Pith Number

pith:J23PVYCV

pith:2023:J23PVYCVB2EQCBF3HK2ORSQF4E

not attested not anchored not stored refs pending

The recurrent nova T CrB had prior eruptions observed near December 1787 and October 1217 AD

Bradley E. Schaefer (Louisiana State University)

arxiv:2308.13668 v2 · 2023-08-25 · astro-ph.SR · physics.hist-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{J23PVYCVB2EQCBF3HK2ORSQF4E}

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	2026-07-05T07:19:48.313677Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4eb6fae0550e890104bb3ab4e8ca05e12c0bd2a59922b9547a87eba570aa54b9

Aliases

arxiv: 2308.13668 · arxiv_version: 2308.13668v2 · doi: 10.48550/arxiv.2308.13668 · pith_short_12: J23PVYCVB2EQ · pith_short_16: J23PVYCVB2EQCBF3 · pith_short_8: J23PVYCV

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/J23PVYCVB2EQCBF3HK2ORSQF4E \
  | 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: 4eb6fae0550e890104bb3ab4e8ca05e12c0bd2a59922b9547a87eba570aa54b9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a21840c50a90805b1458aaa08573230535250273179e2eaa30cd311359660edd",
    "cross_cats_sorted": [
      "physics.hist-ph"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2023-08-25T20:52:30Z",
    "title_canon_sha256": "ed4e5535439529370a3f20abdf1bb89a111eec44358121338a4db26deede7514"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2308.13668",
    "kind": "arxiv",
    "version": 2
  }
}