Pith Number

pith:UDHAFA2V

pith:2011:UDHAFA2VIG36MQCD3TBG4O2AX3

not attested not anchored not stored refs pending

HD 49933: A laboratory for magnetic activity cycles

D. Salabert, G.R. Davies, J. Ballot, R.A. Garcia, S. Mathur, T. Ceillier, T.S. Metcalfe

arxiv:1110.0307 v1 · 2011-10-03 · 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{UDHAFA2VIG36MQCD3TBG4O2AX3}

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	2026-05-18T04:11:50.285833Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a0ce02835541b7e64043dcc26e3b40bef1e7e5922bf14c5432a0d6cd0b48e9d4

Aliases

arxiv: 1110.0307 · arxiv_version: 1110.0307v1 · doi: 10.48550/arxiv.1110.0307 · pith_short_12: UDHAFA2VIG36 · pith_short_16: UDHAFA2VIG36MQCD · pith_short_8: UDHAFA2V

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/UDHAFA2VIG36MQCD3TBG4O2AX3 \
  | 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: a0ce02835541b7e64043dcc26e3b40bef1e7e5922bf14c5432a0d6cd0b48e9d4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "91ca6546d31fe2072843893c74fecbc7ddb2b7cef4e599778ef4d8f2b1bbaed7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2011-10-03T09:28:46Z",
    "title_canon_sha256": "4761ee5b803f0398f91b746d4e23c19fb8149b523a9fb90325fdaeba82801e9d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1110.0307",
    "kind": "arxiv",
    "version": 1
  }
}