Pith Number

pith:YQO3D6J7

pith:2001:YQO3D6J73Y42MLSQKSQ5734DGX

not attested not anchored not stored refs pending

Limits on the cosmological abundance of supermassive compact objects from a search for multiple imaging in compact radio sources

2), (2) Onsala Space Observatory, 3), (3) Universidade da Madeira., (4) California Institute of Technology, 5), (5) National Radio Astronomy Observatory, 6) ((1) University of Manchester, (6) Netherlands Foundation for Radioastronomy), A.C.S. Readhead (4), A.G. Polatidis (1, D.R. Henstock (1), G.B. Taylor (4, I.W.A. Browne (1), Jodrell Bank Observatory, P. Augusto (1, P.N. Wilkinson (1), R.C. Vermeulen (4, T.J. Pearson (4), W. Xu (4)

arxiv:astro-ph/0101328 v1 · 2001-01-18 · 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{YQO3D6J73Y42MLSQKSQ5734DGX}

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

2 papers in Pith

Constraints on Primordial Black Holes

Dark ages bounds on non-accreting massive compact halo objects

Receipt and verification

First computed	2026-07-04T15:32:00.453265Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c41db1f93fde39a62e5054a1dfef8335c279fcde99734c96b4911d242daad97a

Aliases

arxiv: astro-ph/0101328 · arxiv_version: astro-ph/0101328v1 · doi: 10.48550/arxiv.astro-ph/0101328 · pith_short_12: YQO3D6J73Y42 · pith_short_16: YQO3D6J73Y42MLSQ · pith_short_8: YQO3D6J7

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/YQO3D6J73Y42MLSQKSQ5734DGX \
  | 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: c41db1f93fde39a62e5054a1dfef8335c279fcde99734c96b4911d242daad97a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7d0250df8be6f3815fb084eef1a770174ade77a8c7637c9cc3b5cd4ab2cc6cab",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-01-18T13:57:08Z",
    "title_canon_sha256": "9ce57ff85ed54660f6c8a94e2d2c5dbb8d9513999c5796de28b23e31c96f269f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0101328",
    "kind": "arxiv",
    "version": 1
  }
}