Pith Number

pith:ZSSEQ6NA

pith:2017:ZSSEQ6NA4L2RVBTW5DTTFELHCC

not attested not anchored not stored refs pending

An Improved Age-Activity Relationship for Cool Stars older than a Gigayear

C. A. Watson, K. Poppenhaeger, R. S. Booth, S. J. Wolk, V. Silva Aguirre

arxiv:1706.08979 v1 · 2017-06-27 · astro-ph.SR · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZSSEQ6NA4L2RVBTW5DTTFELHCC}

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	2026-05-18T00:38:02.016137Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cca44879a0e2f51a8676e8e732916710b9b15184fc6b92e8c4a098545b9ffaad

Aliases

arxiv: 1706.08979 · arxiv_version: 1706.08979v1 · doi: 10.48550/arxiv.1706.08979 · pith_short_12: ZSSEQ6NA4L2R · pith_short_16: ZSSEQ6NA4L2RVBTW · pith_short_8: ZSSEQ6NA

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/ZSSEQ6NA4L2RVBTW5DTTFELHCC \
  | 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: cca44879a0e2f51a8676e8e732916710b9b15184fc6b92e8c4a098545b9ffaad

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "802c67cd642757aa28d30face010098dc15e5b43c65dd5e1c0c4ea5bf2f95af9",
    "cross_cats_sorted": [
      "astro-ph.EP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2017-06-27T18:00:07Z",
    "title_canon_sha256": "3f471dba4e133c6ae4c87fb2155b894e021337d5a000a40214f3ffdcfc544737"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1706.08979",
    "kind": "arxiv",
    "version": 1
  }
}