Pith Number

pith:4WMTCA5C

pith:2013:4WMTCA5CW67GLCYKXH2USC7RRP

not attested not anchored not stored refs pending

Is the metallicity of the progenitor of long gamma-ray bursts really low?

Jing-Meng Hao, Ye-Fei Yuan

arxiv:1305.5165 v2 · 2013-05-22 · astro-ph.HE · 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{4WMTCA5CW67GLCYKXH2USC7RRP}

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	2026-05-18T03:18:28.820326Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e5993103a2b7be658b0ab9f5490bf18bc0a3558ffb21591ced76bba79aa077fc

Aliases

arxiv: 1305.5165 · arxiv_version: 1305.5165v2 · doi: 10.48550/arxiv.1305.5165 · pith_short_12: 4WMTCA5CW67G · pith_short_16: 4WMTCA5CW67GLCYK · pith_short_8: 4WMTCA5C

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/4WMTCA5CW67GLCYKXH2USC7RRP \
  | 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: e5993103a2b7be658b0ab9f5490bf18bc0a3558ffb21591ced76bba79aa077fc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b418ecc49365290e42191611a8ee7274d9dd5b5ae0df28463470c463becd11f9",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2013-05-22T15:11:15Z",
    "title_canon_sha256": "14d43862ce548fb47ecbb6bca72d0e627a9c51f98faa4f4dd3a2cfe4c31936e3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.5165",
    "kind": "arxiv",
    "version": 2
  }
}