Pith Number

pith:R2X3MNPY

pith:2013:R2X3MNPYTD3HAXRFIPLWZXDU6E

not attested not anchored not stored refs pending

Spectral ageing in the lobes of FR-II radio galaxies: New methods of analysis for broadband radio data

Jeremy Harwood, Joanna Goodger, Judith Croston, Martin Hardcastle

arxiv:1308.4137 v1 · 2013-08-19 · astro-ph.CO · astro-ph.HE · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{R2X3MNPYTD3HAXRFIPLWZXDU6E}

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	2026-05-18T03:10:14.044209Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8eafb635f898f6705e2543d76cdc74f11102db696f0db281cb9c238c6fb023fb

Aliases

arxiv: 1308.4137 · arxiv_version: 1308.4137v1 · doi: 10.48550/arxiv.1308.4137 · pith_short_12: R2X3MNPYTD3H · pith_short_16: R2X3MNPYTD3HAXRF · pith_short_8: R2X3MNPY

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/R2X3MNPYTD3HAXRFIPLWZXDU6E \
  | 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: 8eafb635f898f6705e2543d76cdc74f11102db696f0db281cb9c238c6fb023fb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e1ac76db37e10a7640de8a65b454278c2825c109fc5540201f49cae37f9c7e1f",
    "cross_cats_sorted": [
      "astro-ph.HE",
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-08-19T20:00:02Z",
    "title_canon_sha256": "a8f4b0950db5f1870611f498bc63bd1c3a875b276b9ff5272d2879cee24de438"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.4137",
    "kind": "arxiv",
    "version": 1
  }
}