Pith Number

pith:IGQFKNCW

pith:2016:IGQFKNCWQMTN36I6RXQVE4YN3R

not attested not anchored not stored refs pending

From ultraluminous X-ray sources to ultraluminous supersoft sources: NGC 55 ULX, the missing link

A. C. Fabian, A. D. Sutton, C. Pinto, D. J. Walton, E. Kara, H. Earnshaw, M. J. Middleton, R. Soria, R. Urquhart, T. P. Roberts, W. Alston

arxiv:1612.05569 v2 · 2016-12-16 · astro-ph.HE · astro-ph.IM · physics.plasm-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IGQFKNCWQMTN36I6RXQVE4YN3R}

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	2026-05-18T00:45:14.660819Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

41a05534568326ddf91e8de152730ddc75cb15554d4b3635d1e343f13d8f968b

Aliases

arxiv: 1612.05569 · arxiv_version: 1612.05569v2 · doi: 10.48550/arxiv.1612.05569 · pith_short_12: IGQFKNCWQMTN · pith_short_16: IGQFKNCWQMTN36I6 · pith_short_8: IGQFKNCW

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/IGQFKNCWQMTN36I6RXQVE4YN3R \
  | 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: 41a05534568326ddf91e8de152730ddc75cb15554d4b3635d1e343f13d8f968b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eb7e41f0a366b1de7a3602b3f1142e6bc83fdd156e52702af9c185cc8644a972",
    "cross_cats_sorted": [
      "astro-ph.IM",
      "physics.plasm-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2016-12-16T17:49:13Z",
    "title_canon_sha256": "b360b294bb2e1eae587544256a30f5e7aa1ac62cd9c209b3abe3745f2123e477"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1612.05569",
    "kind": "arxiv",
    "version": 2
  }
}