Pith Number

pith:VAAU5YBZ

pith:2010:VAAU5YBZVGLSM7A36MAC6MS4IE

not attested not anchored not stored refs pending

Planetary Nebulae: Observational Properties, Mimics, and Diagnostics

David J. Frew, Quentin A. Parker

arxiv:1002.1525 v1 · 2010-02-08 · 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{VAAU5YBZVGLSM7A36MAC6MS4IE}

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	2026-05-18T02:09:11.427670Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a8014ee039a997267c1bf3002f325c412000d747d732a35450e5cd244c2b4335

Aliases

arxiv: 1002.1525 · arxiv_version: 1002.1525v1 · doi: 10.48550/arxiv.1002.1525 · pith_short_12: VAAU5YBZVGLS · pith_short_16: VAAU5YBZVGLSM7A3 · pith_short_8: VAAU5YBZ

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/VAAU5YBZVGLSM7A36MAC6MS4IE \
  | 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: a8014ee039a997267c1bf3002f325c412000d747d732a35450e5cd244c2b4335

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "294cd2ca14efd252c6497f51fc2dba23218c96b1d092c5deee6be1f736e98e62",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2010-02-08T05:28:46Z",
    "title_canon_sha256": "a7af7fcaf754a72888a106e8c51ccee4f463f455d36d1c764c7a911c2aed8c7c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1002.1525",
    "kind": "arxiv",
    "version": 1
  }
}