Pith Number

pith:2JQUA3PD

pith:2011:2JQUA3PDYMFHTW6EJP5MVODKLF

not attested not anchored not stored refs pending

A Description of Quasar Variability Measured Using Repeated SDSS and POSS Imaging

Andrew C. Becker, Brandon C. Kelly, Branimir Sesar, Chelsea L. MacLeod, Christopher S. Kochanek, Donald P. Schneider, Gordon T. Richards, Patrick B. Hall, Robert H. Lupton, Scott F. Anderson, Wim de Vries, Zeljko Ivezic

arxiv:1112.0679 v2 · 2011-12-03 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2JQUA3PDYMFHTW6EJP5MVODKLF}

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	2026-05-18T03:53:07.027081Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d261406de3c30a79dbc44bfacab86a597e5c7e6878c981b5a63d6dafdac2c3a2

Aliases

arxiv: 1112.0679 · arxiv_version: 1112.0679v2 · doi: 10.48550/arxiv.1112.0679 · pith_short_12: 2JQUA3PDYMFH · pith_short_16: 2JQUA3PDYMFHTW6E · pith_short_8: 2JQUA3PD

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/2JQUA3PDYMFHTW6EJP5MVODKLF \
  | 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: d261406de3c30a79dbc44bfacab86a597e5c7e6878c981b5a63d6dafdac2c3a2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f1d6509cc8c98bc91cb2eda3d6c11d2184038d7e05783495ee7aee55ed89a7c0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-12-03T18:22:49Z",
    "title_canon_sha256": "65f35ff9fd2a442f66002483257e92ced42043b26d27ceef014d71f5d66c0cef"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1112.0679",
    "kind": "arxiv",
    "version": 2
  }
}