Pith Number

pith:37L33HEG

pith:2018:37L33HEGSZ4ZMHHPCABI3VY64F

not attested not anchored not stored refs pending

Software tool for automatic detection of solar plages in the Coimbra Observatory spectroheliograms

A. Garcia, A.M. Lourenco, F. Pinheiro, I. Dorotovic, J. Fernandes, S. Carvalho, T. Barata

arxiv:1811.08389 v1 · 2018-11-20 · 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{37L33HEGSZ4ZMHHPCABI3VY64F}

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	2026-05-18T00:00:14.208067Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dfd7bd9c869679961cef10028dd71ee1620f0e4972fe8f49163e6640c2c7306f

Aliases

arxiv: 1811.08389 · arxiv_version: 1811.08389v1 · doi: 10.48550/arxiv.1811.08389 · pith_short_12: 37L33HEGSZ4Z · pith_short_16: 37L33HEGSZ4ZMHHP · pith_short_8: 37L33HEG

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/37L33HEGSZ4ZMHHPCABI3VY64F \
  | 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: dfd7bd9c869679961cef10028dd71ee1620f0e4972fe8f49163e6640c2c7306f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0a89ccd603473eb4ebef5013fe03523f2df1354e79553a1b3cba13aeb35da795",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-11-20T17:51:37Z",
    "title_canon_sha256": "863184dff8cce29ee1af491fcfb783b0f92e0f22345d5cc5527fdd6abcfb29b0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.08389",
    "kind": "arxiv",
    "version": 1
  }
}