Pith Number

pith:BUY5UJZB

pith:2009:BUY5UJZBU42GGR4R4NUCTDUPXF

not attested not anchored not stored refs pending

The Sun in Time: Age, Rotation, and Magnetic Activity of the Sun and Solar-type Stars and Effects on Hosted Planets

Edward F. Guinan, Scott G. Engle

arxiv:0903.4148 v1 · 2009-03-24 · 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{BUY5UJZBU42GGR4R4NUCTDUPXF}

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	2026-05-18T02:14:26.189886Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0d31da2721a734634791e368298e8fb97893dd4df223a1b74a9f843013752dec

Aliases

arxiv: 0903.4148 · arxiv_version: 0903.4148v1 · doi: 10.48550/arxiv.0903.4148 · pith_short_12: BUY5UJZBU42G · pith_short_16: BUY5UJZBU42GGR4R · pith_short_8: BUY5UJZB

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/BUY5UJZBU42GGR4R4NUCTDUPXF \
  | 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: 0d31da2721a734634791e368298e8fb97893dd4df223a1b74a9f843013752dec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0d733780d5ef044dd702bafbe37eb29f9a7e32f8772baf0f3ad6da8450de10de",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-03-24T18:09:04Z",
    "title_canon_sha256": "a8fafa0cf3edd5fd697fa3090ff74546202e90f3efad32dfe2655ccea61f4b28"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.4148",
    "kind": "arxiv",
    "version": 1
  }
}