Pith Number

pith:MNPUZICP

pith:1999:MNPUZICPGJ4NZ5QWOV2XS7P4EE

not attested not anchored not stored refs pending

Pinwheel nebula around WR 98a

2), (2) Smithsonian Astrophysical Observatory, 3), (3) University of Sydney), J. D. Monnier (1, P. G. Tuthill (1, W. C. Danchi (1) ((1) UC Berkeley

arxiv:astro-ph/9909282 v1 · 1999-09-16 · 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{MNPUZICPGJ4NZ5QWOV2XS7P4EE}

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	2026-07-04T16:11:37.061001Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

635f4ca04f3278dcf6167575797dfc2106dd4b8c6856e5a6d9c1f48d281c8a16

Aliases

arxiv: astro-ph/9909282 · arxiv_version: astro-ph/9909282v1 · doi: 10.48550/arxiv.astro-ph/9909282 · pith_short_12: MNPUZICPGJ4N · pith_short_16: MNPUZICPGJ4NZ5QW · pith_short_8: MNPUZICP

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/MNPUZICPGJ4NZ5QWOV2XS7P4EE \
  | 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: 635f4ca04f3278dcf6167575797dfc2106dd4b8c6856e5a6d9c1f48d281c8a16

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "27f9098a4074c06f7cc53bbaf2e9d9179d02621779c18fda782e5f2a6c931209",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-09-16T00:21:00Z",
    "title_canon_sha256": "22fca98fed759fe11a7bed1553f9a0947ec7b9ea859af588b2e0c90b83052f00"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9909282",
    "kind": "arxiv",
    "version": 1
  }
}