Pith Number

pith:VL3IKMC4

pith:2002:VL3IKMC4RNUXELQ66FZCQWRE27

not attested not anchored not stored refs pending

X-ray background measurements with XMM-Newton EPIC

A. De Luca, D. H. Lumb, M. Page, R. S. Warwick

arxiv:astro-ph/0204147 v1 · 2002-04-09 · 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{VL3IKMC4RNUXELQ66FZCQWRE27}

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	2026-07-04T16:29:40.405115Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

aaf685305c8b69722e1ef172285a24d7dc163b81c6315eabdb0fd96be2e04de7

Aliases

arxiv: astro-ph/0204147 · arxiv_version: astro-ph/0204147v1 · doi: 10.48550/arxiv.astro-ph/0204147 · pith_short_12: VL3IKMC4RNUX · pith_short_16: VL3IKMC4RNUXELQ6 · pith_short_8: VL3IKMC4

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/VL3IKMC4RNUXELQ66FZCQWRE27 \
  | 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: aaf685305c8b69722e1ef172285a24d7dc163b81c6315eabdb0fd96be2e04de7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f20cd2628db4189a0bf9422b272d1cbcd592817da71a7ddfcc2a58bc75ee316e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-04-09T09:57:05Z",
    "title_canon_sha256": "ecefaf9406393144b7d752720dedad709436a8d777762b9ba90245f33ee7f0d5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0204147",
    "kind": "arxiv",
    "version": 1
  }
}