Pith Number

pith:UP5S6PFI

pith:2013:UP5S6PFIGDJGSIT7OQCPXBLLL5

not attested not anchored not stored refs pending

Two Compton-Thick Active Nuclei in Arp 220?

Alessandro Paggi, Giuseppina Fabbiano, Guido Risaliti, Junfeng Wang, Martin Elvis

arxiv:1303.2630 v1 · 2013-03-11 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UP5S6PFIGDJGSIT7OQCPXBLLL5}

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	2026-05-18T03:31:18.462230Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3fb2f3ca830d269227f7404fb856b5f4c9e0686e9357b60281067d55caa59d3

Aliases

arxiv: 1303.2630 · arxiv_version: 1303.2630v1 · doi: 10.48550/arxiv.1303.2630 · pith_short_12: UP5S6PFIGDJG · pith_short_16: UP5S6PFIGDJGSIT7 · pith_short_8: UP5S6PFI

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/UP5S6PFIGDJGSIT7OQCPXBLLL5 \
  | 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: a3fb2f3ca830d269227f7404fb856b5f4c9e0686e9357b60281067d55caa59d3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "606aba1b354b4c756207e367d90f335fe351ad65d969a540b50434486ab033b0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2013-03-11T19:20:27Z",
    "title_canon_sha256": "58aa29123608c8f77af24c7da251d6c5364fc94f8452a9c2175d34a27cbae7ba"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.2630",
    "kind": "arxiv",
    "version": 1
  }
}