Pith Number

pith:2MR5LBQR

pith:1999:2MR5LBQRMATMKSXJMSTKCDE67G

not attested not anchored not stored refs pending

A Re-interpretation of Historical References to the Supernova of 1054 AD

George W. Collins, II, John C. Martin, William P. Claspy

arxiv:astro-ph/9904285 v2 · 1999-04-21 · 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{2MR5LBQRMATMKSXJMSTKCDE67G}

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	2026-05-18T03:47:42.474736Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d323d586116026c54ae964a6a10c9ef99a3879538184a12833d461f0bfd3add4

Aliases

arxiv: astro-ph/9904285 · arxiv_version: astro-ph/9904285v2 · doi: 10.48550/arxiv.astro-ph/9904285 · pith_short_12: 2MR5LBQRMATM · pith_short_16: 2MR5LBQRMATMKSXJ · pith_short_8: 2MR5LBQR

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/2MR5LBQRMATMKSXJMSTKCDE67G \
  | 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: d323d586116026c54ae964a6a10c9ef99a3879538184a12833d461f0bfd3add4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9ff69b7d3ae494b7658458a8ab8a6367c90a8406db9aee4d2e3dcacc93cdf474",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-04-21T14:13:18Z",
    "title_canon_sha256": "0cb008e0de74c27159ec6bf4b2a4ee851c21e5d9480394217fc6bb9d24678e8e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9904285",
    "kind": "arxiv",
    "version": 2
  }
}