Pith Number

pith:BVIWYBT4

pith:2015:BVIWYBT4VHLHKSAIRENF2YLZMG

not attested not anchored not stored refs pending

Revealing a hard X-ray spectral component that reverberates within one light hour of the central supermassive black hole in Ark 564

E. Legg, I. M. George, J. N. Reeves, L. Miller, M. Giustini, S. B. Kraemer, T. J. Turner

arxiv:1502.01338 v2 · 2015-02-04 · 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{BVIWYBT4VHLHKSAIRENF2YLZMG}

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	2026-05-18T02:17:42.493572Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0d516c067ca9d6754808891a5d617961afbaa342ff4d712f798bb51a5e5b705e

Aliases

arxiv: 1502.01338 · arxiv_version: 1502.01338v2 · doi: 10.48550/arxiv.1502.01338 · pith_short_12: BVIWYBT4VHLH · pith_short_16: BVIWYBT4VHLHKSAI · pith_short_8: BVIWYBT4

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/BVIWYBT4VHLHKSAIRENF2YLZMG \
  | 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: 0d516c067ca9d6754808891a5d617961afbaa342ff4d712f798bb51a5e5b705e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ae93d39fa4c247a6fdac804c47608ea9bfc2ffdd970e245c3c9329962c3b8096",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2015-02-04T21:06:25Z",
    "title_canon_sha256": "a56180594847ffb92793301a2102ee479cee65d9cb226e1ba1ffa77f4fe1968d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.01338",
    "kind": "arxiv",
    "version": 2
  }
}