Pith Number

pith:5GVZW45G

pith:2004:5GVZW45GI3OHXONA4TJS6LMTID

not attested not anchored not stored refs pending

Simultaneous X-ray and Ultraviolet spectroscopy of the Seyfert galaxy NGC 5548. III. X-ray time variability

D.A. Liedahl, D.M. Crenshaw, F.B.S. Paerels, I.M. George, J.S. Kaastra, K.C. Steenbrugge, N. Arav, R.L.J. van der Meer, S.B. Kraemer, T.J. Turner, T. Yaqoob

arxiv:astro-ph/0404461 v1 · 2004-04-23 · 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{5GVZW45GI3OHXONA4TJS6LMTID}

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	2026-07-04T16:43:38.175616Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e9ab9b73a646dc7bb9a0e4d32f2d9340d8be92e9c76d816199b1c8651d167f7f

Aliases

arxiv: astro-ph/0404461 · arxiv_version: astro-ph/0404461v1 · doi: 10.48550/arxiv.astro-ph/0404461 · pith_short_12: 5GVZW45GI3OH · pith_short_16: 5GVZW45GI3OHXONA · pith_short_8: 5GVZW45G

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/5GVZW45GI3OHXONA4TJS6LMTID \
  | 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: e9ab9b73a646dc7bb9a0e4d32f2d9340d8be92e9c76d816199b1c8651d167f7f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b2e99080607cadbfe019c8f9ebab2210adecf95cb7e53e827dc8efe346ab30ac",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-04-23T10:18:23Z",
    "title_canon_sha256": "6bab928e9f537ef6f55625b35b67e82ee0f41d04bda97a2d75d0cf1d6cfba5e0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0404461",
    "kind": "arxiv",
    "version": 1
  }
}