Pith Number

pith:4D7PVN6Z

pith:2000:4D7PVN6ZJZNZQKVSYVJOIQY264

not attested not anchored not stored refs pending

X-ray absorption lines in the Seyfert 1 galaxy NGC 5548 discovered with Chandra-LETGS

A.C. Brinkman, D.A. Liedahl, J.S. Kaastra, R. Mewe, S. Komossa

arxiv:astro-ph/0002345 v1 · 2000-02-17 · 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{4D7PVN6ZJZNZQKVSYVJOIQY264}

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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.

Cited by

1 paper in Pith

Measuring Outflow Distances in NGC 5548 Using Absorption-Line Variability Diagnostics

Receipt and verification

First computed	2026-07-04T14:10:11.428513Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e0fefab7d94e5b982ab2c552e4431af739aaa3e41dd99494d2f25b9c1f247f4b

Aliases

arxiv: astro-ph/0002345 · arxiv_version: astro-ph/0002345v1 · doi: 10.48550/arxiv.astro-ph/0002345 · pith_short_12: 4D7PVN6ZJZNZ · pith_short_16: 4D7PVN6ZJZNZQKVS · pith_short_8: 4D7PVN6Z

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/4D7PVN6ZJZNZQKVSYVJOIQY264 \
  | 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: e0fefab7d94e5b982ab2c552e4431af739aaa3e41dd99494d2f25b9c1f247f4b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bd451a2971d1d3037ee7ef496f3d7a653426042b7b318c948f6b1d14d435e790",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-02-17T13:19:23Z",
    "title_canon_sha256": "3c02c352e90e8dd30c3ab27a22a23c814b3367467eeabef163b446914a84d8af"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0002345",
    "kind": "arxiv",
    "version": 1
  }
}