Pith Number

pith:P2NMWQPR

pith:2016:P2NMWQPRWIV4F62LWKIPBMJXPA

not attested not anchored not stored refs pending

After the Fall: Late-Time Spectroscopy of Type IIP Supernovae

Alexei V. Filippenko, G. H. Marion, J. Craig Wheeler, Jeffrey M. Silverman, Joseph C. Shields, Jozsef Vinko, Kelsey I. Clubb, Melissa L. Graham, Patrick L. Kelly, Ryan Chornock, Ryan J. Foley, S. Bradley Cenko, Stephanie Pickett, Thomas Matheson

arxiv:1610.07654 v3 · 2016-10-24 · astro-ph.SR · astro-ph.CO · astro-ph.HE

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	2026-05-18T00:52:38.252621Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7e9acb41f1b22bc2fb4bb290f0b1377813d9d9e385e4fc903dad0972458ba0ca

Aliases

arxiv: 1610.07654 · arxiv_version: 1610.07654v3 · doi: 10.48550/arxiv.1610.07654 · pith_short_12: P2NMWQPRWIV4 · pith_short_16: P2NMWQPRWIV4F62L · pith_short_8: P2NMWQPR

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/P2NMWQPRWIV4F62LWKIPBMJXPA \
  | 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: 7e9acb41f1b22bc2fb4bb290f0b1377813d9d9e385e4fc903dad0972458ba0ca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bbb7583f02e1884ae4113feb1d45a0c85a7eae2dd438dd2992a55d3d2154953a",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2016-10-24T21:05:55Z",
    "title_canon_sha256": "ae9ecf183af4cdc66dc0dbce1884c08e2305a2f600c449164d9295c1fe6a2d8a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1610.07654",
    "kind": "arxiv",
    "version": 3
  }
}