Pith Number

pith:W5RPPLFG

pith:2003:W5RPPLFGE44AUNQWWOK2GCYV5G

not attested not anchored not stored refs pending

Iron K features in the hard X-ray XMM-Newton spectrum of NGC 4151

N.J. Schurch, R.E. Griffiths, R.S. Warwick, S. Sembay

arxiv:astro-ph/0306540 v1 · 2003-06-25 · 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{W5RPPLFGE44AUNQWWOK2GCYV5G}

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	2026-07-04T16:52:03.437056Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b762f7aca627380a3616b395a30b15e999b103281ee17f309c8d0765384d4c97

Aliases

arxiv: astro-ph/0306540 · arxiv_version: astro-ph/0306540v1 · doi: 10.48550/arxiv.astro-ph/0306540 · pith_short_12: W5RPPLFGE44A · pith_short_16: W5RPPLFGE44AUNQW · pith_short_8: W5RPPLFG

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/W5RPPLFGE44AUNQWWOK2GCYV5G \
  | 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: b762f7aca627380a3616b395a30b15e999b103281ee17f309c8d0765384d4c97

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0b0ba0b74cff8725b9af465214fe46741433d5a071261b537aadf387a8e4366b",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-06-25T20:18:20Z",
    "title_canon_sha256": "87d73e159a055ed9ed4f37893080d1cf9b181d5f4383a21d2d03834c8ae9ee48"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0306540",
    "kind": "arxiv",
    "version": 1
  }
}