Pith Number

pith:Y3BLZACL

pith:2019:Y3BLZACLBIAMP3TABIBSR5AF7J

not attested not anchored not stored refs pending

Ultracompact H II Regions with Extended Emission: The Complete View

Alicia Porras, Carlos Rodr\'iguez-Rico, Daniel Tafoya, Eduardo de la Fuente, Jos\'e Franco, Miguel A. Trinidad, Simon N. Kemp, Stanley E. Kurtz

arxiv:1912.08958 v1 · 2019-12-19 · astro-ph.GA · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Y3BLZACLBIAMP3TABIBSR5AF7J}

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	2026-07-05T00:27:22.061600Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c6c2bc804b0a00c7ee600a0328f405fa4ad84fcd3adad6c2df223442ad1536a9

Aliases

arxiv: 1912.08958 · arxiv_version: 1912.08958v1 · doi: 10.48550/arxiv.1912.08958 · pith_short_12: Y3BLZACLBIAM · pith_short_16: Y3BLZACLBIAMP3TA · pith_short_8: Y3BLZACL

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/Y3BLZACLBIAMP3TABIBSR5AF7J \
  | 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: c6c2bc804b0a00c7ee600a0328f405fa4ad84fcd3adad6c2df223442ad1536a9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ed269c9997be13ce8c41bf76e36a3e98f8818585445ae118aa500b721eec0655",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-12-19T00:25:46Z",
    "title_canon_sha256": "1f6298bd65d6a86c04dc8da37cdee467a59bd037fdc828a1afb1667187191dc5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1912.08958",
    "kind": "arxiv",
    "version": 1
  }
}