Pith Number

pith:JI2WTYCY

pith:2025:JI2WTYCYX34T2NY45MEK4KXG55

not attested not anchored not stored refs pending

The Quasar-associated 2175 \AA\ Dust Absorbers in the SDSS DR16 Quasar Catalog

Chao Gao, Chenggang Shu, Hubing Xiao, Shangchun Xie, Shaohua Zhang, Yuchong Luo, Zhijian Luo

arxiv:2505.20706 v1 · 2025-05-27 · 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{JI2WTYCYX34T2NY45MEK4KXG55}

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	2026-07-05T11:10:17.259289Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4a3569e058bef93d371ceb08ae2ae6ef46f13a14e6d52ec92d3b6b6b5743e372

Aliases

arxiv: 2505.20706 · arxiv_version: 2505.20706v1 · doi: 10.48550/arxiv.2505.20706 · pith_short_12: JI2WTYCYX34T · pith_short_16: JI2WTYCYX34T2NY4 · pith_short_8: JI2WTYCY

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/JI2WTYCYX34T2NY45MEK4KXG55 \
  | 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: 4a3569e058bef93d371ceb08ae2ae6ef46f13a14e6d52ec92d3b6b6b5743e372

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f80f09b367f88da640580a1032d1bea5ed731809d99357ab7b19638ddcb9958b",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2025-05-27T04:31:16Z",
    "title_canon_sha256": "166e8337d417f4b0acdac790f93b36143dfd06c6bcf4e349fdc726aa5a5fb8dd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2505.20706",
    "kind": "arxiv",
    "version": 1
  }
}