Pith Number

pith:BN4C3UCR

pith:2010:BN4C3UCRB4QFJQEKAKX6N4B2PK

not attested not anchored not stored refs pending

An R- and I-Band Photometric Variability Survey of the Cygnus OB2 Association

Calen B Henderson, Jose L Prieto, Kris Z Stanek, Ondrej Pejcha

arxiv:1009.5673 v1 · 2010-09-28 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BN4C3UCRB4QFJQEKAKX6N4B2PK}

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	2026-05-18T02:05:15.943571Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0b782dd0510f2054c08a02afe6f03a7a84c651ca847db853c6d5bb7c95259a18

Aliases

arxiv: 1009.5673 · arxiv_version: 1009.5673v1 · doi: 10.48550/arxiv.1009.5673 · pith_short_12: BN4C3UCRB4QF · pith_short_16: BN4C3UCRB4QFJQEK · pith_short_8: BN4C3UCR

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/BN4C3UCRB4QFJQEKAKX6N4B2PK \
  | 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: 0b782dd0510f2054c08a02afe6f03a7a84c651ca847db853c6d5bb7c95259a18

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "18c97ef9baff5b6f00526677696b99a7734cbc6024b74fea5a35ac943cc65228",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2010-09-28T20:00:02Z",
    "title_canon_sha256": "b2812fc29866e00d3430ab7de958e7c1c995bfbaca821b49c305679feec58fd0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1009.5673",
    "kind": "arxiv",
    "version": 1
  }
}