Pith Number

pith:HFCPWXU3

pith:2012:HFCPWXU3DNMBYTJ4QFZU4XJA25

not attested not anchored not stored refs pending

Monitoring Quasar Colour Variability in Stripe 82

Chelsea MacLeod, Jesse A. Rogerson, Patrick B. Hall, Zeljko Ivezic

arxiv:1203.2162 v1 · 2012-03-09 · 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{HFCPWXU3DNMBYTJ4QFZU4XJA25}

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	2026-05-18T04:00:27.388386Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3944fb5e9b1b581c4d3c81734e5d20d750b6b73d688421e3a5562320ff02be56

Aliases

arxiv: 1203.2162 · arxiv_version: 1203.2162v1 · doi: 10.48550/arxiv.1203.2162 · pith_short_12: HFCPWXU3DNMB · pith_short_16: HFCPWXU3DNMBYTJ4 · pith_short_8: HFCPWXU3

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/HFCPWXU3DNMBYTJ4QFZU4XJA25 \
  | 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: 3944fb5e9b1b581c4d3c81734e5d20d750b6b73d688421e3a5562320ff02be56

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "19f3f4089a03b13f496fbfbda0b291b22c9f621a87c60e4d1223bcf9abdff531",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-03-09T19:10:21Z",
    "title_canon_sha256": "cd671e57058b7255886789532eb42e844b9db2d0c2524624def99555b79f1c86"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.2162",
    "kind": "arxiv",
    "version": 1
  }
}