Pith Number

pith:EL374JPU

pith:2009:EL374JPU3L7KFYKLBVAI66SEWY

not attested not anchored not stored refs pending

Sounding stellar cycles with Kepler - preliminary results from ground-based chromospheric activity measurements

C. Karoff, D. Buzasi, F. Grundahl, H. Kjeldsen, J. Christensen-Dalsgaard, S. Frandsen, T. Arentoft, T.S. Metcalfe, W.J. Chaplin

arxiv:0910.1436 v1 · 2009-10-08 · 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{EL374JPU3L7KFYKLBVAI66SEWY}

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	2026-05-18T02:11:25.621410Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

22f7fe25f4dafea2e14b0d408f7a44b636bf11e8aec29f23d58b54dc19528e41

Aliases

arxiv: 0910.1436 · arxiv_version: 0910.1436v1 · doi: 10.48550/arxiv.0910.1436 · pith_short_12: EL374JPU3L7K · pith_short_16: EL374JPU3L7KFYKL · pith_short_8: EL374JPU

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/EL374JPU3L7KFYKLBVAI66SEWY \
  | 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: 22f7fe25f4dafea2e14b0d408f7a44b636bf11e8aec29f23d58b54dc19528e41

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "994d9799ec35826a0d70d5f9bac43bd50e0514304b0a6840a56a527b58d54dd2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-10-08T07:54:25Z",
    "title_canon_sha256": "0486d31d069d506ae6455ba3c7d8f6688c215494f2fd3ef520980e7b53efcd41"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.1436",
    "kind": "arxiv",
    "version": 1
  }
}