Pith Number

pith:VFP3SRWV

pith:2013:VFP3SRWVI2ECSDH6FBFN66VX6Q

not attested not anchored not stored refs pending

Keck Spectroscopy of Gravitationally Lensed z=4 Galaxies: Improved Constraints on the Escape Fraction of Ionizing Photons

Daniel P. Stark, Matthew A. Schenker, Richard S. Ellis, Tucker Jones

arxiv:1304.7015 v2 · 2013-04-25 · 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{VFP3SRWVI2ECSDH6FBFN66VX6Q}

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	2026-05-18T01:50:21.660765Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a95fb946d54688290cfe284adf7ab7f4141b472fc85df10403c7f3c9065c35b2

Aliases

arxiv: 1304.7015 · arxiv_version: 1304.7015v2 · doi: 10.48550/arxiv.1304.7015 · pith_short_12: VFP3SRWVI2EC · pith_short_16: VFP3SRWVI2ECSDH6 · pith_short_8: VFP3SRWV

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/VFP3SRWVI2ECSDH6FBFN66VX6Q \
  | 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: a95fb946d54688290cfe284adf7ab7f4141b472fc85df10403c7f3c9065c35b2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "25eed911b1c574f4eecb587fb62c736a6402b097cac5fdd5fab77f122d879510",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-04-25T20:06:36Z",
    "title_canon_sha256": "b7c799374bdc2b4d61cbe3a993fa0bd8bb370e0d5b3f9d51c55b03df7d4fadd1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.7015",
    "kind": "arxiv",
    "version": 2
  }
}