Pith Number

pith:WKU7LFDW

pith:2013:WKU7LFDWWNJSUEQYY3BI62J4JW

not attested not anchored not stored refs pending

The spectral variability of quasar SDSS J030639.57+000343.1

Hengxiao Guo, Minfeng Gu

arxiv:1306.0273 v1 · 2013-06-03 · 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{WKU7LFDWWNJSUEQYY3BI62J4JW}

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	2026-05-18T01:49:38.734467Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b2a9f59476b3532a1218c6c28f693c4db9e159499b04d92fece2aec621b2c185

Aliases

arxiv: 1306.0273 · arxiv_version: 1306.0273v1 · doi: 10.48550/arxiv.1306.0273 · pith_short_12: WKU7LFDWWNJS · pith_short_16: WKU7LFDWWNJSUEQY · pith_short_8: WKU7LFDW

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/WKU7LFDWWNJSUEQYY3BI62J4JW \
  | 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: b2a9f59476b3532a1218c6c28f693c4db9e159499b04d92fece2aec621b2c185

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "961ce39d140f5c825555047b03e9d4ae28f5585f99d2a33c99785af5f92ccb16",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-06-03T01:57:36Z",
    "title_canon_sha256": "15a9a95331a93d36fae62cb7242323968c997a997861e6e46aa5324143c73e88"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.0273",
    "kind": "arxiv",
    "version": 1
  }
}