Pith Number

pith:KFGWNDTF

pith:2016:KFGWNDTFZW5HR4HKGAMVDMLN3E

not attested not anchored not stored refs pending

The ultraluminous X-ray source NGC 5643 ULX1: a large stellar mass black hole accreting at super-Eddington rates?

A. D. Sutton, F. Pintore, J. C. Gladstone, L. Zampieri, M. J. Middleton, T. P. Roberts

arxiv:1603.05542 v1 · 2016-03-17 · astro-ph.HE · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KFGWNDTFZW5HR4HKGAMVDMLN3E}

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	2026-05-18T01:17:40.853371Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

514d668e65cdba78f0ea301951b16dd92d51be937369df5f89f74e48fefb5088

Aliases

arxiv: 1603.05542 · arxiv_version: 1603.05542v1 · doi: 10.48550/arxiv.1603.05542 · pith_short_12: KFGWNDTFZW5H · pith_short_16: KFGWNDTFZW5HR4HK · pith_short_8: KFGWNDTF

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/KFGWNDTFZW5HR4HKGAMVDMLN3E \
  | 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: 514d668e65cdba78f0ea301951b16dd92d51be937369df5f89f74e48fefb5088

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "01a58c5df30e279623d7a80e8d8d80af08ca28b9504d27595b0eec70724e5ea7",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2016-03-17T15:34:45Z",
    "title_canon_sha256": "715293f0815fdefb3c50dbb24e2bfc8cc8c063fb3d60d626cd1925a6bc74ccf6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1603.05542",
    "kind": "arxiv",
    "version": 1
  }
}