Pith Number

pith:2EQ4QDPE

pith:1999:2EQ4QDPEWGC7IKTW2F6QXR5CK3

not attested not anchored not stored refs pending

The Lick Observatory Supernova Search

A. Friedman, A.V. Filippenko, E. Halderson, J.Y. King, M. Modjaz, M. Papenkova, R.A. Johnson, R.R. Treffers, T. Shefler, W.D. Li, Y. Sato

arxiv:astro-ph/9912336 v1 · 1999-12-16 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2EQ4QDPEWGC7IKTW2F6QXR5CK3}

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	2026-07-04T16:12:01.489038Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d121c80de4b185f42a76d17d0bc7a256d6f670247e483e28825e020aaffc4eef

Aliases

arxiv: astro-ph/9912336 · arxiv_version: astro-ph/9912336v1 · doi: 10.48550/arxiv.astro-ph/9912336 · pith_short_12: 2EQ4QDPEWGC7 · pith_short_16: 2EQ4QDPEWGC7IKTW · pith_short_8: 2EQ4QDPE

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/2EQ4QDPEWGC7IKTW2F6QXR5CK3 \
  | 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: d121c80de4b185f42a76d17d0bc7a256d6f670247e483e28825e020aaffc4eef

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "536592912ecff2210a132641fdacbc939c802e5417159e70520a1560d66c66d1",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-12-16T00:55:32Z",
    "title_canon_sha256": "cc8e25551c84a63bd319407370617b85a2ffc3426d545036f5a6bc3d292178f5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9912336",
    "kind": "arxiv",
    "version": 1
  }
}