Pith Number

pith:VQKEZ5C5

pith:2001:VQKEZ5C5PSLHOHW5T7WCYI7WQL

not attested not anchored not stored refs pending

On the nature of X-ray absorption in Seyfert 2 galaxies

2), 4), E; (2) SSD/ESTEC, ESA, F.Fiore (3, G.C.Perola (5) ((1) XMM-Newton SOC, G.Matt (5), I), I; (4) BeppoSAX Science Data Center, I; (4) Universita' "Roma 3", M.Guainazzi (1, NL; (3) Osservatorio Astronomico di Roma, Noordwijk, Roma, VILSPA/ESA

arxiv:astro-ph/0106150 v1 · 2001-06-08 · 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{VQKEZ5C5PSLHOHW5T7WCYI7WQL}

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	2026-07-04T16:23:30.750349Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac144cf45d7c96771edd9fec2c23f682e427a6635db84c08ebd68e66e91ae7aa

Aliases

arxiv: astro-ph/0106150 · arxiv_version: astro-ph/0106150v1 · doi: 10.48550/arxiv.astro-ph/0106150 · pith_short_12: VQKEZ5C5PSLH · pith_short_16: VQKEZ5C5PSLHOHW5 · pith_short_8: VQKEZ5C5

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/VQKEZ5C5PSLHOHW5T7WCYI7WQL \
  | 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: ac144cf45d7c96771edd9fec2c23f682e427a6635db84c08ebd68e66e91ae7aa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d2fe4e8e551d88df3bccc595ae40f63ffba0fae6685ed1cee146c41992becb78",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-06-08T06:17:39Z",
    "title_canon_sha256": "4b5da72b2c8c224a47b64d5b4adac01334bf4ae6982d3ced0fe15b81089c52dd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0106150",
    "kind": "arxiv",
    "version": 1
  }
}