Pith Number

pith:UQ3XKNQN

pith:2015:UQ3XKNQNRI5XPWVVEMO3ATQYN3

not attested not anchored not stored refs pending

A Revised Calibration of the Virial Mass Estimator for Black Holes in Active Galaxies Based on Single-epoch H$\beta$ Spectra

Luis C. Ho (KIAA-PKU), Minjin Kim (KASI)

arxiv:1507.04821 v1 · 2015-07-17 · 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{UQ3XKNQNRI5XPWVVEMO3ATQYN3}

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	2026-05-18T01:35:06.804752Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a43775360d8a3b77dab5231db04e186eddf05dad9ffc83169b3a70da81baf342

Aliases

arxiv: 1507.04821 · arxiv_version: 1507.04821v1 · doi: 10.48550/arxiv.1507.04821 · pith_short_12: UQ3XKNQNRI5X · pith_short_16: UQ3XKNQNRI5XPWVV · pith_short_8: UQ3XKNQN

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/UQ3XKNQNRI5XPWVVEMO3ATQYN3 \
  | 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: a43775360d8a3b77dab5231db04e186eddf05dad9ffc83169b3a70da81baf342

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6f75a4b8275032361fd145e1b99644f408a4465c5908db0d479a45fd313b5aa3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-07-17T02:47:03Z",
    "title_canon_sha256": "01b5c38cc9cdb53c76a6e6f8d250c389fd82b46d9d7742e9e6ac087d602499db"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.04821",
    "kind": "arxiv",
    "version": 1
  }
}