Pith Number

pith:GQNKQOQR

pith:2019:GQNKQOQRDA5WXPKPPRSXKDJX44

not attested not anchored not stored refs pending

Determination of the primordial helium abundance based on NGC 346 an HII region of the Small Magellanic Cloud

Andr\'es Sixtos, Antonio Peimbert, Mabel Valerdi, Manuel Peimbert

arxiv:1904.01594 v1 · 2019-04-02 · astro-ph.GA · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GQNKQOQRDA5WXPKPPRSXKDJX44}

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.

Cited by

1 paper in Pith

Nucleosynthesis and CMB bounds on photophilic ALPs: a fresh look

Receipt and verification

First computed	2026-05-17T23:46:17.939401Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

341aa83a11183b6bbd4f7c65750d37e725e36ac0d43d4423a7e5444c188ce583

Aliases

arxiv: 1904.01594 · arxiv_version: 1904.01594v1 · doi: 10.48550/arxiv.1904.01594 · pith_short_12: GQNKQOQRDA5W · pith_short_16: GQNKQOQRDA5WXPKP · pith_short_8: GQNKQOQR

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/GQNKQOQRDA5WXPKPPRSXKDJX44 \
  | 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: 341aa83a11183b6bbd4f7c65750d37e725e36ac0d43d4423a7e5444c188ce583

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2f95655a22eebd52c9c646be23d06595eadffd8781ab9031b2cefd65fa6b22b5",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-04-02T18:00:05Z",
    "title_canon_sha256": "e9d4961e9a7191897cd9219bd0d82d7c27aef56bb292f1b2b7337e604ead708f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.01594",
    "kind": "arxiv",
    "version": 1
  }
}