Pith Number

pith:CCYU36JP

pith:1999:CCYU36JPKA2GAAETOZ35MLQIAT

not attested not anchored not stored refs pending

A Comprehensive Spectral and Variability Study of Narrow-Line Seyfert 1 Galaxies Observed by ASCA: I. Observations and Time Series Analysis

Karen M. Leighly (Columbia University)

arxiv:astro-ph/9907294 v1 · 1999-07-21 · 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{CCYU36JPKA2GAAETOZ35MLQIAT}

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	2026-07-04T16:11:27.210489Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

10b14df92f50346000937677d62e0804d7cc1b303bc6d04f534ed08ab992aca5

Aliases

arxiv: astro-ph/9907294 · arxiv_version: astro-ph/9907294v1 · doi: 10.48550/arxiv.astro-ph/9907294 · pith_short_12: CCYU36JPKA2G · pith_short_16: CCYU36JPKA2GAAET · pith_short_8: CCYU36JP

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/CCYU36JPKA2GAAETOZ35MLQIAT \
  | 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: 10b14df92f50346000937677d62e0804d7cc1b303bc6d04f534ed08ab992aca5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "62ada2d23300cf560ebf03fa3583f5455cec5d8382d7eb60fed587b71fe02840",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-07-21T18:12:23Z",
    "title_canon_sha256": "717eb35341fa0046ab26ed11c23c677ff7af882f0b4cad51e3cb775f36bdb07c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9907294",
    "kind": "arxiv",
    "version": 1
  }
}