Pith Number

pith:327GOUW2

pith:2013:327GOUW2SIZQDJRGAEMFHUDCK4

not attested not anchored not stored refs pending

The Firm Redshift Lower Limit of the Most Distant TeV-Detected Blazar PKS 1424+240

A. Furniss, A. V. Filippenko, C. Danforth, C. M. Urry, D. A. Williams, J. Primack, J. Stocke, J. X. Prochaska, M. Fumagalli, W. Neely

arxiv:1304.4859 v2 · 2013-04-17 · astro-ph.HE

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{327GOUW2SIZQDJRGAEMFHUDCK4}

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	2026-05-18T01:50:31.617095Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

debe6752da923301a626011853d0625728d4667e5597532ae36c92a3f040582d

Aliases

arxiv: 1304.4859 · arxiv_version: 1304.4859v2 · doi: 10.48550/arxiv.1304.4859 · pith_short_12: 327GOUW2SIZQ · pith_short_16: 327GOUW2SIZQDJRG · pith_short_8: 327GOUW2

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/327GOUW2SIZQDJRGAEMFHUDCK4 \
  | 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: debe6752da923301a626011853d0625728d4667e5597532ae36c92a3f040582d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "27b16b769b350775dc1dca2a3caab2037441cadb6c4c589f58891b0e9124b137",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2013-04-17T15:29:21Z",
    "title_canon_sha256": "eeeeefa7d94f91aba18fa163149f656f1625743d39651e3261ead77902529a94"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.4859",
    "kind": "arxiv",
    "version": 2
  }
}