Pith Number

pith:7L6UVDV4

pith:2004:7L6UVDV4Y5ZK5KJJ5VTNPRTV2Q

not attested not anchored not stored refs pending

The early stage of a cosmic collision? XMM-Newton unveils two obscured AGN in the galaxy pair ESO509-IG066

E; (2) Universita' Roma Tre, E.Jimenez-Bailon (1), E.Piconcelli (1), G.Matt (2) ((1) European Space Astronomy Center, I), M.Guainazzi (1), Villafranca del Castillo

arxiv:astro-ph/0411435 v1 · 2004-11-16 · 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{7L6UVDV4Y5ZK5KJJ5VTNPRTV2Q}

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	2026-07-04T16:45:14.157611Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fafd4a8ebcc772aea929ed66d7c675d400c75fd1ad647c3938de048ec6cfdf1c

Aliases

arxiv: astro-ph/0411435 · arxiv_version: astro-ph/0411435v1 · doi: 10.48550/arxiv.astro-ph/0411435 · pith_short_12: 7L6UVDV4Y5ZK · pith_short_16: 7L6UVDV4Y5ZK5KJJ · pith_short_8: 7L6UVDV4

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/7L6UVDV4Y5ZK5KJJ5VTNPRTV2Q \
  | 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: fafd4a8ebcc772aea929ed66d7c675d400c75fd1ad647c3938de048ec6cfdf1c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8a2c0d26e7ca6e6b4490e555b64cc28b6a78e6b80f659cc23d1d3f0317fd4fec",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-11-16T08:29:45Z",
    "title_canon_sha256": "3751a377d131b9f5b83b70dd224c13d5d896683095994504aec1d1d001798273"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0411435",
    "kind": "arxiv",
    "version": 1
  }
}