Pith Number

pith:NDFIRSUC

pith:2021:NDFIRSUCCIEILX2KIGTWQL5DTG

not attested not anchored not stored refs pending

The spins of the Galactic black holes in MAXI J1535-571 and 4U 1630-472 from Insight-HXMT

Cosimo Bambi, Honghui Liu, Long Ji, Qichun Liu

arxiv:2111.00719 v3 · 2021-11-01 · astro-ph.HE · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NDFIRSUCCIEILX2KIGTWQL5DTG}

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	2026-07-05T04:08:26.945968Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

68ca88ca82120885df4a41a7682fa3998c5671426e1d4ea11f65ea10c2688bc2

Aliases

arxiv: 2111.00719 · arxiv_version: 2111.00719v3 · doi: 10.48550/arxiv.2111.00719 · pith_short_12: NDFIRSUCCIEI · pith_short_16: NDFIRSUCCIEILX2K · pith_short_8: NDFIRSUC

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/NDFIRSUCCIEILX2KIGTWQL5DTG \
  | 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: 68ca88ca82120885df4a41a7682fa3998c5671426e1d4ea11f65ea10c2688bc2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "308b445067d304315bfe3f0c95ab4a5b0aa255f668f63fb5b23649a1a8506c0e",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2021-11-01T06:15:42Z",
    "title_canon_sha256": "ca3c2df0094bfc534bbada47ca5947536b45168bba2ea933a4106f78e3f0e930"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2111.00719",
    "kind": "arxiv",
    "version": 3
  }
}