Pith Number

pith:W7YMUBZU

pith:2006:W7YMUBZUCW3WIH4IPDX7Z7WLGY

not attested not anchored not stored refs pending

Comparing Dynamical and Stellar Population Mass-to-Light Ratio Estimates

Eric Bell (MPIA), Roelof S. de Jong (STScI)

arxiv:astro-ph/0604391 v1 · 2006-04-19 · 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{W7YMUBZUCW3WIH4IPDX7Z7WLGY}

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	2026-05-18T01:40:32.039461Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b7f0ca073415b7641f8878effcfecb361d5b21b484bf931ac3f8004afc227398

Aliases

arxiv: astro-ph/0604391 · arxiv_version: astro-ph/0604391v1 · doi: 10.48550/arxiv.astro-ph/0604391 · pith_short_12: W7YMUBZUCW3W · pith_short_16: W7YMUBZUCW3WIH4I · pith_short_8: W7YMUBZU

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/W7YMUBZUCW3WIH4IPDX7Z7WLGY \
  | 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: b7f0ca073415b7641f8878effcfecb361d5b21b484bf931ac3f8004afc227398

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4e31ec142a6d48d7a0ab0a576e996bd944f6dc17090d5158e47921328252b863",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2006-04-19T13:08:48Z",
    "title_canon_sha256": "a472117ed37bb715283b6344129c8989bac2b6bbf497f00f7c9ebddea33996e4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0604391",
    "kind": "arxiv",
    "version": 1
  }
}