Pith Number

pith:B5WCTSNL

pith:2016:B5WCTSNLD35HFOKHPMN2VOQPG4

not attested not anchored not stored refs pending

A study on Ca II 854.2 nm emission in a sunspot umbra using a thin cloud model

H. Hamedivafa, L. Bellot Rubio, M. Sobotka, S. Esteban Pozuelo

arxiv:1612.06636 v1 · 2016-12-20 · 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{B5WCTSNLD35HFOKHPMN2VOQPG4}

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	2026-05-18T00:54:25.180227Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0f6c29c9ab1efa72b9477b1baaba0f3730b025855d5e77d640a7bae8fe8203f9

Aliases

arxiv: 1612.06636 · arxiv_version: 1612.06636v1 · doi: 10.48550/arxiv.1612.06636 · pith_short_12: B5WCTSNLD35H · pith_short_16: B5WCTSNLD35HFOKH · pith_short_8: B5WCTSNL

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/B5WCTSNLD35HFOKHPMN2VOQPG4 \
  | 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: 0f6c29c9ab1efa72b9477b1baaba0f3730b025855d5e77d640a7bae8fe8203f9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8de2b25f0eddb974ac8be63c1351ebe8b36e1f79754f0e6601f70ccf1978e8db",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2016-12-20T12:43:59Z",
    "title_canon_sha256": "fab5e66db3462b738ec68c5bebe1f3f19272f664923ba853d028141d388b9aeb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1612.06636",
    "kind": "arxiv",
    "version": 1
  }
}