Pith Number

pith:VH5X7HCJ

pith:2018:VH5X7HCJ3ENYN5KWTQ4UBLHLD7

not attested not anchored not stored refs pending

Cluster formation in the W40 and Serpens South complex triggered by the expanding HII region

Fumitaka Nakamura, Kazuhito Dobashi, Koji Sugitani, Tomomi Shimoikura, Yoshito Shimajiri

arxiv:1809.09855 v1 · 2018-09-26 · 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{VH5X7HCJ3ENYN5KWTQ4UBLHLD7}

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	2026-05-17T23:59:49.574568Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a9fb7f9c49d91b86f5569c3940aceb1ff47291e3a580792c13adb3661326df25

Aliases

arxiv: 1809.09855 · arxiv_version: 1809.09855v1 · doi: 10.48550/arxiv.1809.09855 · pith_short_12: VH5X7HCJ3ENY · pith_short_16: VH5X7HCJ3ENYN5KW · pith_short_8: VH5X7HCJ

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/VH5X7HCJ3ENYN5KWTQ4UBLHLD7 \
  | 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: a9fb7f9c49d91b86f5569c3940aceb1ff47291e3a580792c13adb3661326df25

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6cb94672428e85568313f28e8092b9e99f51b88211cd9a448047452c4eb47efe",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-09-26T09:00:52Z",
    "title_canon_sha256": "043e62ccb4358542e3fcd10fdaedaea73ad7cd56e132102877d63c381054c20a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.09855",
    "kind": "arxiv",
    "version": 1
  }
}