Pith Number

pith:BXL4R2XK

pith:2009:BXL4R2XK6JODNFTK5QWE53YEYO

not attested not anchored not stored refs pending

Novae Ejecta as Colliding Shells

Elena Mason, Robert Williams

arxiv:0908.3810 v2 · 2009-08-26 · astro-ph.HE · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BXL4R2XK6JODNFTK5QWE53YEYO}

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	2026-05-18T02:12:22.745003Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0dd7c8eaeaf25c36966aec2c4eef04c39e5286f9c31dd55ba713e1e58059ef7a

Aliases

arxiv: 0908.3810 · arxiv_version: 0908.3810v2 · doi: 10.48550/arxiv.0908.3810 · pith_short_12: BXL4R2XK6JOD · pith_short_16: BXL4R2XK6JODNFTK · pith_short_8: BXL4R2XK

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/BXL4R2XK6JODNFTK5QWE53YEYO \
  | 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: 0dd7c8eaeaf25c36966aec2c4eef04c39e5286f9c31dd55ba713e1e58059ef7a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2b4c646a2bfea89ab0f4a54875bb1a668fd1261154eb321d2ad1ca91e7e28bf1",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-08-26T13:07:46Z",
    "title_canon_sha256": "f55d61ccc61e60bf76dc6ee59e9b4aad3e99565d046dce98bd73853447e36de9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.3810",
    "kind": "arxiv",
    "version": 2
  }
}