Pith Number

pith:DX6JERQ3

pith:2009:DX6JERQ3YUU2GCWM7NUMGKF2DH

not attested not anchored not stored refs pending

Characterizing black hole variability with nonlinear methods: the case of the X-ray Nova 4U 1543-47

C. Raeth, I.E. Papadakis, M. Gliozzi, P. Reig

arxiv:0912.4676 v1 · 2009-12-23 · 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{DX6JERQ3YUU2GCWM7NUMGKF2DH}

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	2026-05-18T02:10:14.106373Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1dfc92461bc529a30accfb68c328ba19cdefcfe7746dede367ffcf2de1058c6d

Aliases

arxiv: 0912.4676 · arxiv_version: 0912.4676v1 · doi: 10.48550/arxiv.0912.4676 · pith_short_12: DX6JERQ3YUU2 · pith_short_16: DX6JERQ3YUU2GCWM · pith_short_8: DX6JERQ3

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/DX6JERQ3YUU2GCWM7NUMGKF2DH \
  | 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: 1dfc92461bc529a30accfb68c328ba19cdefcfe7746dede367ffcf2de1058c6d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9b0ac119692ecab2fd551f700d727d5ffba00d7a3771143cf6991ce9695377d5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-12-23T16:01:46Z",
    "title_canon_sha256": "b65be5fb1972dd24c876452aa9d79ec5c9c39023104ad6c596b2568af02e3d43"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.4676",
    "kind": "arxiv",
    "version": 1
  }
}