Pith Number

pith:KS6FISOW

pith:2009:KS6FISOWYOGQ2YFTY63KPL4KPV

not attested not anchored not stored refs pending

A Quintet of Black Hole Mass Determinations

(10) LBT Observatory, (11) Institut d'Astronomie et d'Astrophysique, (2) Department of Astronomy, (3) National Optical Astronomy Observatory, (4) Department of Physics, (5) Department of Physics, (6) Universitaets-Sternwarte der Ludwig-Maximilians-Universit\"at, (7) Observatories of the Carnegie Institution of Washington, (8) University of California Observatories/Lick Observatory, (9) Department of Astronomy, Alan Dressler (7), Alexei V. Filippenko (9), Astronomy, Astrophysics, Berkeley, Board of Studies in Astronomy, Christos Siopis (11) ((1) Dept. of Astronomy, Douglas O. Richstone (1), ETH Zurich, Institute of Astronomy, Jason Pinkney (4), John Kormendy (2), Karl Gebhardt (2), Kayhan Gultekin (1), Luis C. Ho (7), M. C. Aller (5), Ohio Northern University, Ralf Bender (6), Richard Green (10), Santa Cruz, S. M. Faber (8), Tod R. Lauer (3), Universit\'e Libre de Bruxelles), University of Arizona, University of California, University of Michigan, University of Texas

arxiv:0901.4162 v2 · 2009-01-27 · astro-ph.GA · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KS6FISOWYOGQ2YFTY63KPL4KPV}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T04:29:17.142959Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

54bc5449d6c38d0d60b3c7b6a7af8a7d5435560b75a4b53b04a7f135e7e6a595

Aliases

arxiv: 0901.4162 · arxiv_version: 0901.4162v2 · doi: 10.48550/arxiv.0901.4162 · pith_short_12: KS6FISOWYOGQ · pith_short_16: KS6FISOWYOGQ2YFT · pith_short_8: KS6FISOW

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/KS6FISOWYOGQ2YFTY63KPL4KPV \
  | 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: 54bc5449d6c38d0d60b3c7b6a7af8a7d5435560b75a4b53b04a7f135e7e6a595

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "35a9002a6b2288fd564a75a106f681643d25855bf0f30164c1f47c36d66f86f1",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-01-27T13:41:49Z",
    "title_canon_sha256": "f0a961b0fefb9247a770a5949e31aa107b1d6d22d41bb20cced1b2c9c6d46b9b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.4162",
    "kind": "arxiv",
    "version": 2
  }
}