Pith Number

pith:4OIN6WFZ

pith:2001:4OIN6WFZIVYGHL5LTZPPRDVWJ6

not attested not anchored not stored refs pending

High Mass, OB Star Formation in M51 : HST Halpha and Palpha Imaging

M. Polletta (California Institute of Technology, M. Rieke (Steward Observatory, N. Z. Scoville (California Institute of Technology), Observatory of Geneva), R. Thompson, S. Ewald, S. R. Stolovy (California Institute of Technology), University of Arizona)

arxiv:astro-ph/0108248 v1 · 2001-08-14 · 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{4OIN6WFZIVYGHL5LTZPPRDVWJ6}

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	2026-05-18T01:07:45.592081Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e390df58b9457063afab9e5ef88eb64f87671def0173b44f24321c9397f549f6

Aliases

arxiv: astro-ph/0108248 · arxiv_version: astro-ph/0108248v1 · doi: 10.48550/arxiv.astro-ph/0108248 · pith_short_12: 4OIN6WFZIVYG · pith_short_16: 4OIN6WFZIVYGHL5L · pith_short_8: 4OIN6WFZ

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/4OIN6WFZIVYGHL5LTZPPRDVWJ6 \
  | 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: e390df58b9457063afab9e5ef88eb64f87671def0173b44f24321c9397f549f6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ee893590c6615922a4a2e61099ef1deb75491d9f1de0548cd097774958e08b8b",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-08-14T22:31:03Z",
    "title_canon_sha256": "73ee1842fea7a68f6961e0ea9b7c85713a9caad4277ad5126a46a452337c9450"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0108248",
    "kind": "arxiv",
    "version": 1
  }
}