Pith Number

pith:AFW6OGGB

pith:2021:AFW6OGGBLBR3FBFBWRAK4GVZFR

not attested not anchored not stored refs pending

Quasi-periodic dipping in the ultraluminous X-ray source, NGC 247 ULX-1

A. C. Fabian, A. D'Ai, A. Robba, C. Pinto, D. Barret, D. Walton, E. Ambrosi, E. Kara, F. Fuerst, F. Pintore, H. Earnshaw, M. Del Santo, M. J. Middleton, M. L. Parker, P. Kosec, R. Sathyaprakash, T. P. Roberts, W. N. Alston

arxiv:2104.11163 v2 · 2021-04-22 · 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{AFW6OGGBLBR3FBFBWRAK4GVZFR}

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	2026-07-05T02:53:01.969945Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

016de718c15863b284a1b440ae1ab92c4450b6d944e6cb435f6cfaa77521cb59

Aliases

arxiv: 2104.11163 · arxiv_version: 2104.11163v2 · doi: 10.48550/arxiv.2104.11163 · pith_short_12: AFW6OGGBLBR3 · pith_short_16: AFW6OGGBLBR3FBFB · pith_short_8: AFW6OGGB

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/AFW6OGGBLBR3FBFBWRAK4GVZFR \
  | 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: 016de718c15863b284a1b440ae1ab92c4450b6d944e6cb435f6cfaa77521cb59

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a196ad984121276b45203145e61082aadcf6731dd995a86608c872acfcad9d04",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2021-04-22T16:32:52Z",
    "title_canon_sha256": "2f5fe82a60deb760362493aa835124942e4f7a56ae337eeb74cb88d11ad571a3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.11163",
    "kind": "arxiv",
    "version": 2
  }
}