Pith Number

pith:7QAIKQH7

pith:2025:7QAIKQH7T2RQQ5RR3GQNIMTF5S

not attested not anchored not stored refs pending

New clues on the extended HeII ionization in IZw18 from GTC/MEGARA and JWST/MIRI

A. Arroyo-Polonio, C. Kehrig, D. Reverte, E. Perez-Montero, J. Gallego, J. Iglesias-P\'aramo, J.M. V\'ilchez, S. Duarte Puertas

arxiv:2507.01742 v1 · 2025-07-02 · 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{7QAIKQH7T2RQQ5RR3GQNIMTF5S}

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	2026-07-05T11:31:47.338285Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc008540ff9ea3087631d9a0d43265eca3f38be9c6f70a11fcef937ed4a50d37

Aliases

arxiv: 2507.01742 · arxiv_version: 2507.01742v1 · doi: 10.48550/arxiv.2507.01742 · pith_short_12: 7QAIKQH7T2RQ · pith_short_16: 7QAIKQH7T2RQQ5RR · pith_short_8: 7QAIKQH7

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/7QAIKQH7T2RQQ5RR3GQNIMTF5S \
  | 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: fc008540ff9ea3087631d9a0d43265eca3f38be9c6f70a11fcef937ed4a50d37

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dcabafb8ac3b272c5bcd2a54a1a788eed47e59ce83e1cde08d495cb2686bb827",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2025-07-02T14:22:17Z",
    "title_canon_sha256": "b7cadf0cc57117b8a3b6dc592c525f19bc387108630e1be3556802307895d271"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2507.01742",
    "kind": "arxiv",
    "version": 1
  }
}