Pith Number

pith:34STODS5

pith:1993:34STODS5DHEI6CZJKJSBNVNTOY

not attested not anchored not stored refs pending

A forgotten episode of the $\eta ~Car$ light curve in 1860-1865

R. Viotti, V.F. Polcaro

arxiv:astro-ph/9305024 v1 · 1993-05-19 · 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{34STODS5DHEI6CZJKJSBNVNTOY}

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	2026-05-18T04:21:41.321107Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

df25370e5d19c88f0b29526416d5b376375327da61bbaa13732b0a60d0dcc30b

Aliases

arxiv: astro-ph/9305024 · arxiv_version: astro-ph/9305024v1 · doi: 10.48550/arxiv.astro-ph/9305024 · pith_short_12: 34STODS5DHEI · pith_short_16: 34STODS5DHEI6CZJ · pith_short_8: 34STODS5

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/34STODS5DHEI6CZJKJSBNVNTOY \
  | 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: df25370e5d19c88f0b29526416d5b376375327da61bbaa13732b0a60d0dcc30b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c02891025d1d21f18c98e454fe31c5e25d3a4c92f80231f8666f89fc65571f11",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1993-05-19T16:17:51Z",
    "title_canon_sha256": "c50ac697f46e49142933bdeed131b8122e6e0304d3adbdd942d9f6cdd9086c37"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9305024",
    "kind": "arxiv",
    "version": 1
  }
}