Pith Number

pith:EVUL5ZLT

pith:2007:EVUL5ZLTWHL46RGLB5LHZR75V7

not attested not anchored not stored refs pending

kHz QPO pairs expose the neutron star of Circinus X-1

D. Altamirano, M. Klein-Wolt, M. van der Klis, R. Wijnands, S. Boutloukos

arxiv:astro-ph/0701660 v2 · 2007-01-23 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EVUL5ZLTWHL46RGLB5LHZR75V7}

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	2026-05-18T00:59:12.664105Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2568bee573b1d7cf44cb0f567cc7fdafec61ea8779dcee56fbec69644182738f

Aliases

arxiv: astro-ph/0701660 · arxiv_version: astro-ph/0701660v2 · doi: 10.48550/arxiv.astro-ph/0701660 · pith_short_12: EVUL5ZLTWHL4 · pith_short_16: EVUL5ZLTWHL46RGL · pith_short_8: EVUL5ZLT

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/EVUL5ZLTWHL46RGLB5LHZR75V7 \
  | 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: 2568bee573b1d7cf44cb0f567cc7fdafec61ea8779dcee56fbec69644182738f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3a56c6d679c393c71765342053a8ac64e876bb3d7575a220bfd5868032d69fdc",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-01-23T20:57:52Z",
    "title_canon_sha256": "aed0685574ebf1ce9f5e2690e5e3891fc08c64a13a16bfd44acb7f11a1d1cf2d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0701660",
    "kind": "arxiv",
    "version": 2
  }
}