Pith Number

pith:IOMB626B

pith:2014:IOMB626BFUFZLKC3XRULBE2JZP

not attested not anchored not stored refs pending

The optical variability of SDSS quasars from multi-epoch spectroscopy: I. Results from 60 quasars with $\geq$ six-epoch spectra

Hengxiao Guo (SHAO), Minfeng Gu (SHAO)

arxiv:1407.3025 v1 · 2014-07-11 · astro-ph.HE · astro-ph.CO · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IOMB626BFUFZLKC3XRULBE2JZP}

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	2026-05-18T01:42:37.801252Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

43981f6bc12d0b95a85bbc68b09349cbd8e81cefaa46bc90a2c70b95274ce65a

Aliases

arxiv: 1407.3025 · arxiv_version: 1407.3025v1 · doi: 10.48550/arxiv.1407.3025 · pith_short_12: IOMB626BFUFZ · pith_short_16: IOMB626BFUFZLKC3 · pith_short_8: IOMB626B

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/IOMB626BFUFZLKC3XRULBE2JZP \
  | 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: 43981f6bc12d0b95a85bbc68b09349cbd8e81cefaa46bc90a2c70b95274ce65a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7608a4a16ef66d303a2820a399a1e3e0884cec78d3228b303eea4756e8755262",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2014-07-11T04:41:52Z",
    "title_canon_sha256": "5cf5c63c50db6df1849ab9177809a94d32cc7b704ee816a73e6ca8e2a3b28a65"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1407.3025",
    "kind": "arxiv",
    "version": 1
  }
}