Pith Number

pith:GQRCO24G

pith:2020:GQRCO24GIURC76CJCMSRY6YJCZ

not attested not anchored not stored refs pending

On the Fraction of X-ray Weak Quasars from the Sloan Digital Sky Survey

B. Luo, Hezhen Liu, Jianfeng Wu, John D. Timlin, Q. Ni, W. N. Brandt, Xingting Pu

arxiv:2008.02277 v1 · 2020-08-05 · astro-ph.GA · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GQRCO24GIURC76CJCMSRY6YJCZ}

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	2026-07-05T01:25:03.661750Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3422276b8645222ff84913251c7b09165dbe35a8074042ae71a02a0b7d76e7cb

Aliases

arxiv: 2008.02277 · arxiv_version: 2008.02277v1 · doi: 10.48550/arxiv.2008.02277 · pith_short_12: GQRCO24GIURC · pith_short_16: GQRCO24GIURC76CJ · pith_short_8: GQRCO24G

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/GQRCO24GIURC76CJCMSRY6YJCZ \
  | 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: 3422276b8645222ff84913251c7b09165dbe35a8074042ae71a02a0b7d76e7cb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2273e6f2871dec4394daa55c478ed3962537212f8dcab429b814153afa2769d9",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2020-08-05T18:00:00Z",
    "title_canon_sha256": "9b40429f4282752a4ba8426b88ad4fb8bd028c613ad1558186fea3189f6b86e4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2008.02277",
    "kind": "arxiv",
    "version": 1
  }
}