Pith Number

pith:CQPYBWQZ

pith:2009:CQPYBWQZ2LU5ABLNW63BHTIRRH

not attested not anchored not stored refs pending

Electron Temperatures of Planetary Nebulae Determined from the He I Discontinuities

C.-T. Hua, H.-B. Yuan, J. Nakashima, S. Kwok, X.-W. Liu, Y. Zhang

arxiv:0901.1411 v1 · 2009-01-11 · 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{CQPYBWQZ2LU5ABLNW63BHTIRRH}

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	2026-05-18T04:29:23.975188Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

141f80da19d2e9d0056db7b613cd1189cd20155724ef5ad7d9749f4bf2d11df7

Aliases

arxiv: 0901.1411 · arxiv_version: 0901.1411v1 · doi: 10.48550/arxiv.0901.1411 · pith_short_12: CQPYBWQZ2LU5 · pith_short_16: CQPYBWQZ2LU5ABLN · pith_short_8: CQPYBWQZ

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/CQPYBWQZ2LU5ABLNW63BHTIRRH \
  | 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: 141f80da19d2e9d0056db7b613cd1189cd20155724ef5ad7d9749f4bf2d11df7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b9d5b34de90258ed23448b714181a5b78e8abe0537fa17f9451d0c4340d5b8af",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-01-11T04:09:45Z",
    "title_canon_sha256": "ebed8634ecd7ef914c32d455aa82a966a3f7f26dff01e3899372a7ae62d29bb5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.1411",
    "kind": "arxiv",
    "version": 1
  }
}