Pith Number

pith:WK7ANCZG

pith:2019:WK7ANCZGCHGDVIKXMOBDNPKAHI

not attested not anchored not stored refs pending

Active Galactic Nucleus Pairs from the Sloan Digital Sky Survey. III. Chandra X-ray Observations Unveil Obscured Double Nuclei

Hengxiao Guo, Meicun Hou, Paul J. Green, Xin Liu, Yue Shen, Zhiyuan Li

arxiv:1904.12998 v2 · 2019-04-30 · 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{WK7ANCZGCHGDVIKXMOBDNPKAHI}

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	2026-07-05T00:06:41.929650Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b2be068b2611cc3aa157638236bd403a33b4b46fa37690d76a35452006ea200f

Aliases

arxiv: 1904.12998 · arxiv_version: 1904.12998v2 · doi: 10.48550/arxiv.1904.12998 · pith_short_12: WK7ANCZGCHGD · pith_short_16: WK7ANCZGCHGDVIKX · pith_short_8: WK7ANCZG

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/WK7ANCZGCHGDVIKXMOBDNPKAHI \
  | 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: b2be068b2611cc3aa157638236bd403a33b4b46fa37690d76a35452006ea200f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3672ca2eb02473cb0feee2b64a20cbe0522c22abb343c3fa54bb4b5087b27f0d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-04-30T00:16:24Z",
    "title_canon_sha256": "3323840fa384d4bff1a96b8c58305267662dbbc88ce29c63e37dec2af24de449"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.12998",
    "kind": "arxiv",
    "version": 2
  }
}