Pith Number

pith:MP4HP42T

pith:1999:MP4HP42TRJFLCX5XQQ25Q64WOV

not attested not anchored not stored refs pending

Circumstellar disc of beta Pictoris: constraints on grain properties from polarization

Bonn, E. Kruegel (2) ((1) Sobolev Astronomical Institute, Germany), N.V. Voshchinnikov (1), Russia (2) Max-Planck-Institut fuer Radioastronomie, St. Petersburg, St. Petersburg University

arxiv:astro-ph/9909292 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{MP4HP42TRJFLCX5XQQ25Q64WOV}

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.

Cited by

1 paper in Pith

Pollux UV & FUV polarimeters: first lab results

Receipt and verification

First computed	2026-07-04T14:17:07.600745Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

63f877f3538a4ab15fb78435d87b96756abf0d8f3a6b0e3b7ad9aae97f289e85

Aliases

arxiv: astro-ph/9909292 · arxiv_version: astro-ph/9909292v1 · doi: 10.48550/arxiv.astro-ph/9909292 · pith_short_12: MP4HP42TRJFL · pith_short_16: MP4HP42TRJFLCX5X · pith_short_8: MP4HP42T

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/MP4HP42TRJFLCX5XQQ25Q64WOV \
  | 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: 63f877f3538a4ab15fb78435d87b96756abf0d8f3a6b0e3b7ad9aae97f289e85

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ab4d0df83dbefd1f86f8462ab02fae7d171f16f0bf0d4ce6ddb4464e368f7bc9",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-09-16T14:14:25Z",
    "title_canon_sha256": "401597cdfc36eccb4dbdd1a09b39eefdf5d8ec20550f455a2684871a60036d8d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9909292",
    "kind": "arxiv",
    "version": 1
  }
}