Pith Number

pith:UPA42SFN

pith:2003:UPA42SFN3R62FD6JRN2KKXK6KN

not attested not anchored not stored refs pending

The XMM-Newton EPIC Background: Production of Background Maps and Event Files

2), (2) University of Leicester, Andrew M. Read (1, Trevor J. Ponman (1) ((1) University of Birmingham, U.K., U.K.)

arxiv:astro-ph/0304147 v2 · 2003-04-08 · 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{UPA42SFN3R62FD6JRN2KKXK6KN}

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	2026-07-04T16:36:49.377652Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3c1cd48addc7da28fc98b74a55d5e537da58fc7291fc16cf88c9bb7f0fd3be0

Aliases

arxiv: astro-ph/0304147 · arxiv_version: astro-ph/0304147v2 · doi: 10.48550/arxiv.astro-ph/0304147 · pith_short_12: UPA42SFN3R62 · pith_short_16: UPA42SFN3R62FD6J · pith_short_8: UPA42SFN

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/UPA42SFN3R62FD6JRN2KKXK6KN \
  | 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: a3c1cd48addc7da28fc98b74a55d5e537da58fc7291fc16cf88c9bb7f0fd3be0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1d07096eeb08c64afb611f894b2124e2edace21be12e33faf21b7ca311da59b8",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-04-08T16:29:16Z",
    "title_canon_sha256": "0bf97a3f798284dae0ad68bce57f2093d62dfd86fdb34a5fef3e437d7bec524c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0304147",
    "kind": "arxiv",
    "version": 2
  }
}