Pith Number

pith:7RT3EL5W

pith:2009:7RT3EL5WTUQ4VRLRXR46JEZJS6

not attested not anchored not stored refs pending

X-ray variability time scales in Active Galactic Nuclei

T. J.-L. Courvoisier, W. Ishibashi

arxiv:0905.4842 v1 · 2009-05-29 · astro-ph.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7RT3EL5WTUQ4VRLRXR46JEZJS6}

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	2026-05-18T02:13:30.759775Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc67b22fb69d21cac571bc79e493299796ccf7bc3a8cf85b93ebd786ae70d9fe

Aliases

arxiv: 0905.4842 · arxiv_version: 0905.4842v1 · doi: 10.48550/arxiv.0905.4842 · pith_short_12: 7RT3EL5WTUQ4 · pith_short_16: 7RT3EL5WTUQ4VRLR · pith_short_8: 7RT3EL5W

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/7RT3EL5WTUQ4VRLRXR46JEZJS6 \
  | 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: fc67b22fb69d21cac571bc79e493299796ccf7bc3a8cf85b93ebd786ae70d9fe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7301aa442ed1d54238fdad9f9304a2747aff282e2cc29e14f3dd935644c317cc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-05-29T12:17:58Z",
    "title_canon_sha256": "d1685352509e86ee1c6b10895cfa6e1cbf1cdbe652207c84e3b2a38a25cac94e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.4842",
    "kind": "arxiv",
    "version": 1
  }
}