Pith Number

pith:SKRUPT6U

pith:2012:SKRUPT6UENHZKHTHVKFLWKDKDJ

not attested not anchored not stored refs pending

IC 4663: The first unambiguous [WN] Wolf-Rayet central star of a planetary nebula

A. Acker (Strasbourg), A. F. J. Moffat (Montr\'eal/CRAQ), B. Miszalski (SAAO/SALT), J. K\"oppen (Strasbourg/ISU/Kiel), O. De Marco (Macquarie), P. A. Crowther (Sheffield), T. C. Hillwig (Valparaiso)

arxiv:1203.3303 v1 · 2012-03-15 · 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{SKRUPT6UENHZKHTHVKFLWKDKDJ}

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	2026-05-18T01:58:08.525701Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

92a347cfd4234f951e67aa8abb286a1a47a20f2358484442d34fcd4d7dddf236

Aliases

arxiv: 1203.3303 · arxiv_version: 1203.3303v1 · doi: 10.48550/arxiv.1203.3303 · pith_short_12: SKRUPT6UENHZ · pith_short_16: SKRUPT6UENHZKHTH · pith_short_8: SKRUPT6U

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/SKRUPT6UENHZKHTHVKFLWKDKDJ \
  | 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: 92a347cfd4234f951e67aa8abb286a1a47a20f2358484442d34fcd4d7dddf236

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fe4f8032c96aa9deeafc506a97fb462e571a10e4fd8fcadbf585c93d8c0015a9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2012-03-15T10:10:55Z",
    "title_canon_sha256": "03650cf966540bf50d0d582e30d3de3ad319ce876770acd812f80f3026efe7aa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.3303",
    "kind": "arxiv",
    "version": 1
  }
}