Pith Number

pith:Y267S7ZX

pith:2009:Y267S7ZXWXZJSHOPHSCRCFGDDL

not attested not anchored not stored refs pending

Quasar Optical Variability in the Palomar-QUEST Survey

Anne Bauer, Charles Baltay, David Rabinowitz, Jonathan Jerke, Nancy Ellman, Paolo Coppi, Richard Scalzo

arxiv:0902.4103 v1 · 2009-02-24 · 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{Y267S7ZXWXZJSHOPHSCRCFGDDL}

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	2026-05-18T04:29:16.287539Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c6bdf97f37b5f2991dcf3c851114c31af087e4e70966db521dfd39f8d2a37071

Aliases

arxiv: 0902.4103 · arxiv_version: 0902.4103v1 · doi: 10.48550/arxiv.0902.4103 · pith_short_12: Y267S7ZXWXZJ · pith_short_16: Y267S7ZXWXZJSHOP · pith_short_8: Y267S7ZX

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/Y267S7ZXWXZJSHOPHSCRCFGDDL \
  | 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: c6bdf97f37b5f2991dcf3c851114c31af087e4e70966db521dfd39f8d2a37071

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bac206608b02fbae0f9e606800186f0e70d6981b9be4aff9694ae4ef939c81a4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-02-24T09:19:12Z",
    "title_canon_sha256": "ff05ca7efb2ddbdad9e780f5e962ce27e24312ef210cda9bbaf0da0caca22521"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.4103",
    "kind": "arxiv",
    "version": 1
  }
}