Pith Number

pith:4NOBPQDK

pith:2013:4NOBPQDKB6LDJZXTCA7WHZW55G

not attested not anchored not stored refs pending

Silicon carbide grains of type C provide evidence for the production of the unstable isotope $^{32}$Si in supernovae

C. Fryer, E. Zinner, F. Herwig, F.-K. Thielemann, F.X. Timmes, M.G. Bertolli, M. Pignatari, P. Hoppe, R. Hirschi, R. Trappitsch, T. Rauscher

arxiv:1306.3670 v1 · 2013-06-16 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4NOBPQDKB6LDJZXTCA7WHZW55G}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T03:20:46.835896Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e35c17c06a0f9634e6f3103f63e6dde998a5a3f99f871ef9af3fc27b9cb27462

Aliases

arxiv: 1306.3670 · arxiv_version: 1306.3670v1 · doi: 10.48550/arxiv.1306.3670 · pith_short_12: 4NOBPQDKB6LD · pith_short_16: 4NOBPQDKB6LDJZXT · pith_short_8: 4NOBPQDK

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/4NOBPQDKB6LDJZXTCA7WHZW55G \
  | 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: e35c17c06a0f9634e6f3103f63e6dde998a5a3f99f871ef9af3fc27b9cb27462

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "72cfb14c07ba509013b754633c1d238067b2b898f7ab2d4979ba3c8acf4dc94d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2013-06-16T15:45:28Z",
    "title_canon_sha256": "60e1ab2f70559c4691d672ff22a2580b6769ed2a0a06ff27c9a68d507f1c70f2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.3670",
    "kind": "arxiv",
    "version": 1
  }
}