Pith Number

pith:NQ7HT4HZ

pith:2018:NQ7HT4HZ7X3TMNXVJ5WHL5TR56

not attested not anchored not stored refs pending

The observed vs total population of ULXs

Grzegorz Wiktorowicz, Jean-Pierre Lasota, Krzysztof Belczynski, Matthew Middleton

arxiv:1811.08998 v3 · 2018-11-22 · 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{NQ7HT4HZ7X3TMNXVJ5WHL5TR56}

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	2026-05-17T23:47:12.303345Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6c3e79f0f9fdf73636f54f6c75f671ef990fbba1b2c734b8e9472568ccc7f0f9

Aliases

arxiv: 1811.08998 · arxiv_version: 1811.08998v3 · doi: 10.48550/arxiv.1811.08998 · pith_short_12: NQ7HT4HZ7X3T · pith_short_16: NQ7HT4HZ7X3TMNXV · pith_short_8: NQ7HT4HZ

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/NQ7HT4HZ7X3TMNXVJ5WHL5TR56 \
  | 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: 6c3e79f0f9fdf73636f54f6c75f671ef990fbba1b2c734b8e9472568ccc7f0f9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c412d077417828349b3344342bf41973d84be8a6bb7f1257192b542961ae7a94",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2018-11-22T02:49:19Z",
    "title_canon_sha256": "c9ac14c122257f1f6ef2bb05294ac3cf68c4fd491f7c0557b8e2bef792567e1a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.08998",
    "kind": "arxiv",
    "version": 3
  }
}