Pith Number

pith:QLQLRVZW

pith:2018:QLQLRVZWLRWEQSSSDD4QXMYBTV

not attested not anchored not stored refs pending

A Likely Super Massive Black Hole Revealed by its Einstein Radius in Hubble Frontier Fields Images

Holland Ford, Jeremy Lim, Jose M. Diego, Mandy C. Chen, Narciso Ben\'itez, Tom Broadhurst, Youichi Ohyama

arxiv:1805.05051 v3 · 2018-05-14 · 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{QLQLRVZWLRWEQSSSDD4QXMYBTV}

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	2026-05-18T00:07:49.488181Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

82e0b8d7365c6c484a5218f90bb3019d7c3d1001e2a7747d9f6c4565debfa61b

Aliases

arxiv: 1805.05051 · arxiv_version: 1805.05051v3 · doi: 10.48550/arxiv.1805.05051 · pith_short_12: QLQLRVZWLRWE · pith_short_16: QLQLRVZWLRWEQSSS · pith_short_8: QLQLRVZW

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/QLQLRVZWLRWEQSSSDD4QXMYBTV \
  | 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: 82e0b8d7365c6c484a5218f90bb3019d7c3d1001e2a7747d9f6c4565debfa61b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d537972ff827ea11ae591fba62b46ef223a059a6e4063c8e11edf05de81e59d0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-05-14T08:05:48Z",
    "title_canon_sha256": "5d84d6b36c37ea02fa951a631cd762f153cbf8df4c6891d63aeab52239252a77"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.05051",
    "kind": "arxiv",
    "version": 3
  }
}