Pith Number

pith:GDB74FWL

pith:2013:GDB74FWL6GV5BQJDPRYNRWR6TF

not attested not anchored not stored refs pending

The Supernova that Destroyed a Protogalaxy: Prompt Chemical Enrichment and Supermassive Black Hole Growth

Alexander Heger, Avery Meiksin, Chris L. Fryer, Daniel J. Whalen, Jarrett J. Johnson, Joseph Smidt, Wesley Even

arxiv:1305.6966 v2 · 2013-05-29 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GDB74FWL6GV5BQJDPRYNRWR6TF}

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	2026-05-18T01:49:39.942874Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

30c3fe16cbf1abd0c1237c70d8da3e995086d3ccd91c73d70b82eb83f92d7364

Aliases

arxiv: 1305.6966 · arxiv_version: 1305.6966v2 · doi: 10.48550/arxiv.1305.6966 · pith_short_12: GDB74FWL6GV5 · pith_short_16: GDB74FWL6GV5BQJD · pith_short_8: GDB74FWL

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/GDB74FWL6GV5BQJDPRYNRWR6TF \
  | 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: 30c3fe16cbf1abd0c1237c70d8da3e995086d3ccd91c73d70b82eb83f92d7364

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2529e3b40d8e9b92098346b5cff75285a3a846a7a31bb273f925bf87a9cda5a2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-05-29T22:01:28Z",
    "title_canon_sha256": "4e92ed6839a7cfa3f4daa2c07b71d71e57dcbe7b0f9e06f68727a3a3218476d7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.6966",
    "kind": "arxiv",
    "version": 2
  }
}