Pith Number

pith:4WRZLZ6R

pith:2003:4WRZLZ6R6HPZGMUXOPZJEITYCQ

not attested not anchored not stored refs pending

A 3x10^9 solar mass black hole in the quasar SDSS J1148+5251 at z=6.41

Chris J. Willott, Matt J. Jarvis, Ross J. McLure

arxiv:astro-ph/0303062 v1 · 2003-03-03 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4WRZLZ6R6HPZGMUXOPZJEITYCQ}

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.

Cited by

1 paper in Pith

Non-Equilibrium Relativistic Core Collapse of Self-Interacting Dark Matter Halos -- Limits On Seed Black Hole Mass

Receipt and verification

First computed	2026-07-04T16:36:35.108459Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e5a395e7d1f1df93329773f2922278143310d21eb84784dd3ea37e9d8cd9d35f

Aliases

arxiv: astro-ph/0303062 · arxiv_version: astro-ph/0303062v1 · doi: 10.48550/arxiv.astro-ph/0303062 · pith_short_12: 4WRZLZ6R6HPZ · pith_short_16: 4WRZLZ6R6HPZGMUX · pith_short_8: 4WRZLZ6R

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/4WRZLZ6R6HPZGMUXOPZJEITYCQ \
  | 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: e5a395e7d1f1df93329773f2922278143310d21eb84784dd3ea37e9d8cd9d35f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e376ca4a644f3200fd45c018d399533260c31573ede5c05a5419c788185ca3ac",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-03-03T23:16:42Z",
    "title_canon_sha256": "6349e7edc60bbd7d4955dbe8016cdedca5072c417493588445c010abb3821495"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0303062",
    "kind": "arxiv",
    "version": 1
  }
}