Pith Number

pith:3L2WEA7Q

pith:2013:3L2WEA7QZPMP7ZRW32EDZA4HWH

not attested not anchored not stored refs pending

Tracers of chromospheric structure. I. CaII H$\&$K emission distribution of 13000 F, G and K stars in SDSS DR7 spectroscopic sample

A. L. Luo, G. Zhao, J. K. Zhao, L. Y. Zhang, Q. H. Lu, T. D. Oswalt

arxiv:1304.3537 v1 · 2013-04-12 · 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{3L2WEA7QZPMP7ZRW32EDZA4HWH}

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	2026-05-18T01:50:33.571417Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

daf56203f0cbd8ffe636de883c8387b1dca3dcf66904bd0bf30320cc0be7723a

Aliases

arxiv: 1304.3537 · arxiv_version: 1304.3537v1 · doi: 10.48550/arxiv.1304.3537 · pith_short_12: 3L2WEA7QZPMP · pith_short_16: 3L2WEA7QZPMP7ZRW · pith_short_8: 3L2WEA7Q

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/3L2WEA7QZPMP7ZRW32EDZA4HWH \
  | 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: daf56203f0cbd8ffe636de883c8387b1dca3dcf66904bd0bf30320cc0be7723a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a5850608d445db6df56489964291d07c10fef6e293a2674ea82539d4acd374ab",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2013-04-12T04:58:00Z",
    "title_canon_sha256": "7024301a136f9183e89b1fcd659dff55128968d2a6453cb5035180f5d0a1707c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.3537",
    "kind": "arxiv",
    "version": 1
  }
}