Pith Number

pith:4YQKP6AA

pith:2003:4YQKP6AAP5BJFULV3NQ675ALLZ

not attested not anchored not stored refs pending

The Cepheid Distance to NGC 1637: A Direct Test of the EPM Distance to SN 1999em

Choong C. Ngeow, Douglas C. Leonard, Nial R. Tanvir, Shashi M. Kanbur

arxiv:astro-ph/0305259 v1 · 2003-05-15 · 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{4YQKP6AAP5BJFULV3NQ675ALLZ}

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	2026-07-04T16:37:08.549567Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e620a7f8007f4292d175db61eff40b5e7313d8711f0f6636feb722116900847d

Aliases

arxiv: astro-ph/0305259 · arxiv_version: astro-ph/0305259v1 · doi: 10.48550/arxiv.astro-ph/0305259 · pith_short_12: 4YQKP6AAP5BJ · pith_short_16: 4YQKP6AAP5BJFULV · pith_short_8: 4YQKP6AA

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/4YQKP6AAP5BJFULV3NQ675ALLZ \
  | 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: e620a7f8007f4292d175db61eff40b5e7313d8711f0f6636feb722116900847d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "421ee0d96fdf8aa2db9f66912634ea64426c6af45bf5743a944ed3e2eff9d19d",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-05-15T08:23:15Z",
    "title_canon_sha256": "95bc2090fefcd63115d755924c091da274114223164c114954bef4523203774a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0305259",
    "kind": "arxiv",
    "version": 1
  }
}