Pith Number

pith:YTV75T6U

pith:2001:YTV75T6UZ5MUOVWSNQXNYS4AV5

not attested not anchored not stored refs pending

Soft X-ray Spectroscopy of Seyfert 2 Galaxies

A.C. Brinkman, A. Kinkhabwala, D.A. Liedahl, E. Behar, F. Paerels, J.S. Kaastra, M. Sako, R. van der Meer, S.M. Kahn

arxiv:astro-ph/0107224 v1 · 2001-07-12 · 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{YTV75T6UZ5MUOVWSNQXNYS4AV5}

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	2026-07-04T14:11:22.612860Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c4ebfecfd4cf594756d26c2edc4b80af4aba3123a5a4d8b0d6e6db59664ff992

Aliases

arxiv: astro-ph/0107224 · arxiv_version: astro-ph/0107224v1 · doi: 10.48550/arxiv.astro-ph/0107224 · pith_short_12: YTV75T6UZ5MU · pith_short_16: YTV75T6UZ5MUOVWS · pith_short_8: YTV75T6U

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/YTV75T6UZ5MUOVWSNQXNYS4AV5 \
  | 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: c4ebfecfd4cf594756d26c2edc4b80af4aba3123a5a4d8b0d6e6db59664ff992

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a1c8e6c7557f314bf15082b4eb2e6cb5b868490498dde64637fb4ad525d6a959",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-07-12T21:06:15Z",
    "title_canon_sha256": "9ffb8bd9d1ed26545e5ca6892c0974b06582c992cc76ec98a75d7c120a96a417"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0107224",
    "kind": "arxiv",
    "version": 1
  }
}