Pith Number

pith:ERMII42E

pith:2025:ERMII42E453D7HFQKQ3CD43ARZ

not attested not anchored not stored refs pending

Recalibration of the H$\alpha$ surface brightness-radius relation for planetary nebulae using Gaia DR3: new distances and the Milky Way oxygen radial gradient

Adalberto R. da Cunha-Silva, Andr\'e F. S. Cardoso, Hektor Monteiro, Miguel Cervi\~no, Oscar Cavichia, Walter J. Maciel

arxiv:2509.19239 v2 · 2025-09-23 · 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{ERMII42E453D7HFQKQ3CD43ARZ}

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	2026-05-21T01:05:09.385051Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2458847344e7763f9cb0543621f3608e65f4e2dced8a25f7c3a2358a9ad9467f

Aliases

arxiv: 2509.19239 · arxiv_version: 2509.19239v2 · doi: 10.48550/arxiv.2509.19239 · pith_short_12: ERMII42E453D · pith_short_16: ERMII42E453D7HFQ · pith_short_8: ERMII42E

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/ERMII42E453D7HFQKQ3CD43ARZ \
  | 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: 2458847344e7763f9cb0543621f3608e65f4e2dced8a25f7c3a2358a9ad9467f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "abfa739c4a9ad1113377a9e90dd82eb121f0588836438fb2d0328aae357f9cfa",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2025-09-23T17:00:39Z",
    "title_canon_sha256": "c3139b88db0e29d3890411ea26c2282c54da15c95306560df70f6a140cfe6bcc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2509.19239",
    "kind": "arxiv",
    "version": 2
  }
}