Pith Number

pith:SQ4GVKY6

pith:2019:SQ4GVKY67B4NBAUT6F7HQGB27U

not attested not anchored not stored refs pending

Discovery of an Outbursting 12.8 Minute Ultracompact X-Ray Binary

A. Udalski, I. Soszynski, J. Skowron, P. Mroz, P. Pietrukowicz

arxiv:1908.08186 v1 · 2019-08-22 · astro-ph.SR · 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{SQ4GVKY67B4NBAUT6F7HQGB27U}

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	2026-07-04T23:59:10.373375Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

94386aab1ef878d08293f17e78183afd3e66b6252ca78e8f431ff6483b404b75

Aliases

arxiv: 1908.08186 · arxiv_version: 1908.08186v1 · doi: 10.48550/arxiv.1908.08186 · pith_short_12: SQ4GVKY67B4N · pith_short_16: SQ4GVKY67B4NBAUT · pith_short_8: SQ4GVKY6

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/SQ4GVKY67B4NBAUT6F7HQGB27U \
  | 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: 94386aab1ef878d08293f17e78183afd3e66b6252ca78e8f431ff6483b404b75

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "62e99e357f5d8e7368bfc8905425ec595473d95409240479370fac18fb629db0",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2019-08-22T03:37:22Z",
    "title_canon_sha256": "817a4d18597763c7e7a3d5d771d4843f11869cd89b3e6a6c4d45c2fda068825e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.08186",
    "kind": "arxiv",
    "version": 1
  }
}