Pith Number

pith:2R2KLO55

pith:2009:2R2KLO55EASMAE7UGVB5OCISCX

not attested not anchored not stored refs pending

A census of X-ray nuclear activity in nearby galaxies

Douglas A. Swartz (NASA MSFC), JiFeng Liu (Harvard-Smithsonian CfA), Roberto Soria (University College London), Shuang Nan Zhang (Tsinghua University), Wei Ming Zhang (Tsinghua University)

arxiv:0904.1091 v2 · 2009-04-07 · 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{2R2KLO55EASMAE7UGVB5OCISCX}

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.

Cited by

1 paper in Pith

Nuclear Activity and Host Galaxy Properties of Low-Luminosity AGN Identified from VLA Observations

Receipt and verification

First computed	2026-05-18T04:34:19.729670Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d474a5bbbd2024c013f43543d7091215cc3400cbd3798b59db9ce8d88956a301

Aliases

arxiv: 0904.1091 · arxiv_version: 0904.1091v2 · doi: 10.48550/arxiv.0904.1091 · pith_short_12: 2R2KLO55EASM · pith_short_16: 2R2KLO55EASMAE7U · pith_short_8: 2R2KLO55

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/2R2KLO55EASMAE7UGVB5OCISCX \
  | 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: d474a5bbbd2024c013f43543d7091215cc3400cbd3798b59db9ce8d88956a301

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4b9db235c495275d8c7d953a0c6165134668c8b3053f248410fee6997e7b16ee",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-04-07T09:37:02Z",
    "title_canon_sha256": "fbdc4b67846f409c3b24de9e8eb5f5a9eae2875d4ea9415a2b920e4872cd923d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.1091",
    "kind": "arxiv",
    "version": 2
  }
}