Pith Number

pith:JLAN26M2

pith:2016:JLAN26M2PICW3MQ5VCESEEZQBM

not attested not anchored not stored refs pending

A high mass progenitor for the Type Ic Supernova 2007gr inferred from its environment

Enrico Ramirez-Ruiz (UCSC), Justyn Maund (Sheffield)

arxiv:1609.07740 v1 · 2016-09-25 · astro-ph.SR · astro-ph.GA · 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{JLAN26M2PICW3MQ5VCESEEZQBM}

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	2026-05-18T01:03:55.598834Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4ac0dd799a7a056db21da8892213300b33de12806e9c222c6ddda3b8031c36ee

Aliases

arxiv: 1609.07740 · arxiv_version: 1609.07740v1 · doi: 10.48550/arxiv.1609.07740 · pith_short_12: JLAN26M2PICW · pith_short_16: JLAN26M2PICW3MQ5 · pith_short_8: JLAN26M2

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/JLAN26M2PICW3MQ5VCESEEZQBM \
  | 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: 4ac0dd799a7a056db21da8892213300b33de12806e9c222c6ddda3b8031c36ee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9ab4f608af030b5f52f2ec88be5a5205947e0b73650f8ab7a8299620a524b8ac",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2016-09-25T13:29:13Z",
    "title_canon_sha256": "11489b80244a7fbfa46da66ba50b566857e0b4afab7570b56bf80944c6f45010"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1609.07740",
    "kind": "arxiv",
    "version": 1
  }
}