Pith Number

pith:NAZ7MQPC

pith:1999:NAZ7MQPCFNENSAJTYQM5FZEZ3B

not attested not anchored not stored refs pending

Empirical estimate of p-mode frequency shift for solar cycle 23

A. Bhatnagar, B. Kumar, Kiran Jain, S.C. Tripathy

arxiv:astro-ph/9912518 v1 · 1999-12-27 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NAZ7MQPCFNENSAJTYQM5FZEZ3B}

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	2026-05-18T01:40:12.199470Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6833f641e22b48d90133c419d2e499d872fd13212e6cc233f84cc84c7366e9ac

Aliases

arxiv: astro-ph/9912518 · arxiv_version: astro-ph/9912518v1 · doi: 10.48550/arxiv.astro-ph/9912518 · pith_short_12: NAZ7MQPCFNEN · pith_short_16: NAZ7MQPCFNENSAJT · pith_short_8: NAZ7MQPC

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/NAZ7MQPCFNENSAJTYQM5FZEZ3B \
  | 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: 6833f641e22b48d90133c419d2e499d872fd13212e6cc233f84cc84c7366e9ac

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "910a1552908a8d96b3c01d60732cce1d44bf7fe7df23b6a418605bd3f346f9d7",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-12-27T12:03:35Z",
    "title_canon_sha256": "12c7315f30957a3af2f780828a72d971b5ff267a8981f65ef8997f1e47aa0425"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9912518",
    "kind": "arxiv",
    "version": 1
  }
}