Pith Number

pith:S2R7QHZ7

pith:2015:S2R7QHZ7ERLBPWJVR3Z3U5ZWKJ

not attested not anchored not stored refs pending

Evolving into a remnant: optical observations of SN 1978K at three decades

H. Kuncarayakti, J. P. Anderson, K. Maeda, K. Nomoto, L. Galbany, M. Doi, M. Hamuy

arxiv:1512.02108 v2 · 2015-12-07 · astro-ph.SR · astro-ph.CO · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{S2R7QHZ7ERLBPWJVR3Z3U5ZWKJ}

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	2026-05-18T01:19:25.846949Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

96a3f81f3f245617d9358ef3ba7736524a1d23338a5a96b019d33d2a4f9dcbb3

Aliases

arxiv: 1512.02108 · arxiv_version: 1512.02108v2 · doi: 10.48550/arxiv.1512.02108 · pith_short_12: S2R7QHZ7ERLB · pith_short_16: S2R7QHZ7ERLBPWJV · pith_short_8: S2R7QHZ7

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/S2R7QHZ7ERLBPWJVR3Z3U5ZWKJ \
  | 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: 96a3f81f3f245617d9358ef3ba7736524a1d23338a5a96b019d33d2a4f9dcbb3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "298a9982b7a60a9b171cb9a0f88b70760289f3da8e2890865775c6a0491ddb90",
    "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": "2015-12-07T16:24:08Z",
    "title_canon_sha256": "bb1e73c73e419aafb8ceb003ee8415f678f5761ed0d55f081617b3615bcc19a9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.02108",
    "kind": "arxiv",
    "version": 2
  }
}