Pith Number

pith:HQTI7EHC

pith:2018:HQTI7EHC7B7VKVANEBQLN4ZHJD

not attested not anchored not stored refs pending

The ensemble photometric variability of over $10^5$ quasars in the Dark Energy Camera Legacy Survey and the Sloan Digital Sky Survey

Ian D. McGreer, Qian Yang, Xiaohui Fan, Xue-Bing Wu, Zefeng Li

arxiv:1805.07747 v1 · 2018-05-20 · 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{HQTI7EHC7B7VKVANEBQLN4ZHJD}

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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	2026-05-18T00:11:04.858128Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3c268f90e2f87f55540d2060b6f32748ca7d1cc378dbf0447b922b208b200ade

Aliases

arxiv: 1805.07747 · arxiv_version: 1805.07747v1 · doi: 10.48550/arxiv.1805.07747 · pith_short_12: HQTI7EHC7B7V · pith_short_16: HQTI7EHC7B7VKVAN · pith_short_8: HQTI7EHC

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/HQTI7EHC7B7VKVANEBQLN4ZHJD \
  | 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: 3c268f90e2f87f55540d2060b6f32748ca7d1cc378dbf0447b922b208b200ade

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f4fea7de0fad937e8a69651302f1a461b4d9bcd13cb59f094d32bfb9dbba0b38",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-05-20T09:43:25Z",
    "title_canon_sha256": "0669d5fcf6e925d364fe575e3c9e450884a37ace1977489319b1bff3a42f7240"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.07747",
    "kind": "arxiv",
    "version": 1
  }
}