Pith Number

pith:BI4UNQJ7

pith:2003:BI4UNQJ7XXFOSFAKGQA53STABU

not attested not anchored not stored refs pending

The 2-8 keV cosmic X-ray background spectrum as observed with XMM-Newton

Andrea De Luca, Milan), Silvano Molendi (IASF

arxiv:astro-ph/0311538 v1 · 2003-11-24 · 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{BI4UNQJ7XXFOSFAKGQA53STABU}

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	2026-05-18T04:23:00.854467Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0a3946c13fbdcae9140a3401ddca600d160430932d7d6355da4a43f96b59b89e

Aliases

arxiv: astro-ph/0311538 · arxiv_version: astro-ph/0311538v1 · doi: 10.48550/arxiv.astro-ph/0311538 · pith_short_12: BI4UNQJ7XXFO · pith_short_16: BI4UNQJ7XXFOSFAK · pith_short_8: BI4UNQJ7

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/BI4UNQJ7XXFOSFAKGQA53STABU \
  | 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: 0a3946c13fbdcae9140a3401ddca600d160430932d7d6355da4a43f96b59b89e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8c96142f00807fa8f6da5ea451815f31f7eff508e05f997cd6dc6a74eb48e30e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-11-24T16:55:51Z",
    "title_canon_sha256": "356c9abebcd8483f9061eb266a9214068cbf7df042424df1eb9b5ba9093ff817"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0311538",
    "kind": "arxiv",
    "version": 1
  }
}