Pith Number

pith:XIKA5CW5

pith:2012:XIKA5CW53R2UOXCOPEJ7AT43FK

not attested not anchored not stored refs pending

The high-redshift (z>3) AGN population in the 4 Ms Chandra Deep Field South

(10) Pontificia Universidad Cat\'olica de Chile, 11), (11) Space Science Institute, (12) Department of Astronomy, 2), (2) INAF-OABO, (3) ICREA, (4) Department of Astronomy, 5), 5) ((1) Dipartimento di Astronomia, (5) Institute for Gravitation, (6) Department of Physics, (7) Max Planck Institut f\"ur Extraterrestische Physik, (8) The Johns Hopkins University, 9), (9) NASA Goddard Space Flight Centre, A. Comastri (2), Astrophysics, Baltimore, B. Lehmer (8, B. Luo (4, Boulder, Chile, China), C. Vignali (1, D. M. Alexander (6), D. P. Schneider (4, F. E. Bauer (10, F. Vito (1, Garching, Germany, Greenbelt, ICC, Italy, K. Iwasawa (3), M. Brusa (7), R. Gilli (2), Santiago, Spain, Technology of China, the Cosmos, The Pennsylvania State University, UK, Universit\'a di Bologna, Universitat de Barcelona, University of Durham, University of Science, USA, W. N. Brandt (4, Y. Q. Xue (12)

arxiv:1209.4193 v2 · 2012-09-19 · astro-ph.CO · 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{XIKA5CW53R2UOXCOPEJ7AT43FK}

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	2026-05-18T03:42:13.001524Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ba140e8adddc75475c4e7913f04f9b2ab50e832d41effbb2cbba88aca4e760f7

Aliases

arxiv: 1209.4193 · arxiv_version: 1209.4193v2 · doi: 10.48550/arxiv.1209.4193 · pith_short_12: XIKA5CW53R2U · pith_short_16: XIKA5CW53R2UOXCO · pith_short_8: XIKA5CW5

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/XIKA5CW53R2UOXCOPEJ7AT43FK \
  | 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: ba140e8adddc75475c4e7913f04f9b2ab50e832d41effbb2cbba88aca4e760f7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c2df5473da6e0cc5a597507a66bc55ebf8f0d93d3d9648b4e518bc66bba7efec",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-09-19T09:31:49Z",
    "title_canon_sha256": "0070d421e68ed5ac8aa7a77a8d22c81e1572b9f28437ef864f4e88e5c98c3245"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.4193",
    "kind": "arxiv",
    "version": 2
  }
}