Pith Number

pith:Y2LS4RHU

pith:2000:Y2LS4RHUZ3DDMHU7IIQXSKYH5X

not attested not anchored not stored refs pending

HST infrared imaging polarimetry of Centaurus A: implications for the unified scheme and the existence of a mis-directed BL Lac nucleus

A. Capetti, A. Marconi, C. Packham, D.J. Axon, E.J. Schreier, F.D. Macchetto, J.H. Hough, S. Clark, S. Young

arxiv:astro-ph/0007435 v1 · 2000-07-28 · 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{Y2LS4RHUZ3DDMHU7IIQXSKYH5X}

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	2026-07-04T16:16:57.989556Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c6972e44f4cec6361e9f4221792b07edfd3b1795c1835bd424685581d00ce9a0

Aliases

arxiv: astro-ph/0007435 · arxiv_version: astro-ph/0007435v1 · doi: 10.48550/arxiv.astro-ph/0007435 · pith_short_12: Y2LS4RHUZ3DD · pith_short_16: Y2LS4RHUZ3DDMHU7 · pith_short_8: Y2LS4RHU

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/Y2LS4RHUZ3DDMHU7IIQXSKYH5X \
  | 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: c6972e44f4cec6361e9f4221792b07edfd3b1795c1835bd424685581d00ce9a0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d5aa1364e60733334397a79a71a618cca081a8d158985906dae2726763764d8a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-07-28T11:37:41Z",
    "title_canon_sha256": "d20d55435ae688caa9f052aff1ea106ad081360c270ccbde29c5a7cf9d2a2c55"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0007435",
    "kind": "arxiv",
    "version": 1
  }
}