Pith Number

pith:4U4IQNC4

pith:2013:4U4IQNC4PH7BFBPBD2K743B7MG

not attested not anchored not stored refs pending

The XMM-Newton deep survey in the Chandra Deep Field South. III. Point source catalogue and number counts in the hard X-rays

A. Comastri, C. Vignali, F. J. Carrera, H. Brunner, I. Georgantopoulos, K. Iwasawa, M. Brusa, N. Cappelluti, P. Ranalli, R. Gilli, S. Puccetti, V. Mainieri, W. N. Brandt

arxiv:1304.5717 v1 · 2013-04-21 · astro-ph.HE · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4U4IQNC4PH7BFBPBD2K743B7MG}

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	2026-05-18T01:50:24.033964Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e53888345c79fe1285e11e95fe6c3f61a172c6bc63fce32b884f62ef84f9ffd2

Aliases

arxiv: 1304.5717 · arxiv_version: 1304.5717v1 · doi: 10.48550/arxiv.1304.5717 · pith_short_12: 4U4IQNC4PH7B · pith_short_16: 4U4IQNC4PH7BFBPB · pith_short_8: 4U4IQNC4

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/4U4IQNC4PH7BFBPBD2K743B7MG \
  | 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: e53888345c79fe1285e11e95fe6c3f61a172c6bc63fce32b884f62ef84f9ffd2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b04087d4aa992935f4e8d4189e461773bb9e4813c29c2bf587dd5e5142ed291d",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2013-04-21T10:25:05Z",
    "title_canon_sha256": "5773ee88b829bddf5d4f262a3fa17956feb3be0362fac297a6987b7e69a8e24d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.5717",
    "kind": "arxiv",
    "version": 1
  }
}