Pith Number

pith:UZQKFE4L

pith:2010:UZQKFE4LXHVLMFQPRH4DOCNQRT

not attested not anchored not stored refs pending

Long-Term Optical Continuum Color Variability of Nearby Active Galactic Nuclei

2), 2) ((1) Institute of Astronomy, (2) Department of Astronomy, 3), (3) Research Center for the Early Universe, 4), (4) National Astronomical Observatory, (6) Institute of Space, Astronomical Science, Hiroyuki Tomita (5), Institute of Astronomy, Japan (5) Kiso Observatory, Japan Aerospace Exploration Agency), Keigo Enya (6), Masahiro Suganuma (6), School of Science, Shintaro Koshida (2, Shota Sugawara (1, Takeo Minezaki (1), Tsutomu Aoki (5), University of Tokyo, Yuka Katsuno Uchimoto (1), Yukiyasu Kobayashi (4), Yu Sakata (1, Yuzuru Yoshii (1

arxiv:1001.5162 v1 · 2010-01-28 · 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{UZQKFE4LXHVLMFQPRH4DOCNQRT}

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	2026-05-18T02:09:28.811854Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a660a2938bb9eab6160f89f83709b08cda8819eb410723e8ee17eed5179d9cee

Aliases

arxiv: 1001.5162 · arxiv_version: 1001.5162v1 · doi: 10.48550/arxiv.1001.5162 · pith_short_12: UZQKFE4LXHVL · pith_short_16: UZQKFE4LXHVLMFQP · pith_short_8: UZQKFE4L

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/UZQKFE4LXHVLMFQPRH4DOCNQRT \
  | 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: a660a2938bb9eab6160f89f83709b08cda8819eb410723e8ee17eed5179d9cee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f7158d6184c6c380531f3e64bbfdd08d4db91d41fe359f3ed2583509c170b02a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-01-28T12:44:24Z",
    "title_canon_sha256": "85fe88b372690882e8664166144a68eb98583461f9a353f907d368060484c4fd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1001.5162",
    "kind": "arxiv",
    "version": 1
  }
}