Pith Number

pith:UKWQVGH4

pith:2026:UKWQVGH4CFDHLTXWT235QDJFDR

not attested not anchored not stored refs pending

Datacubes of H$\alpha$, CaII K, CaII H and H$\epsilon$ line profiles of the full solar disk recorded daily at Meudon observatory since 2017 and some typical profiles of solar features

Jean-Marie Malherbe (LIRA, PSL)

arxiv:2605.18499 v1 · 2026-05-18 · astro-ph.IM · 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{UKWQVGH4CFDHLTXWT235QDJFDR}

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	2026-05-20T00:06:04.365883Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a2ad0a98fc114675cef69eb7d80d251c41eb8151e4db065275a0a477a904ce0f

Aliases

arxiv: 2605.18499 · arxiv_version: 2605.18499v1 · doi: 10.48550/arxiv.2605.18499 · pith_short_12: UKWQVGH4CFDH · pith_short_16: UKWQVGH4CFDHLTXW · pith_short_8: UKWQVGH4

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/UKWQVGH4CFDHLTXWT235QDJFDR \
  | 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: a2ad0a98fc114675cef69eb7d80d251c41eb8151e4db065275a0a477a904ce0f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d4b29c3d23b5a41112c56d23b19c0a80ea01aec594038cde4b48043902091254",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2026-05-18T14:51:58Z",
    "title_canon_sha256": "9660c08e61b7c935f4888d4a7983f185880ed438f1ba6eab8faa16aa2f02dad9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.18499",
    "kind": "arxiv",
    "version": 1
  }
}