Pith Number

pith:IKD7PEVT

pith:2005:IKD7PEVTJQTUV4HSMLRVFHVIXG

not attested not anchored not stored refs pending

HST STIS spectroscopy of the triple nucleus of M31: two nested disks in Keplerian rotation around a Supermassive Black Hole

Anthony C. Danks, Bruce Woodgate, Charles H. Nelson, C. L. Joseph, Donna Weistrop, Douglas Richstone, Gary Bower, J. B. Hutchings, Jens Thomas, John Kormendy, M. E. Kaiser, Ralf Bender, Richard Green, Theodore Gull, Tod R. Lauer

arxiv:astro-ph/0509839 v1 · 2005-09-28 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IKD7PEVTJQTUV4HSMLRVFHVIXG}

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

2 papers in Pith

A Jet from a Nearly Dormant Black Hole

Co-evolution of Supermassive Black Holes and their Host L* galaxies: implications for Milky Way and M31

Receipt and verification

First computed	2026-07-04T16:52:56.133074Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4287f792b34c274af0f262e3529ea8b983baada269b2c0477a0181a70294d0ea

Aliases

arxiv: astro-ph/0509839 · arxiv_version: astro-ph/0509839v1 · doi: 10.48550/arxiv.astro-ph/0509839 · pith_short_12: IKD7PEVTJQTU · pith_short_16: IKD7PEVTJQTUV4HS · pith_short_8: IKD7PEVT

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/IKD7PEVTJQTUV4HSMLRVFHVIXG \
  | 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: 4287f792b34c274af0f262e3529ea8b983baada269b2c0477a0181a70294d0ea

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "89353645a7dea8782e8e0c7996c5f5643c2accbd79ebfc413f2d86c726fcd150",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-09-28T11:21:11Z",
    "title_canon_sha256": "349a51ed4c7267549e14c71a463cc8faf86b42f67e6597bfd897033e60580826"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0509839",
    "kind": "arxiv",
    "version": 1
  }
}