Pith Number

pith:VXTYKD4I

pith:2001:VXTYKD4IG5BTJRAUGHFQE7D4HU

not attested not anchored not stored refs pending

Extreme X-ray Behavior in the Low-Luminosity Active Nucleus of NGC 4395

A.V. Filippenko, E.C. Moran, G. Chartas, K.M. Leighly, L.C. Ho, M. Eracleous, P.R. Blanco

arxiv:astro-ph/0111472 v1 · 2001-11-26 · 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{VXTYKD4IG5BTJRAUGHFQE7D4HU}

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	2026-07-04T14:11:39.605983Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ade7850f88374334c41431cb027c7c3d2633955f2f8531513ce18867c7886db1

Aliases

arxiv: astro-ph/0111472 · arxiv_version: astro-ph/0111472v1 · doi: 10.48550/arxiv.astro-ph/0111472 · pith_short_12: VXTYKD4IG5BT · pith_short_16: VXTYKD4IG5BTJRAU · pith_short_8: VXTYKD4I

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/VXTYKD4IG5BTJRAUGHFQE7D4HU \
  | 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: ade7850f88374334c41431cb027c7c3d2633955f2f8531513ce18867c7886db1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e1fb81952b5a70fe4bf1f5c61f7fa617a00dbf69eb4ee0feeff84d474607187e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-11-26T09:37:44Z",
    "title_canon_sha256": "6c76c95a763104d047f688948c361e4239404a0c69a86b1340453ce3ca318ae5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0111472",
    "kind": "arxiv",
    "version": 1
  }
}