Pith Number

pith:MSWIR2BH

pith:2009:MSWIR2BHD4CDEMPNT25U4QSULQ

not attested not anchored not stored refs pending

The Nucleosynthetic Imprint of 15-40 Solar Mass Primordial Supernovae on Metal-Poor Stars

A. Almgren, Alexander Heger, C. C. Joggerst, Daniel Whalen, J. Bell, S. E. Woosley

arxiv:0907.3885 v2 · 2009-07-22 · 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{MSWIR2BHD4CDEMPNT25U4QSULQ}

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	2026-05-18T02:12:54.619196Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

64ac88e8271f043231ed9ebb4e42545c3f3e777337e9e99906548a8191d72e63

Aliases

arxiv: 0907.3885 · arxiv_version: 0907.3885v2 · doi: 10.48550/arxiv.0907.3885 · pith_short_12: MSWIR2BHD4CD · pith_short_16: MSWIR2BHD4CDEMPN · pith_short_8: MSWIR2BH

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/MSWIR2BHD4CDEMPNT25U4QSULQ \
  | 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: 64ac88e8271f043231ed9ebb4e42545c3f3e777337e9e99906548a8191d72e63

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4127c769f5b6d3c4f473e2fa24c98cada6aec0b2f462468ff1c83cb3ada1aecc",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/3.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-07-22T18:24:19Z",
    "title_canon_sha256": "ba9624785b93b6173682d6b2e32305f47447601b88acc4bbb668e946a4564123"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.3885",
    "kind": "arxiv",
    "version": 2
  }
}