Pith Number

pith:7DYF4CPN

pith:2001:7DYF4CPN2HRTPUPBADFULJ3Z5F

not attested not anchored not stored refs pending

X-ray bright optically quiet galaxies: the case of P3

A. Baldi, A. Comastri, C. Vignali, F. Fiore, F. La Franca, G.C. Perola, G. Matt, M. Brusa, M. Mignoli, P. Ciliegi, P. Severgnini, R. Maiolino, S. Molendi (The Hellas2XMM collaboration)

arxiv:astro-ph/0109117 v1 · 2001-09-07 · 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{7DYF4CPN2HRTPUPBADFULJ3Z5F}

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	2026-07-04T14:11:27.707850Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f8f05e09edd1e337d1e100cb45a779e95f095a717e191e71d178e6241f88506c

Aliases

arxiv: astro-ph/0109117 · arxiv_version: astro-ph/0109117v1 · doi: 10.48550/arxiv.astro-ph/0109117 · pith_short_12: 7DYF4CPN2HRT · pith_short_16: 7DYF4CPN2HRTPUPB · pith_short_8: 7DYF4CPN

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/7DYF4CPN2HRTPUPBADFULJ3Z5F \
  | 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: f8f05e09edd1e337d1e100cb45a779e95f095a717e191e71d178e6241f88506c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "10c63bcf5b21ecd1fb114b844d9c1def74dcf6cb0dd456f01548068b4937dd07",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-09-07T15:52:34Z",
    "title_canon_sha256": "9951f29ffb46827f52aac3ea20c16c043959172c01ff5b1f7f5329995bddccf8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0109117",
    "kind": "arxiv",
    "version": 1
  }
}