Pith Number

pith:QV24XYAW

pith:2015:QV24XYAWQBBEGH3XJB76CPKSU5

not attested not anchored not stored refs pending

A rise in the ionizing photons in star-forming galaxies over the past 5 billion years

Dan Fabricant, H. Jabran Zahid, Ho Seong Hwang, Lisa J. Kewley, Margaret J. Geller, Michael A. Dopita

arxiv:1507.07932 v1 · 2015-07-28 · 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{QV24XYAWQBBEGH3XJB76CPKSU5}

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	2026-05-18T01:29:45.229269Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8575cbe0168042431f77487fe13d52a747f29294a3204e5cc88c7915e90cba7a

Aliases

arxiv: 1507.07932 · arxiv_version: 1507.07932v1 · doi: 10.48550/arxiv.1507.07932 · pith_short_12: QV24XYAWQBBE · pith_short_16: QV24XYAWQBBEGH3X · pith_short_8: QV24XYAW

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/QV24XYAWQBBEGH3XJB76CPKSU5 \
  | 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: 8575cbe0168042431f77487fe13d52a747f29294a3204e5cc88c7915e90cba7a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "242179ba0f5865d0600ce826c99397474c0619293ce37b06c75fc267f91ab067",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-07-28T20:00:39Z",
    "title_canon_sha256": "cedea136279b0b28ea66070f16de0144e0f14de9fe862bc884d0197f71a56e00"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.07932",
    "kind": "arxiv",
    "version": 1
  }
}