Pith Number

pith:EWD2EMP2

pith:2025:EWD2EMP2QDUIYA6XX2N6ZY2GSI

not attested not anchored not stored refs pending

Estimating the spins of supermassive black holes in distant ultraluminous quasars

M.Yu. Piotrovich, S.D. Buliga, T.M. Natsvlishvili

arxiv:2505.08310 v1 · 2025-05-13 · 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{EWD2EMP2QDUIYA6XX2N6ZY2GSI}

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

Estimation of black hole spins in low-mass AGNs and comparison with other types of AGNs

Receipt and verification

First computed	2026-07-05T11:38:07.147360Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2587a231fa80e88c03d7be9bece346923639fd8cd25bea423ab1ee86cfbbbd97

Aliases

arxiv: 2505.08310 · arxiv_version: 2505.08310v1 · doi: 10.48550/arxiv.2505.08310 · pith_short_12: EWD2EMP2QDUI · pith_short_16: EWD2EMP2QDUIYA6X · pith_short_8: EWD2EMP2

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/EWD2EMP2QDUIYA6XX2N6ZY2GSI \
  | 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: 2587a231fa80e88c03d7be9bece346923639fd8cd25bea423ab1ee86cfbbbd97

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bf91720a01be5b8e8963fe563549bb80ff2af66a74acd532a7fd3104d012726d",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2025-05-13T07:37:06Z",
    "title_canon_sha256": "93691fe11c7936b3b6b99a9ee3609c2de92dd55e7b5b418e3073dde294a921d9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2505.08310",
    "kind": "arxiv",
    "version": 1
  }
}