Pith Number

pith:MWSHXK4Y

pith:2013:MWSHXK4YGAHIX6IRY2OD4HJ5AA

not attested not anchored not stored refs pending

Measuring Black Hole Spin using X-ray Reflection Spectroscopy

Christopher S. Reynolds (Maryland)

arxiv:1302.3260 v2 · 2013-02-13 · 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{MWSHXK4YGAHIX6IRY2OD4HJ5AA}

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	2026-05-18T01:51:41.538941Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

65a47bab98300e8bf911c69c3e1d3d001c27fe2e797ef91d8c952413d73f3084

Aliases

arxiv: 1302.3260 · arxiv_version: 1302.3260v2 · doi: 10.48550/arxiv.1302.3260 · pith_short_12: MWSHXK4YGAHI · pith_short_16: MWSHXK4YGAHIX6IR · pith_short_8: MWSHXK4Y

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/MWSHXK4YGAHIX6IRY2OD4HJ5AA \
  | 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: 65a47bab98300e8bf911c69c3e1d3d001c27fe2e797ef91d8c952413d73f3084

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "394c368b79fe60beddb3008c08402d29f474a79d09366a98e2ad692d34724d1e",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2013-02-13T22:18:36Z",
    "title_canon_sha256": "7bd757342c493191e51f36e6f8100735b6addf9a5133d3aef70181a266768e3c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.3260",
    "kind": "arxiv",
    "version": 2
  }
}