Pith Number

pith:LKUQ4TPB

pith:2011:LKUQ4TPBD4FVZK636V77I4ANZK

not attested not anchored not stored refs pending

The X-ray spectral properties of the AGN population in the XMM-Newton bright serendipitous survey

(2) Max-Planck-Institut fur extraterrestrische Physik, (3) Instituto de Fisica de Cantabria (CSIC-UC), (4) Mullard Space Science Laboratory (UCL), (5) Astrophysikalisches Institut Potsdam, A. Caccianiga (1), A. Corral (1), A.D. Schwope (5) ((1) INAF-Osservatorio Astronomico di Brera, F.J. Carrera (3), Germany, Germany), H. Brunner (2), Italy, M.J. Page (4), P. Severgnini (1), R. Della Ceca (1), Spain, UK

arxiv:1104.2173 v1 · 2011-04-12 · 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{LKUQ4TPBD4FVZK636V77I4ANZK}

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	2026-05-18T02:02:34.869427Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5aa90e4de11f0b5cabdbf57ff4700dcab94afaf0e983b6c95d30d565ca2feeaf

Aliases

arxiv: 1104.2173 · arxiv_version: 1104.2173v1 · doi: 10.48550/arxiv.1104.2173 · pith_short_12: LKUQ4TPBD4FV · pith_short_16: LKUQ4TPBD4FVZK63 · pith_short_8: LKUQ4TPB

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/LKUQ4TPBD4FVZK636V77I4ANZK \
  | 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: 5aa90e4de11f0b5cabdbf57ff4700dcab94afaf0e983b6c95d30d565ca2feeaf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0c0d828334f4c5317a9ae9831a8e6d92fddda4fe9c79ee50ccba96ac2f7b3fb5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-04-12T11:25:26Z",
    "title_canon_sha256": "382e363e16249122123a92aa450314b82150b81a7df30e2dd5bf1b3c33d4d8bc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.2173",
    "kind": "arxiv",
    "version": 1
  }
}