Pith Number

pith:E6OSUNHL

pith:2025:E6OSUNHL6REL4UCQM52M6NMHSL

not attested not anchored not stored refs pending

Hybrid Approaches for Black Hole Spin Estimation: From Classical Spectroscopy to Physics-Informed Machine Learning

Stella Menziltsidou

arxiv:2508.06506 v2 · 2025-07-27 · astro-ph.HE · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{E6OSUNHL6REL4UCQM52M6NMHSL}

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	2026-07-05T11:52:23.973902Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

279d2a34ebf448be50506774cf358792e49041c5c4b8fc658e590d786d03d6a3

Aliases

arxiv: 2508.06506 · arxiv_version: 2508.06506v2 · doi: 10.48550/arxiv.2508.06506 · pith_short_12: E6OSUNHL6REL · pith_short_16: E6OSUNHL6REL4UCQ · pith_short_8: E6OSUNHL

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/E6OSUNHL6REL4UCQM52M6NMHSL \
  | 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: 279d2a34ebf448be50506774cf358792e49041c5c4b8fc658e590d786d03d6a3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0f0c7250a79739f6030804d9302a664d25daa45fa703067a0b86309283981344",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2025-07-27T09:04:21Z",
    "title_canon_sha256": "0b1e03c43e1075aba6803f219479f92544bb4b175845c37130019767e72bb611"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2508.06506",
    "kind": "arxiv",
    "version": 2
  }
}