Pith Number

pith:ZU2NWLCL

pith:2020:ZU2NWLCLY7FUFCHAQBYXD4EG34

not attested not anchored not stored refs pending

The spin measurement of the black hole in 4U 1543-47 constrained with the X-ray reflected emission

James F. Steiner, Javier A. Garc\'ia, Lijun Gou, Yanting Dong

arxiv:2002.11922 v1 · 2020-02-27 · 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{ZU2NWLCLY7FUFCHAQBYXD4EG34}

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

Radio flares and X-ray hardening embedded in the long soft state of 4U 1543-475

Receipt and verification

First computed	2026-07-05T00:47:02.158907Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cd34db2c4bc7cb4288e0807171f086df2c62e119c81f126bd70a864f20850485

Aliases

arxiv: 2002.11922 · arxiv_version: 2002.11922v1 · doi: 10.48550/arxiv.2002.11922 · pith_short_12: ZU2NWLCLY7FU · pith_short_16: ZU2NWLCLY7FUFCHA · pith_short_8: ZU2NWLCL

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/ZU2NWLCLY7FUFCHAQBYXD4EG34 \
  | 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: cd34db2c4bc7cb4288e0807171f086df2c62e119c81f126bd70a864f20850485

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "773b3085b19073c87b83b68ac2d9140538c12b1726683fdd4729234852b04b8b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2020-02-27T05:23:10Z",
    "title_canon_sha256": "ae07cc77b37a374b0c57152099ae600ebd9a03a7549421d6edc7f0cef724378b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2002.11922",
    "kind": "arxiv",
    "version": 1
  }
}