Pith Number

pith:2XCSFHKL

pith:2011:2XCSFHKLK6HTKTVVEWYJ2EETWN

not attested not anchored not stored refs pending

The optical variability of steep-spectrum radio quasars in the SDSS Stripe 82 region

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

arxiv:1108.0730 v1 · 2011-08-03 · 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{2XCSFHKLK6HTKTVVEWYJ2EETWN}

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	2026-05-18T02:01:03.804746Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d5c5229d4b578f354eb525b09d1093b36a01a9ed739cac070f90697263fdb746

Aliases

arxiv: 1108.0730 · arxiv_version: 1108.0730v1 · doi: 10.48550/arxiv.1108.0730 · pith_short_12: 2XCSFHKLK6HT · pith_short_16: 2XCSFHKLK6HTKTVV · pith_short_8: 2XCSFHKL

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/2XCSFHKLK6HTKTVVEWYJ2EETWN \
  | 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: d5c5229d4b578f354eb525b09d1093b36a01a9ed739cac070f90697263fdb746

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2ae26768dc936115917f71a714bd3c49841e277323d776845e4234634a072ebe",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-08-03T02:49:35Z",
    "title_canon_sha256": "1b5bbaa23980ddb01526b1d9738ddc55d9c90a716b9a5a26d8a943d845958676"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1108.0730",
    "kind": "arxiv",
    "version": 1
  }
}