Pith Number

pith:FQVT3F5X

pith:2012:FQVT3F5XMGEWPIQQTPLKO3A4PG

not attested not anchored not stored refs pending

Carbon Detection in Early-Time Optical Spectra of Type Ia Supernovae

Alexei V. Filippenko, Jeffrey M. Silverman

arxiv:1202.3788 v3 · 2012-02-16 · astro-ph.CO

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

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	2026-05-18T01:19:48.940591Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2c2b3d97b7618967a2109bd6a76c1c79a97ecc5e34a8c884312dab7f28203cd5

Aliases

arxiv: 1202.3788 · arxiv_version: 1202.3788v3 · doi: 10.48550/arxiv.1202.3788 · pith_short_12: FQVT3F5XMGEW · pith_short_16: FQVT3F5XMGEWPIQQ · pith_short_8: FQVT3F5X

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/FQVT3F5XMGEWPIQQTPLKO3A4PG \
  | 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: 2c2b3d97b7618967a2109bd6a76c1c79a97ecc5e34a8c884312dab7f28203cd5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2641258dea641c5707bb39ed3a6079f75775a6de611eb54a4c147b3a181cf715",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-02-16T21:00:07Z",
    "title_canon_sha256": "15ccfc805dcbec4f63405b8c96221ef56a7a6dca2024e3fbca49ae2a3ab6c08e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.3788",
    "kind": "arxiv",
    "version": 3
  }
}