Pith Number

pith:R54Y7AHR

pith:2002:R54Y7AHRC4Q7IAIXYPX3TKRGEG

not attested not anchored not stored refs pending

Long Term Spectral Variability of Seyfert Galaxies from RXTE Color-Flux Diagrams

F. Haardt, I. E. Papadakis, I. M. McHardy, L. Maraschi, P. O. Petrucci, P. Uttley

arxiv:astro-ph/0202498 v1 · 2002-02-27 · 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{R54Y7AHRC4Q7IAIXYPX3TKRGEG}

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	2026-07-04T16:29:28.328793Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8f798f80f11721f40117c3efb9aa2621880f735d7e822fbf29cc623f77af6b52

Aliases

arxiv: astro-ph/0202498 · arxiv_version: astro-ph/0202498v1 · doi: 10.48550/arxiv.astro-ph/0202498 · pith_short_12: R54Y7AHRC4Q7 · pith_short_16: R54Y7AHRC4Q7IAIX · pith_short_8: R54Y7AHR

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/R54Y7AHRC4Q7IAIXYPX3TKRGEG \
  | 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: 8f798f80f11721f40117c3efb9aa2621880f735d7e822fbf29cc623f77af6b52

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5cf49d0fd4fda87ea0dbd6b1e107b27ade046f0edb15f0a0956ba48823eff6cb",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-02-27T08:25:37Z",
    "title_canon_sha256": "94ce7e03f6e76b75cd84dfca2852c92c86de5d08b2242e0c73cbf7a57fa9a2e9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0202498",
    "kind": "arxiv",
    "version": 1
  }
}