Pith Number

pith:4W4WDK6N

pith:2018:4W4WDK6NWLDNJW5V5VAY7PJSFO

not attested not anchored not stored refs pending

On the search of the elusive Intermediate Mass Black-Holes

A. Castellon, A. J. Castro-Tirado, M. Bursa, M. D. Caballero-Garcia, M. Dovciak, S. Fabrika, V. Karas

arxiv:1802.07149 v2 · 2018-02-20 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4W4WDK6NWLDNJW5V5VAY7PJSFO}

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	2026-05-18T00:21:45.553190Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e5b961abcdb2c6d4dbb5ed418fbd322b9e31ee7bf2461497b5bc0aa5e49807ee

Aliases

arxiv: 1802.07149 · arxiv_version: 1802.07149v2 · doi: 10.48550/arxiv.1802.07149 · pith_short_12: 4W4WDK6NWLDN · pith_short_16: 4W4WDK6NWLDNJW5V · pith_short_8: 4W4WDK6N

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/4W4WDK6NWLDNJW5V5VAY7PJSFO \
  | 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: e5b961abcdb2c6d4dbb5ed418fbd322b9e31ee7bf2461497b5bc0aa5e49807ee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f0cab28c842a80b77a97da3599015e4100d8c824608d5cb861a56867d492e774",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2018-02-20T15:24:19Z",
    "title_canon_sha256": "11d8e0c4d3320a29a62abff772b8963e8f91572540d67f59bb8e5261484a854d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.07149",
    "kind": "arxiv",
    "version": 2
  }
}