Pith Number

pith:UBNWGKWU

pith:2009:UBNWGKWUACNBOVPQAAXRBAEEYU

not attested not anchored not stored refs pending

Calibrating the correlation between black hole mass and X-ray variability amplitude: X-ray only black hole mass estimates for active galactic nuclei and ultra-luminous X-ray sources

Ding-Xiong Wang, Ling Zhu, Shuang-Nan Zhang, Xin-Lin Zhou

arxiv:0912.2636 v2 · 2009-12-14 · astro-ph.HE · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UBNWGKWUACNBOVPQAAXRBAEEYU}

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

Probing the nature of Einstein nonlinear Maxwell Yukawa black hole through gravitational wave forms from periodic orbits and quasiperiodic oscillations

Receipt and verification

First computed	2026-05-18T02:33:56.625449Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a05b632ad4009a1755f0002f108084c5103db8124dcb651554118985a962afdd

Aliases

arxiv: 0912.2636 · arxiv_version: 0912.2636v2 · doi: 10.48550/arxiv.0912.2636 · pith_short_12: UBNWGKWUACNB · pith_short_16: UBNWGKWUACNBOVPQ · pith_short_8: UBNWGKWU

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/UBNWGKWUACNBOVPQAAXRBAEEYU \
  | 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: a05b632ad4009a1755f0002f108084c5103db8124dcb651554118985a962afdd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e318743f4619baf8e1f23e0dcc50b18c8f6569c6bf5d8b1c67cd17b5e844697f",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-12-14T12:58:43Z",
    "title_canon_sha256": "5e07f34f3a62b5fd1b0bd9ce0905ea3f3fbb7c101e5960c0a26ab9d275d9189e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.2636",
    "kind": "arxiv",
    "version": 2
  }
}