Pith Number

pith:4JOJDTFF

pith:2013:4JOJDTFFO52JNBOD4LAIKGYCJH

not attested not anchored not stored refs pending

Physical Properties of a Sunspot Chromosphere with Umbral Flashes

H. Socas-Navarro, J. de la Cruz Rodr\'iguez, L. Rouppe van der Voort, M. van Noort

arxiv:1304.0752 v1 · 2013-04-02 · astro-ph.SR · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4JOJDTFFO52JNBOD4LAIKGYCJH}

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	2026-05-18T01:50:49.885456Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e25c91cca577749685c3e2c0851b0249ef6898c352b1b75aa04695ccbb7c3305

Aliases

arxiv: 1304.0752 · arxiv_version: 1304.0752v1 · doi: 10.48550/arxiv.1304.0752 · pith_short_12: 4JOJDTFFO52J · pith_short_16: 4JOJDTFFO52JNBOD · pith_short_8: 4JOJDTFF

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/4JOJDTFFO52JNBOD4LAIKGYCJH \
  | 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: e25c91cca577749685c3e2c0851b0249ef6898c352b1b75aa04695ccbb7c3305

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7ad4b1f1023a31d9c97a2adf655ca76983d1d4472910ff0adc996f3088668114",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2013-04-02T19:43:01Z",
    "title_canon_sha256": "c4c500b121a7ff3b3dd3925347cea036046c65f0101744d1f8df6195e274c298"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.0752",
    "kind": "arxiv",
    "version": 1
  }
}