Pith Number

pith:OIZIRDIP

pith:2018:OIZIRDIPUPSFF2AID2QXQO4YWD

not attested not anchored not stored refs pending

Periodic Variability of the Barium Central Star of the Planetary Nebula Abell 70

2), (2) Space Telescope Science Institute), Howard E. Bond (1, Penn State, Robin Ciardullo (1) ((1) Dept. of Astronomy & Astrophysics

arxiv:1808.01251 v1 · 2018-08-03 · 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{OIZIRDIPUPSFF2AID2QXQO4YWD}

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	2026-05-18T00:08:58.503207Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7232888d0fa3e452e8081ea1783b98b0c7b4e469cf751c23d3e4424063a25b68

Aliases

arxiv: 1808.01251 · arxiv_version: 1808.01251v1 · doi: 10.48550/arxiv.1808.01251 · pith_short_12: OIZIRDIPUPSF · pith_short_16: OIZIRDIPUPSFF2AI · pith_short_8: OIZIRDIP

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/OIZIRDIPUPSFF2AID2QXQO4YWD \
  | 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: 7232888d0fa3e452e8081ea1783b98b0c7b4e469cf751c23d3e4424063a25b68

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a5e6b02a37e3ee02d694b5eb5af3b332dcc0ff531f9f9390b6340390964f92fd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-08-03T16:36:20Z",
    "title_canon_sha256": "cb6ff115e6806c39930bfd37f889ad6eaaef5a1cfb83bf81f9ca63afd6349eeb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.01251",
    "kind": "arxiv",
    "version": 1
  }
}