Pith Number

pith:FGM57NEH

pith:2019:FGM57NEHPKQDMZTUFQ6WZMOQAA

not attested not anchored not stored refs pending

Testing the Kerr hypothesis using X-ray reflection spectroscopy with NuSTAR data of Cygnus X-1 in the soft state

Askar B. Abdikamalov, Cosimo Bambi, Dimitry Ayzenberg, Honghui Liu, Javier A. Garcia, Sourabh Nampalliwar, Thomas Dauser

arxiv:1904.08027 v2 · 2019-04-17 · gr-qc · 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{FGM57NEHPKQDMZTUFQ6WZMOQAA}

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	2026-05-17T23:43:34.564554Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2999dfb4877aa03666742c3d6cb1d0002accc17dbb4977053548d1aea95a3a2d

Aliases

arxiv: 1904.08027 · arxiv_version: 1904.08027v2 · doi: 10.48550/arxiv.1904.08027 · pith_short_12: FGM57NEHPKQD · pith_short_16: FGM57NEHPKQDMZTU · pith_short_8: FGM57NEH

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/FGM57NEHPKQDMZTUFQ6WZMOQAA \
  | 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: 2999dfb4877aa03666742c3d6cb1d0002accc17dbb4977053548d1aea95a3a2d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a450774df9472dc2bb0d5d37d9f0e53c4ed5be2bdcf17c45d647734d24ba6279",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2019-04-17T00:19:21Z",
    "title_canon_sha256": "a80f9ae4f1e445ac11eb7ea42ce2ccc4d573d3a03190ea4ad1e7f131d474a91d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.08027",
    "kind": "arxiv",
    "version": 2
  }
}