Pith Number

pith:23SXJUKG

pith:2009:23SXJUKGY3N7CZYSGUHCHCD5TO

not attested not anchored not stored refs pending

Long Secondary Periods in Variable Red Giants

C. P. Nicholls, I. Soszy\'nski, M.-R. L. Cioni, P. R. Wood

arxiv:0907.2975 v1 · 2009-07-17 · 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{23SXJUKGY3N7CZYSGUHCHCD5TO}

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	2026-05-18T02:12:56.325060Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d6e574d146c6dbf16712350e23887d9bbf686f2a7adf418c8ec47817b7b71348

Aliases

arxiv: 0907.2975 · arxiv_version: 0907.2975v1 · doi: 10.48550/arxiv.0907.2975 · pith_short_12: 23SXJUKGY3N7 · pith_short_16: 23SXJUKGY3N7CZYS · pith_short_8: 23SXJUKG

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/23SXJUKGY3N7CZYSGUHCHCD5TO \
  | 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: d6e574d146c6dbf16712350e23887d9bbf686f2a7adf418c8ec47817b7b71348

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "17940d42f0be16f2ab1ef7f6dfc7d8edf8dfde3da89ab9e43854b63e0809b160",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-07-17T04:28:18Z",
    "title_canon_sha256": "68584c4c825def286ece9b7ce9283d1cd3a7b1d2ef78d52d776f569e5849e809"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.2975",
    "kind": "arxiv",
    "version": 1
  }
}