Pith Number

pith:D7QK2XNU

pith:2019:D7QK2XNUQAFFYYTN7G336QVXI7

not attested not anchored not stored refs pending

The Escape Fraction of Ionizing Photons During the Epoch of Reionization: observability with the Square Kilometre Array

Anne Hutter, Darren Croton, Jacob Seiler, Manodeep Sinha

arxiv:1902.01611 v2 · 2019-02-05 · 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{D7QK2XNUQAFFYYTN7G336QVXI7}

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	2026-05-17T23:40:39.066550Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1fe0ad5db4800a5c626df9b7bf42b747efeb8007c1e7dbb3ee81d7f10ffb1fc1

Aliases

arxiv: 1902.01611 · arxiv_version: 1902.01611v2 · doi: 10.48550/arxiv.1902.01611 · pith_short_12: D7QK2XNUQAFF · pith_short_16: D7QK2XNUQAFFYYTN · pith_short_8: D7QK2XNU

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/D7QK2XNUQAFFYYTN7G336QVXI7 \
  | 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: 1fe0ad5db4800a5c626df9b7bf42b747efeb8007c1e7dbb3ee81d7f10ffb1fc1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3770f0c6a5b3ff461cc565c73c0d4478569ceff2099679bd3cda50782fd24fc0",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-02-05T09:42:34Z",
    "title_canon_sha256": "65f2ec38edce4785ddff3a774bc8084b419b40a58b9f2545abc50c3a26acccf2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.01611",
    "kind": "arxiv",
    "version": 2
  }
}