Pith Number

pith:BWC4QWK5

pith:2008:BWC4QWK5KYNMEMH5HVLRXTRZDV

not attested not anchored not stored refs pending

HST observations of the quasar PKS 0637-752: equipartition electron-proton jet from the most complete spectral coverage to date

Charles A. Padgett, Eric S. Perlman, George Chartas, Kushal T. Mehta, Markos Georganopoulos

arxiv:0809.1608 v1 · 2008-09-09 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BWC4QWK5KYNMEMH5HVLRXTRZDV}

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	2026-05-18T04:29:32.823795Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0d85c8595d561ac230fd3d571bce391d6ccf791486197d6fc64fa11092e5b351

Aliases

arxiv: 0809.1608 · arxiv_version: 0809.1608v1 · doi: 10.48550/arxiv.0809.1608 · pith_short_12: BWC4QWK5KYNM · pith_short_16: BWC4QWK5KYNMEMH5 · pith_short_8: BWC4QWK5

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/BWC4QWK5KYNMEMH5HVLRXTRZDV \
  | 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: 0d85c8595d561ac230fd3d571bce391d6ccf791486197d6fc64fa11092e5b351

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bcdfd1d497677e5a67067fe6b37fbca3e62881ef97936d9a74911b2caeee5162",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-09-09T17:03:56Z",
    "title_canon_sha256": "b1bf06be1b39334f885960698a4917000fff909a3661963bb701e77505738b40"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.1608",
    "kind": "arxiv",
    "version": 1
  }
}