Pith Number

pith:XSQK4W7V

pith:2009:XSQK4W7VDUMODOAF34FDBGCBWP

not attested not anchored not stored refs pending

Blazar Optical Variability in the Palomar-QUEST Survey

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

arxiv:0905.1416 v1 · 2009-05-09 · 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{XSQK4W7VDUMODOAF34FDBGCBWP}

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	2026-05-18T04:29:43.096992Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bca0ae5bf51d18e1b805df0a309841b3d89c1fa6a1cdf8400973a9b9ff4c7377

Aliases

arxiv: 0905.1416 · arxiv_version: 0905.1416v1 · doi: 10.48550/arxiv.0905.1416 · pith_short_12: XSQK4W7VDUMO · pith_short_16: XSQK4W7VDUMODOAF · pith_short_8: XSQK4W7V

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/XSQK4W7VDUMODOAF34FDBGCBWP \
  | 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: bca0ae5bf51d18e1b805df0a309841b3d89c1fa6a1cdf8400973a9b9ff4c7377

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f4e3ec7d123b3b8bf8e8dd8384125e6e06bfdd7246af2378bb7a5d54651d67ad",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-05-09T17:34:36Z",
    "title_canon_sha256": "8c0ae68fae0993a3f9a7059e00a1d066a9ac59bbb1952529410680e615f2c3e7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.1416",
    "kind": "arxiv",
    "version": 1
  }
}