Pith Number

pith:CWQ2MYXE

pith:2009:CWQ2MYXEG3HGANIP5MMVAZKXBF

not attested not anchored not stored refs pending

Beginning of the Super-Soft Phase of the Classical Nova V2491 Cygni

D. Takei, J.-U. Ness

arxiv:0911.4233 v2 · 2009-11-22 · 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	2026-05-18T02:10:37.730233Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

15a1a662e436ce60350feb195065570944dc0e57e3af50efb40b95073e2acdfd

Aliases

arxiv: 0911.4233 · arxiv_version: 0911.4233v2 · doi: 10.48550/arxiv.0911.4233 · pith_short_12: CWQ2MYXEG3HG · pith_short_16: CWQ2MYXEG3HGANIP · pith_short_8: CWQ2MYXE

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/CWQ2MYXEG3HGANIP5MMVAZKXBF \
  | 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: 15a1a662e436ce60350feb195065570944dc0e57e3af50efb40b95073e2acdfd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2ef2118d20f02a4db61d5771e0c5a0df32fae3aedaed3150039c467638201131",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-11-22T06:10:58Z",
    "title_canon_sha256": "7e37e83bfdb96b805fc42926e332b2e3c91ce96bc40fd6969fe887fa012375ac"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.4233",
    "kind": "arxiv",
    "version": 2
  }
}