Pith Number

pith:4YMBM6JK

pith:2008:4YMBM6JK6PEAKDK7FLMLHMYRHE

not attested not anchored not stored refs pending

The Persistence of Memory, or How the X-Ray Spectrum of SNR 0509-67.5 Reveals the Brightness of its Parent Type Ia Supernova

Carles Badenes, Eduardo Bravo, Gamil Cassam-Chenai, John P. Hughes

arxiv:0801.4761 v1 · 2008-01-30 · 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{4YMBM6JK6PEAKDK7FLMLHMYRHE}

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	2026-07-04T17:09:04.607436Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e61816792af3c8050d5f2ad8b3b311390fbe527fcdcc7def087f1c0102a8cf59

Aliases

arxiv: 0801.4761 · arxiv_version: 0801.4761v1 · doi: 10.48550/arxiv.0801.4761 · pith_short_12: 4YMBM6JK6PEA · pith_short_16: 4YMBM6JK6PEAKDK7 · pith_short_8: 4YMBM6JK

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/4YMBM6JK6PEAKDK7FLMLHMYRHE \
  | 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: e61816792af3c8050d5f2ad8b3b311390fbe527fcdcc7def087f1c0102a8cf59

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a599f64b58fe3d0ab9fadb7cf4b96f2180573df93020e44e5c5615c8aa36c281",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-01-30T21:01:20Z",
    "title_canon_sha256": "f600f4f1f0e2b1c395539d32f0c525f56c1f1d6ac1717e52cea20e505b1b471e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0801.4761",
    "kind": "arxiv",
    "version": 1
  }
}