Pith Number

pith:QWQSZV63

pith:2021:QWQSZV63FDVDQVHH6CTKIX42MO

not attested not anchored not stored refs pending

Taking a Long Look: A Two-Decade Reverberation Mapping Study of High-Luminosity Quasars

C. J. Grier, Dan Maoz, Donald P. Schneider, Hagai Netzer, Ohad Shemmer, Shai Kaspi, W. N. Brandt

arxiv:2106.00691 v1 · 2021-06-01 · 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{QWQSZV63FDVDQVHH6CTKIX42MO}

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	2026-07-05T02:45:39.086181Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85a12cd7db28ea3854e7f0a6a45f9a63a1e3d547a99528452dc4c4b77e3b128d

Aliases

arxiv: 2106.00691 · arxiv_version: 2106.00691v1 · doi: 10.48550/arxiv.2106.00691 · pith_short_12: QWQSZV63FDVD · pith_short_16: QWQSZV63FDVDQVHH · pith_short_8: QWQSZV63

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/QWQSZV63FDVDQVHH6CTKIX42MO \
  | 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: 85a12cd7db28ea3854e7f0a6a45f9a63a1e3d547a99528452dc4c4b77e3b128d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e6affd5a6c73d18cfc68763a02ec705cfccf85a069a014933614401f2a36540b",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-06-01T18:00:03Z",
    "title_canon_sha256": "4f74e2c8c6c9fdd28e34c93fbe2d4f9f89edfc0a3f60d47e13e1c958583447cc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2106.00691",
    "kind": "arxiv",
    "version": 1
  }
}