Pith Number

pith:OTJ6Q7WH

pith:2004:OTJ6Q7WHG6F33YOVJMZMMKWQYI

not attested not anchored not stored refs pending

Fine structure of the chromospheric activity in Solar-type stars - The Halpha Line

G. F. Porto de Mello, W. Lyra

arxiv:astro-ph/0410438 v2 · 2004-10-19 · 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{OTJ6Q7WHG6F33YOVJMZMMKWQYI}

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	2026-05-18T01:40:34.931858Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

74d3e87ec7378bbde1d54b32c62ad0c2367923d534a41c4f668c4c4877c9e622

Aliases

arxiv: astro-ph/0410438 · arxiv_version: astro-ph/0410438v2 · doi: 10.48550/arxiv.astro-ph/0410438 · pith_short_12: OTJ6Q7WHG6F3 · pith_short_16: OTJ6Q7WHG6F33YOV · pith_short_8: OTJ6Q7WH

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/OTJ6Q7WHG6F33YOVJMZMMKWQYI \
  | 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: 74d3e87ec7378bbde1d54b32c62ad0c2367923d534a41c4f668c4c4877c9e622

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5dbd9829ddb2d71e7662698faef25e678d7f1f8ed44a6df03d5ddeb08996b54c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-10-19T14:36:32Z",
    "title_canon_sha256": "96f40e971c34385ca150e0290ef065148ed93b5e4b0d8dd90554eda02f131705"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0410438",
    "kind": "arxiv",
    "version": 2
  }
}