Pith Number

pith:IOBMLFMZ

pith:2012:IOBMLFMZNB2CNCYMOUNOKD2JM2

not attested not anchored not stored refs pending

SDSS quasars in the WISE preliminary data release and quasar candidate selection with optical/infrared colors

Guoqiang Hao, Nanbo Peng, Xue-Bing Wu, Yanxia Zhang, Zhendong Jia

arxiv:1204.6197 v2 · 2012-04-27 · 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{IOBMLFMZNB2CNCYMOUNOKD2JM2}

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	2026-05-18T01:57:43.250329Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4382c595996874268b0c751ae50f49669755da4cb5706a43ed02576828ee2ebc

Aliases

arxiv: 1204.6197 · arxiv_version: 1204.6197v2 · doi: 10.48550/arxiv.1204.6197 · pith_short_12: IOBMLFMZNB2C · pith_short_16: IOBMLFMZNB2CNCYM · pith_short_8: IOBMLFMZ

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/IOBMLFMZNB2CNCYMOUNOKD2JM2 \
  | 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: 4382c595996874268b0c751ae50f49669755da4cb5706a43ed02576828ee2ebc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "864d380e8b21cfc368b962ac92fe1af6f7756245fe2520723484f1b1cabeb3c9",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/3.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-04-27T13:03:46Z",
    "title_canon_sha256": "296ce688031ded3b279aba83c970815e643cd661955fc4a71ba131dbce9fffc0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.6197",
    "kind": "arxiv",
    "version": 2
  }
}