Pith Number

pith:IB77BJFF

pith:2018:IB77BJFFWATLQHUVNZTWOMLDDP

not attested not anchored not stored refs pending

A 3.5-million Solar Masses Black Hole in the Centre of the Ultracompact Dwarf Galaxy Fornax UCD3

Aaron J. Romanowsky, Anil Seth, Anton V. Afanasiev, Arianna Picotti, Christopher Ahn, George Hau, Holger Baumgardt, Igor V. Chilingarian, Jay Strader, Jean Brodie, Jonelle L. Walsh, Karina T. Voggel, Lee Spitler, Mark den Brok, Matthias Frank, Michael Hilker, Nadine Neumayer, Richard McDermid, Steffen Mieske

arxiv:1804.02938 v1 · 2018-04-09 · 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{IB77BJFFWATLQHUVNZTWOMLDDP}

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	2026-05-18T00:17:03.437051Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

407ff0a4a5b026b81e956e676731631be51a84a9c5d1123c453f60a9001533ab

Aliases

arxiv: 1804.02938 · arxiv_version: 1804.02938v1 · doi: 10.48550/arxiv.1804.02938 · pith_short_12: IB77BJFFWATL · pith_short_16: IB77BJFFWATLQHUV · pith_short_8: IB77BJFF

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/IB77BJFFWATLQHUVNZTWOMLDDP \
  | 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: 407ff0a4a5b026b81e956e676731631be51a84a9c5d1123c453f60a9001533ab

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "efc80c4b9469332225114af5786cd4c32b7c01a58733a5a73f9a8ce2334d1cea",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-04-09T12:26:32Z",
    "title_canon_sha256": "dd806f7f526197869d49b185772567bd7e6f4ad73322d14a593177f5d274d244"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.02938",
    "kind": "arxiv",
    "version": 1
  }
}