Pith Number

pith:Z74PURQI

pith:2011:Z74PURQIIYHHIF6IYSKEK65TJW

not attested not anchored not stored refs pending

An unbiased sample of bright southern Compact Steep Spectrum and Gigahertz Peaked Spectrum Sources

Andrew M. Hopkins, Kate E. Randall, Philip G. Edwards, Ray P. Norris

arxiv:1105.4676 v2 · 2011-05-24 · 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{Z74PURQIIYHHIF6IYSKEK65TJW}

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	2026-05-18T02:01:52.002817Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cff8fa4608460e7417c8c494457bb34da5b93b02804dde28bac50a925281b32f

Aliases

arxiv: 1105.4676 · arxiv_version: 1105.4676v2 · doi: 10.48550/arxiv.1105.4676 · pith_short_12: Z74PURQIIYHH · pith_short_16: Z74PURQIIYHHIF6I · pith_short_8: Z74PURQI

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/Z74PURQIIYHHIF6IYSKEK65TJW \
  | 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: cff8fa4608460e7417c8c494457bb34da5b93b02804dde28bac50a925281b32f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2f5d0ace667c13aa082313c2405d39023531d322899b8d2e1f2413d23fd38cfd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-05-24T04:16:53Z",
    "title_canon_sha256": "fdcf8b7a5971553de031c466d07d6757be77fc0f0317619ee5db69df1e4b9121"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1105.4676",
    "kind": "arxiv",
    "version": 2
  }
}