Pith Number

pith:HRX4Z3XO

pith:2014:HRX4Z3XONHNMSFKB2FW4PCOVNT

not attested not anchored not stored refs pending

Probing the Active Massive Black Hole Candidate in the Center of NGC 404 with VLBI

D. Cseh, P. Kaaret, P. Kharb, R. Overzier, S. Frey, Z. Paragi

arxiv:1406.4752 v1 · 2014-06-18 · astro-ph.GA · astro-ph.HE

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	2026-05-18T01:42:53.582356Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3c6fcceeee69dac91541d16dc789d56cea256b1336567757b53f1cbf32bddf34

Aliases

arxiv: 1406.4752 · arxiv_version: 1406.4752v1 · doi: 10.48550/arxiv.1406.4752 · pith_short_12: HRX4Z3XONHNM · pith_short_16: HRX4Z3XONHNMSFKB · pith_short_8: HRX4Z3XO

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/HRX4Z3XONHNMSFKB2FW4PCOVNT \
  | 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: 3c6fcceeee69dac91541d16dc789d56cea256b1336567757b53f1cbf32bddf34

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a0886940d113493ffeac03f6dfe5c324c427a97986e7dcc9c15f54195ba5188d",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2014-06-18T15:02:34Z",
    "title_canon_sha256": "2f2fba5e7eed78e6d81180a71fead6a14351f552137c149236b35bfe178e03d7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1406.4752",
    "kind": "arxiv",
    "version": 1
  }
}