Pith Number

pith:AXMXSZ7X

pith:2000:AXMXSZ7XPUN34HILJ2EBRFFCEQ

not attested not anchored not stored refs pending

XMM-Newton monitoring of X-ray variability in the quasar PKS 0558-504

(2) University of Leicester, (3) Istituto TESRE Bologna), F. Gianotti (3) ((1) MPE Garching, J.N. Reeves (2), K.A. Pounds (2), M. Gliozzi (1), M. Trifoglio (3), P.T. O'Brien (2), W. Brinkmann (1)

arxiv:astro-ph/0011159 v1 · 2000-11-08 · 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{AXMXSZ7XPUN34HILJ2EBRFFCEQ}

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	2026-07-04T16:17:34.104425Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

05d97967f77d1bbe1d0b4e881894a22400061a76d914e5cbc440f78ccb1954ab

Aliases

arxiv: astro-ph/0011159 · arxiv_version: astro-ph/0011159v1 · doi: 10.48550/arxiv.astro-ph/0011159 · pith_short_12: AXMXSZ7XPUN3 · pith_short_16: AXMXSZ7XPUN34HIL · pith_short_8: AXMXSZ7X

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/AXMXSZ7XPUN34HILJ2EBRFFCEQ \
  | 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: 05d97967f77d1bbe1d0b4e881894a22400061a76d914e5cbc440f78ccb1954ab

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4e1d2360414c557a16d94866418436d3a5b4719aac9456d47ae88bd1a056ba4b",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-11-08T10:01:59Z",
    "title_canon_sha256": "27b253fcf645e6c53b9844e254319197d57f7157713ea80f1c946bcb13ec7b2a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0011159",
    "kind": "arxiv",
    "version": 1
  }
}