Pith Number

pith:O2USVHKT

pith:2009:O2USVHKTPZ2I3EZ36HEUS6G5OF

not attested not anchored not stored refs pending

A new raytracer for modeling AU-scale imaging of lines from protoplanetary disks

Cornelis P. Dullemond, Geoffrey A. Blake, Klaus M. Pontoppidan, Rowin Meijerink

arxiv:0908.2997 v1 · 2009-08-20 · astro-ph.EP · astro-ph.IM

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{O2USVHKTPZ2I3EZ36HEUS6G5OF}

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	2026-05-18T02:12:24.604469Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

76a92a9d537e748d933bf1c94978dd71789efb23ce374230918f121bcb15252d

Aliases

arxiv: 0908.2997 · arxiv_version: 0908.2997v1 · doi: 10.48550/arxiv.0908.2997 · pith_short_12: O2USVHKTPZ2I · pith_short_16: O2USVHKTPZ2I3EZ3 · pith_short_8: O2USVHKT

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/O2USVHKTPZ2I3EZ36HEUS6G5OF \
  | 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: 76a92a9d537e748d933bf1c94978dd71789efb23ce374230918f121bcb15252d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b24652dfdda54fdebe2b8be41aa0a97642b2a83c58f03c70e659b7b432343ed7",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2009-08-20T20:02:40Z",
    "title_canon_sha256": "98fead961f93f96ae86ddea6f26605648ba87af5b285d8d7a2eff83ffc9f6967"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.2997",
    "kind": "arxiv",
    "version": 1
  }
}