Pith Number

pith:QL4L722I

pith:2015:QL4L722IFKITINVARFXT2L5XAN

not attested not anchored not stored refs pending

PopIII signatures in the spectra of PopII/I GRBs

B. Ciardi, Q. Ma, R. Salvaterra, U. Maio

arxiv:1503.01118 v1 · 2015-03-03 · astro-ph.GA · 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{QL4L722IFKITINVARFXT2L5XAN}

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	2026-05-18T01:40:53.547100Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

82f8bfeb482a913436a0896f3d2fb7035fe3ca516b4d7edd9c2f1dcf894c12f9

Aliases

arxiv: 1503.01118 · arxiv_version: 1503.01118v1 · doi: 10.48550/arxiv.1503.01118 · pith_short_12: QL4L722IFKIT · pith_short_16: QL4L722IFKITINVA · pith_short_8: QL4L722I

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/QL4L722IFKITINVARFXT2L5XAN \
  | 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: 82f8bfeb482a913436a0896f3d2fb7035fe3ca516b4d7edd9c2f1dcf894c12f9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1e95133a911607f119b182e286f6314bf1768a43599b2076dc53ef09b6db38b2",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-03-03T21:00:12Z",
    "title_canon_sha256": "ca5fd0ea3e1914563f6adfe5f4e7556e4cd465312ef6d26560e2ccda7287bc85"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.01118",
    "kind": "arxiv",
    "version": 1
  }
}