Pith Number

pith:M4SSDED6

pith:2008:M4SSDED6QZ5VKJ4FCTCULSJV4P

not attested not anchored not stored refs pending

Discovery of a [WO] central star in the planetary nebula Th 2-A

R. Gamen, R. J. Diaz, V. S. Niemela, W. A. Weidmann

arxiv:0806.4968 v1 · 2008-06-30 · astro-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{M4SSDED6QZ5VKJ4FCTCULSJV4P}

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	2026-07-04T17:11:35.674911Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

672521907e867b55278514c545c935e3c328a8578fdc0e616d01e090eb3bacc4

Aliases

arxiv: 0806.4968 · arxiv_version: 0806.4968v1 · doi: 10.48550/arxiv.0806.4968 · pith_short_12: M4SSDED6QZ5V · pith_short_16: M4SSDED6QZ5VKJ4F · pith_short_8: M4SSDED6

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/M4SSDED6QZ5VKJ4FCTCULSJV4P \
  | 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: 672521907e867b55278514c545c935e3c328a8578fdc0e616d01e090eb3bacc4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aa678bf38f24453b48282fcd077ab436c5232e27f00be0a4731bcd3c1d869f3a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-06-30T18:44:30Z",
    "title_canon_sha256": "bf89b83020ef65953822a8fa24ff6b50345af2b69764e1e6f0b3f6b0eaef999e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0806.4968",
    "kind": "arxiv",
    "version": 1
  }
}