Pith Number

pith:QLVVLKWU

pith:2006:QLVVLKWU3RNFQBG5N2Q3QSBORZ

not attested not anchored not stored refs pending

Optical Photometrical Observations and Variability for Quasar 4C 29.45

A. C. Gupta, B. C. Qian, H. G. Wang, J. H. Fan, J.H.Yang, J. Tao, Y. Huang, Y. H. Yuan, Y. Liu

arxiv:astro-ph/0610227 v2 · 2006-10-08 · 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{QLVVLKWU3RNFQBG5N2Q3QSBORZ}

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	2026-05-18T01:40:29.396375Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

82eb55aad4dc5a5804dd6ea1b8482e8e6639dc89b7d8cf7c7aa4bfece871580a

Aliases

arxiv: astro-ph/0610227 · arxiv_version: astro-ph/0610227v2 · doi: 10.48550/arxiv.astro-ph/0610227 · pith_short_12: QLVVLKWU3RNF · pith_short_16: QLVVLKWU3RNFQBG5 · pith_short_8: QLVVLKWU

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/QLVVLKWU3RNFQBG5N2Q3QSBORZ \
  | 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: 82eb55aad4dc5a5804dd6ea1b8482e8e6639dc89b7d8cf7c7aa4bfece871580a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "66a2ed238923ce24b3a3f8c252d592a725304e27da01635ca729df1f92ddf47e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2006-10-08T07:01:01Z",
    "title_canon_sha256": "79b07a7c534f392eab77abe0b53c07f2a922b3a305b308f1b5ff88ea6c8c405e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0610227",
    "kind": "arxiv",
    "version": 2
  }
}