Pith Number

pith:5TYXBGOS

pith:2008:5TYXBGOSHADJNRKIQRQBMCH43I

not attested not anchored not stored refs pending

Scattered-Light Echoes from the Historical Galactic Supernovae Cassiopeia A and Tycho (SN 1572)

A. C. Becker, A. Clocchiatti, A. Garg, A. Rest, D. L. Welch, D. Minniti, G. Damke, H. Lanning, J. L. Prieto, K. H. Cook, K. Olsen, L. Oaster, M. Bergmann, M. E. Huber, N. B. Suntzeff, P. Challis, R. C. Smith, T. Matheson, W. M. Wood-Vasey

arxiv:0805.4607 v1 · 2008-05-29 · 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{5TYXBGOSHADJNRKIQRQBMCH43I}

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	2026-07-04T17:11:03.317775Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ecf17099d2380696c54884601608fcda094debe1471a9de521d73d9e5a596f3f

Aliases

arxiv: 0805.4607 · arxiv_version: 0805.4607v1 · doi: 10.48550/arxiv.0805.4607 · pith_short_12: 5TYXBGOSHADJ · pith_short_16: 5TYXBGOSHADJNRKI · pith_short_8: 5TYXBGOS

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/5TYXBGOSHADJNRKIQRQBMCH43I \
  | 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: ecf17099d2380696c54884601608fcda094debe1471a9de521d73d9e5a596f3f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3a61bf371d286b8bdc6b995e7f24e96b8445a7a41f6ce35d6b06309d7d67896a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-05-29T19:28:29Z",
    "title_canon_sha256": "bf47bdab35c9a984509f85f9a45fde0ff91e076554adf625d74e2df1002598af"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0805.4607",
    "kind": "arxiv",
    "version": 1
  }
}