Pith Number

pith:5XR4ATJT

pith:2009:5XR4ATJTMA6GJDYQBJAGUUCPT4

not attested not anchored not stored refs pending

Heavily obscured AGN in the local Universe

A. Caccianiga, A. Moretti, C. Vignali, G. Cusumano, P. Severgnini, R. Della Ceca, V. La Parola

arxiv:0912.1708 v1 · 2009-12-09 · astro-ph.CO · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5XR4ATJTMA6GJDYQBJAGUUCPT4}

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	2026-05-18T02:10:25.363621Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ede3c04d33603c648f100a406a504f9f2728bb77dd39d560b6bba53d93ed1e8c

Aliases

arxiv: 0912.1708 · arxiv_version: 0912.1708v1 · doi: 10.48550/arxiv.0912.1708 · pith_short_12: 5XR4ATJTMA6G · pith_short_16: 5XR4ATJTMA6GJDYQ · pith_short_8: 5XR4ATJT

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/5XR4ATJTMA6GJDYQBJAGUUCPT4 \
  | 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: ede3c04d33603c648f100a406a504f9f2728bb77dd39d560b6bba53d93ed1e8c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f40dab9a1c5366500763f3442f926c03cfa5be642ad3564680a80c2e9ba72b62",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-12-09T10:23:26Z",
    "title_canon_sha256": "b66e3c0dc8c72b281333e49f7404428b274c06bc582348c206dc4583665688d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.1708",
    "kind": "arxiv",
    "version": 1
  }
}