Pith Number

pith:4OGHWRNJ

pith:2026:4OGHWRNJ5WFIVTMKRLD6QQP2HB

not attested not anchored not stored refs pending

Polarized lines of the second solar spectrum (SrI, SrII, CaI, BaII) observed at the Pic du Midi Turret Dome spectropolarimeter with the slit orthogonal to the limb

Jean-Marie Malherbe (LIRA, PSL)

arxiv:2606.01989 v1 · 2026-06-01 · 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{4OGHWRNJ5WFIVTMKRLD6QQP2HB}

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	2026-06-02T02:05:02.894666Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e38c7b45a9ed8a8acd8a8ac7e841fa3847f51a8894540481d2565d9359832b6b

Aliases

arxiv: 2606.01989 · arxiv_version: 2606.01989v1 · doi: 10.48550/arxiv.2606.01989 · pith_short_12: 4OGHWRNJ5WFI · pith_short_16: 4OGHWRNJ5WFIVTMK · pith_short_8: 4OGHWRNJ

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/4OGHWRNJ5WFIVTMKRLD6QQP2HB \
  | 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: e38c7b45a9ed8a8acd8a8ac7e841fa3847f51a8894540481d2565d9359832b6b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "af975516ec651cdd3867dc7798bf800f9d8403fafe8f20aee63c563ed9c8ed0d",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2026-06-01T09:47:48Z",
    "title_canon_sha256": "5a784c5389d8af42e7b9e69d6fc25f6a3806d163676d36bfd80e4391eccd8b52"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.01989",
    "kind": "arxiv",
    "version": 1
  }
}