Pith Number

pith:O26YFCXS

pith:2017:O26YFCXSCPKSCBMQX2IRV2CAXZ

not attested not anchored not stored refs pending

Fifteen years in the high-energy life of the solar-type star HD 81809. XMM-Newton observations of a stellar activity cycle

A. Maggio, F. Favata, G. Micela, J.H.M.M. Schmitt, J. Robrade, M. Mittag, S. Orlando, S. Sciortino

arxiv:1707.06437 v1 · 2017-07-20 · 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{O26YFCXSCPKSCBMQX2IRV2CAXZ}

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	2026-05-18T00:35:58.278576Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

76bd828af213d5210590be911ae840be5bfb22d0b0177a66f7765f4a2ce6150b

Aliases

arxiv: 1707.06437 · arxiv_version: 1707.06437v1 · doi: 10.48550/arxiv.1707.06437 · pith_short_12: O26YFCXSCPKS · pith_short_16: O26YFCXSCPKSCBMQ · pith_short_8: O26YFCXS

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/O26YFCXSCPKSCBMQX2IRV2CAXZ \
  | 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: 76bd828af213d5210590be911ae840be5bfb22d0b0177a66f7765f4a2ce6150b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7a43e494fb4fa0dd5f3204f98770c4ab353bb6bff24af0f4add15cb2e878b8c4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2017-07-20T10:16:38Z",
    "title_canon_sha256": "249486a0607f19f8c54b07dce0ce15bdaacc0dbddc623fc195fa9d715d6cf187"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1707.06437",
    "kind": "arxiv",
    "version": 1
  }
}