Pith Number

pith:3UOKWPFZ

pith:2019:3UOKWPFZMT3VBOUJI5JIWOWYDH

not attested not anchored not stored refs pending

The Unusual Broadband X-ray Spectral Variability of NGC 1313 X-1 seen with XMM$-$Newton, Chandra and NuSTAR

A. C. Fabian, C. Pinto, C. R. Canizares, D. Barret, D. J. Walton, D. Stern, E. Kara, F. A. Harrison, F. Furst, H. P. Earnshaw, L. Tao, M. Bachetti, M. Brightman, M. Heida, M. J. Middleton, M. Nowak, N. Webb, P. Kosec, R. Sathyaprakash, R. Soria, T. P. Roberts, W. N. Alston

arxiv:1911.09622 v2 · 2019-11-21 · 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{3UOKWPFZMT3VBOUJI5JIWOWYDH}

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	2026-07-05T01:00:36.360350Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dd1cab3cb964f750ba8947528b3ad819f4ac76ec6638667d7a2f2a70bc1153b0

Aliases

arxiv: 1911.09622 · arxiv_version: 1911.09622v2 · doi: 10.48550/arxiv.1911.09622 · pith_short_12: 3UOKWPFZMT3V · pith_short_16: 3UOKWPFZMT3VBOUJ · pith_short_8: 3UOKWPFZ

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/3UOKWPFZMT3VBOUJI5JIWOWYDH \
  | 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: dd1cab3cb964f750ba8947528b3ad819f4ac76ec6638667d7a2f2a70bc1153b0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "42b2d690eacdaace2b0ef136183d890baf641549b40e46085e8f1e4407aabffd",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2019-11-21T17:30:49Z",
    "title_canon_sha256": "efcf54296ffb60dcb09ddac2cd7e0aece953748d3a75e8f16e59cf5636d6528d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1911.09622",
    "kind": "arxiv",
    "version": 2
  }
}