Pith Number

pith:ZEM7DZM3

pith:2004:ZEM7DZM3ECEGPBAJ3BO7G2X344

not attested not anchored not stored refs pending

First XMM-Newton study of two Narrow-Line Seyfert 1 galaxies discovered in the Sloan Digital Sky Survey

G. Di Cocco, G.G.C. Palumbo, G. Malaguti, G. Ponti, L. Foschini, M. Dadina, P. Grandi, R. Della Ceca, V. Braito

arxiv:astro-ph/0408123 v1 · 2004-08-06 · 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{ZEM7DZM3ECEGPBAJ3BO7G2X344}

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	2026-07-04T16:44:27.185997Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c919f1e59b2088678409d85df36afbe70cacec944550be33ea67fabe2386705e

Aliases

arxiv: astro-ph/0408123 · arxiv_version: astro-ph/0408123v1 · doi: 10.48550/arxiv.astro-ph/0408123 · pith_short_12: ZEM7DZM3ECEG · pith_short_16: ZEM7DZM3ECEGPBAJ · pith_short_8: ZEM7DZM3

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/ZEM7DZM3ECEGPBAJ3BO7G2X344 \
  | 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: c919f1e59b2088678409d85df36afbe70cacec944550be33ea67fabe2386705e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f67124acd1adeec2d7ca9cb87c43d74c07d1fd649d97981a975cf427f3a187ad",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-08-06T10:36:58Z",
    "title_canon_sha256": "a6aaf8c3ee3de227367e8b9c0bc265d32f0f50d49bafa85a41036ea4d1402dd8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0408123",
    "kind": "arxiv",
    "version": 1
  }
}