Pith Number

pith:UDQFO7YJ

pith:2018:UDQFO7YJPTIOJ6NFNPQKIGATAS

not attested not anchored not stored refs pending

Wandering Supermassive Black Holes in Milky Way Mass Halos

Andrew Pontzen, Fabio Governato, Marta Volonteri, Michael Tremmel, Thomas R. Quinn

arxiv:1802.06783 v2 · 2018-02-19 · astro-ph.GA

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

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	2026-05-18T00:17:04.754241Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a0e0577f097cd0e4f9a56be0a4181304a1a3aebb7dcddce60ba196bebf6e5d73

Aliases

arxiv: 1802.06783 · arxiv_version: 1802.06783v2 · doi: 10.48550/arxiv.1802.06783 · pith_short_12: UDQFO7YJPTIO · pith_short_16: UDQFO7YJPTIOJ6NF · pith_short_8: UDQFO7YJ

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/UDQFO7YJPTIOJ6NFNPQKIGATAS \
  | 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: a0e0577f097cd0e4f9a56be0a4181304a1a3aebb7dcddce60ba196bebf6e5d73

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8d3a65b9f2432846b17a600e537a24a8e1cbfa187219b51d0b12cf64719569d9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-02-19T19:00:00Z",
    "title_canon_sha256": "2de4b3ef6ce1120d38f0187686cc13ca4f75a3d67fadb0533487a55df76f90c2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.06783",
    "kind": "arxiv",
    "version": 2
  }
}