Pith Number

pith:OXHCJVCF

pith:2004:OXHCJVCFY7KHPALRC2XAKFZFG5

not attested not anchored not stored refs pending

XMM-Newton observations of GB B1428+4217: confirmation of intrinsic soft X-ray absorption

A. Celotti, A.C. Fabian, K. Iwasawa, M.A. Worsley

arxiv:astro-ph/0403601 v2 · 2004-03-25 · 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{OXHCJVCFY7KHPALRC2XAKFZFG5}

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	2026-07-04T16:43:28.205940Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

75ce24d445c7d477817116ae0517253776adf5097eb548fe8ae93fa632503271

Aliases

arxiv: astro-ph/0403601 · arxiv_version: astro-ph/0403601v2 · doi: 10.48550/arxiv.astro-ph/0403601 · pith_short_12: OXHCJVCFY7KH · pith_short_16: OXHCJVCFY7KHPALR · pith_short_8: OXHCJVCF

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/OXHCJVCFY7KHPALRC2XAKFZFG5 \
  | 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: 75ce24d445c7d477817116ae0517253776adf5097eb548fe8ae93fa632503271

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3aabbe18a51884e4e7909f02dbd8198a9c23345e80648589ed9fcb519bc66c30",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-03-25T16:48:46Z",
    "title_canon_sha256": "c614333298e4a8ff0b160fdd219234c8300b05737c00236cb5309e80445255fe"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0403601",
    "kind": "arxiv",
    "version": 2
  }
}