Pith Number

pith:36JOJZ3U

pith:2021:36JOJZ3U7FNNTIO7IE27TALFE6

not attested not anchored not stored refs pending

The chameleon on the branches: spectral state transition and dips in NGC 247 ULX-1

A.C. Fabian, A. D'A\`i, A. Robba, C. Pinto, D. Barret, D. J. Walton, E. Ambrosi, E. Kara, F. F\"urst, F. Pintore, G. Rodriguez-Castillo, M. Del Santo, M. Middleton, P. Kosec, R. Soria, T. Roberts, W. Alston

arxiv:2108.09221 v1 · 2021-08-20 · 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{36JOJZ3U7FNNTIO7IE27TALFE6}

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	2026-07-05T03:12:15.527776Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

df92e4e774f95ad9a1df4135f9816527b768baa6f50ed768fd3731f27ec9a918

Aliases

arxiv: 2108.09221 · arxiv_version: 2108.09221v1 · doi: 10.48550/arxiv.2108.09221 · pith_short_12: 36JOJZ3U7FNN · pith_short_16: 36JOJZ3U7FNNTIO7 · pith_short_8: 36JOJZ3U

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/36JOJZ3U7FNNTIO7IE27TALFE6 \
  | 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: df92e4e774f95ad9a1df4135f9816527b768baa6f50ed768fd3731f27ec9a918

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4fb5b9776a9cbfc2f53c86a29657d787d3caf6fc5ab7015fe180132fae505f1c",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2021-08-20T15:28:04Z",
    "title_canon_sha256": "ecfebf9fcaccb68d5ee493bce1131bd8f71c1d953660c1c293b18d18ae4c800c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2108.09221",
    "kind": "arxiv",
    "version": 1
  }
}