Pith Number

pith:UKV4SPZ5

pith:2009:UKV4SPZ552Y75ADDKQOJ4MIEX5

not attested not anchored not stored refs pending

Detection of Structure in Infrared-Dark Clouds with Spitzer: Characterizing Star Formation in the Molecular Ring

Edwin A. Bergin, Robert A. Gutermuth, Sarah E. Ragan

arxiv:0903.2771 v1 · 2009-03-16 · astro-ph.SR · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UKV4SPZ552Y75ADDKQOJ4MIEX5}

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	2026-05-18T02:35:00.383530Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a2abc93f3deeb1fe8063541c9e3104bf6e4576912f21a1988b18a48baefeb831

Aliases

arxiv: 0903.2771 · arxiv_version: 0903.2771v1 · doi: 10.48550/arxiv.0903.2771 · pith_short_12: UKV4SPZ552Y7 · pith_short_16: UKV4SPZ552Y75ADD · pith_short_8: UKV4SPZ5

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/UKV4SPZ552Y75ADDKQOJ4MIEX5 \
  | 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: a2abc93f3deeb1fe8063541c9e3104bf6e4576912f21a1988b18a48baefeb831

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "936f96ab9619512c85934b0f859d19ae88d911601ed7d0d221f29402ff9af055",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-03-16T19:31:24Z",
    "title_canon_sha256": "8adec4d5831624b6acda879efd2f67f960ec32be4433e59c2205539476c2ea49"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.2771",
    "kind": "arxiv",
    "version": 1
  }
}