Pith Number

pith:GY2S4UID

pith:2008:GY2S4UIDECWV2HICDD5ZIA4FMP

not attested not anchored not stored refs pending

The dense ring in the Coalsack: the merging of two subsonic flows

C. J. Lada, H. M. Butner, J. M. Rathborne, M. Saul, W. Walsh

arxiv:0809.2038 v1 · 2008-09-11 · 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{GY2S4UIDECWV2HICDD5ZIA4FMP}

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	2026-05-18T04:29:32.767942Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

36352e510320ad5d1d0218fb94038563eb834fbb17bc84e45a0c16d7157d90af

Aliases

arxiv: 0809.2038 · arxiv_version: 0809.2038v1 · doi: 10.48550/arxiv.0809.2038 · pith_short_12: GY2S4UIDECWV · pith_short_16: GY2S4UIDECWV2HIC · pith_short_8: GY2S4UID

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/GY2S4UIDECWV2HICDD5ZIA4FMP \
  | 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: 36352e510320ad5d1d0218fb94038563eb834fbb17bc84e45a0c16d7157d90af

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "40e4cf7c249f03ecece33610e5cf77ad530758df328a9a900533e61b7ef8c2ee",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-09-11T15:58:38Z",
    "title_canon_sha256": "8164518800a79e2ad4848a7e89f6828dc0dfd8df5734c386e3919e00001269b9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.2038",
    "kind": "arxiv",
    "version": 1
  }
}