Pith Number

pith:ECH4OUKI

pith:2011:ECH4OUKIVWADCTRHIEUFDJRODB

not attested not anchored not stored refs pending

UV Spectroscopy of the Central Star of the Planetary Nebula A43

Ellen Ringat, Felix Friederich, Jeffrey W. Kruk, Klaus Werner, Thomas Rauch

arxiv:1102.3090 v1 · 2011-02-15 · 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{ECH4OUKIVWADCTRHIEUFDJRODB}

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	2026-05-18T04:28:38.430365Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

208fc75148ad80314e27412851a62e1870a6c78465bd9b809adcca84138b3345

Aliases

arxiv: 1102.3090 · arxiv_version: 1102.3090v1 · doi: 10.48550/arxiv.1102.3090 · pith_short_12: ECH4OUKIVWAD · pith_short_16: ECH4OUKIVWADCTRH · pith_short_8: ECH4OUKI

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/ECH4OUKIVWADCTRHIEUFDJRODB \
  | 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: 208fc75148ad80314e27412851a62e1870a6c78465bd9b809adcca84138b3345

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "358e984721bf589a717863692b0289fa14e59ae0507d8e2b9586827f0b509a56",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2011-02-15T14:53:30Z",
    "title_canon_sha256": "8dbdd4b9e37f9ac18b768b35275c50c2a36e8c75461a6d948c5372d727f4c7a8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.3090",
    "kind": "arxiv",
    "version": 1
  }
}