Pith Number

pith:GS5XIUQP

pith:2011:GS5XIUQPLIJGULHNDNMJH4SR4Q

not attested not anchored not stored refs pending

The optical variability of flat-spectrum radio quasars in the SDSS stripe 82 region

Minfeng Gu (SHAO, UCSB), Y. L. Ai (NAOC/Yunnan Observatory)

arxiv:1101.2050 v2 · 2011-01-11 · 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{GS5XIUQPLIJGULHNDNMJH4SR4Q}

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	2026-05-18T02:03:43.115083Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

34bb74520f5a126a2ced1b5893f251e439eb9d32bbb547ca03437dc945c74567

Aliases

arxiv: 1101.2050 · arxiv_version: 1101.2050v2 · doi: 10.48550/arxiv.1101.2050 · pith_short_12: GS5XIUQPLIJG · pith_short_16: GS5XIUQPLIJGULHN · pith_short_8: GS5XIUQP

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/GS5XIUQPLIJGULHNDNMJH4SR4Q \
  | 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: 34bb74520f5a126a2ced1b5893f251e439eb9d32bbb547ca03437dc945c74567

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "95465fd22021ceb4a532d67745fc055422559d83aef5b3f371f3e8b5898292a5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-01-11T06:17:31Z",
    "title_canon_sha256": "597335e1a8ef2387beaa9cc252b99fcf00d0a6a72c692356dca0509b2dd70c4a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1101.2050",
    "kind": "arxiv",
    "version": 2
  }
}