Pith Number

pith:4BNI3ZXD

pith:2016:4BNI3ZXDBUVLZSHAROFPP3IHF7

not attested not anchored not stored refs pending

The Timescale-Dependent Color Variability of Quasars Viewed with GALEX

Fei-Fan Zhu (USTC), Jun-Xian Wang (USTC), Yu-Han Sun (USTC), Zhen-Yi Cai (USTC)

arxiv:1609.07136 v1 · 2016-09-22 · astro-ph.GA · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4BNI3ZXDBUVLZSHAROFPP3IHF7}

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	2026-05-18T00:55:41.302426Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e05a8de6e30d2abcc8e08b8af7ed072fe3e96b93ce73303e0e21e64fc3bfac58

Aliases

arxiv: 1609.07136 · arxiv_version: 1609.07136v1 · doi: 10.48550/arxiv.1609.07136 · pith_short_12: 4BNI3ZXDBUVL · pith_short_16: 4BNI3ZXDBUVLZSHA · pith_short_8: 4BNI3ZXD

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/4BNI3ZXDBUVLZSHAROFPP3IHF7 \
  | 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: e05a8de6e30d2abcc8e08b8af7ed072fe3e96b93ce73303e0e21e64fc3bfac58

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "344afdc64eb4cb1b5f26f07397f06ae7693902b2ef33834ea3da3bff7178a226",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2016-09-22T19:59:20Z",
    "title_canon_sha256": "e3ef5d35acce18668d3f221a53ceb7e3e94c200e2a618fad8bc02525553299a7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1609.07136",
    "kind": "arxiv",
    "version": 1
  }
}