Pith Number

pith:WR4227EK

pith:2010:WR4227EKB2L7SLLVKMHNKRUOQV

not attested not anchored not stored refs pending

The Ap 2-1 nebula and the surrounding molecular cloud G35.2-0.74: an active star forming region

Sergio Paron, Walter Weidmann

arxiv:1007.0724 v1 · 2010-07-05 · 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{WR4227EKB2L7SLLVKMHNKRUOQV}

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	2026-05-18T02:06:32.321758Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b479ad7c8a0e97f92d75530ed5468e85534af99478d665409e7c5f7f656c2fe9

Aliases

arxiv: 1007.0724 · arxiv_version: 1007.0724v1 · doi: 10.48550/arxiv.1007.0724 · pith_short_12: WR4227EKB2L7 · pith_short_16: WR4227EKB2L7SLLV · pith_short_8: WR4227EK

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/WR4227EKB2L7SLLVKMHNKRUOQV \
  | 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: b479ad7c8a0e97f92d75530ed5468e85534af99478d665409e7c5f7f656c2fe9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "09fb8d3682f0e172e012345ea146a38936f59d0085c389fec16909428aa33204",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2010-07-05T16:46:46Z",
    "title_canon_sha256": "64daaf1a78fe6a41968b4f8c23994515284fb96be6a98d85fd277da505247d21"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1007.0724",
    "kind": "arxiv",
    "version": 1
  }
}