Pith Number

pith:FYF2BSHI

pith:2011:FYF2BSHIFWRPFTWV3HWQVI2QLA

not attested not anchored not stored refs pending

Are SMBHs shrouded by "super-Oort" clouds of comets and asteroids?

Rashid Sunyaev, Sergei Nayakshin, Sergey Sazonov

arxiv:1109.1217 v2 · 2011-09-06 · astro-ph.CO · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FYF2BSHIFWRPFTWV3HWQVI2QLA}

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	2026-05-18T02:00:38.932517Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2e0ba0c8e82da2f2ced5d9ed0aa35058097eca2a30ed6fa3876f74efa12edf7a

Aliases

arxiv: 1109.1217 · arxiv_version: 1109.1217v2 · doi: 10.48550/arxiv.1109.1217 · pith_short_12: FYF2BSHIFWRP · pith_short_16: FYF2BSHIFWRPFTWV · pith_short_8: FYF2BSHI

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/FYF2BSHIFWRPFTWV3HWQVI2QLA \
  | 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: 2e0ba0c8e82da2f2ced5d9ed0aa35058097eca2a30ed6fa3876f74efa12edf7a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5075416053229ba7c5a59f9f364dc38b5505ffba05e7e181c9654843df14e9c2",
    "cross_cats_sorted": [
      "astro-ph.EP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-09-06T15:51:10Z",
    "title_canon_sha256": "55339472d601149485487deebb5aed506426df2b43b2db2b5e05f65d6d744271"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.1217",
    "kind": "arxiv",
    "version": 2
  }
}