a8ee43919

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6a475bf09b38a387aeb37c63d5b02fba441d7e3ea149aeee6f7f93922812177a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-05-28T23:20:43Z",
    "title_canon_sha256": "0789836aa6397580f428154c1c80f3adf3c3dbd4e01f8b8ee508c3cf7b998cde"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0105491",
    "kind": "arxiv",
    "version": 1
  }
}